Caveat:- I havnt done this and dont know anyone who has, it was just a thought.
Commercial food mixers such as these have a variety of stainless bowls that may suit.
The top lip is rolled and they have reinforcing bands around some of them.
(there are other manufacturers)
They can be purchased second hand as well as new.
As to price, I have no idea, as I said, it was just a thought.
|
Re: Base plate and Chamber
Hi
There is an equation
P=1000(1-square root(1-1600(t^2/d^2)))
P outer pressure pound/inch
t wall thickness
d outer diameter of the chamber measured in inch
I hope this helps, for me worked!
Attila
The Hun
www.ebeamguns.com
toggle quoted message
Show quoted text
--- In VacuumX@..., "arainho_cl" <aneves@...> wrote:
Hi,
I just got an 16" x 1" thick 1020 steel disc (SS was too expensive) for my new base plate. I turned it flat and to prevent rusting I would like to have it chromed. Is there any objections to chroming the base plate. Is chrome or niquel better?
I now want to make a Stainless Steel chamber and have been wondering what is the minimum thickness I can use for an 14" bell shaped chamber.
Regards and thanks for all the advices,
Alfredo
|
Re: Base plate and Chamber
Alfredo,
I think it is OK. In spite of the fact that currently ball valves practically aren't used in industrial relatively big vacuum systems, they should be good for not a very big systems with manual control. At least I do not see any limitations to use it between diffusion and roughing pumps. Regarding the safety - if you use manual control, in any case all depends on your reaction speed - how fast you close it in case of emergency. Actually electromagnetic or pneumo angle or in-line valves are faster, of course.
Regards,
Vladimir
arainho_cl wrote:
toggle quoted message
Show quoted text
Vladimir,
Is it ok to use ball valve to isolate the diffusion pump from the roughing pump, or should I use an angle valve? What is safer?
Regards,
Alfredo
--- In VacuumX@..., "arainho_cl" <aneves@...> wrote:
Vladimir,
I agree with you that the "vacuum" presure is irrelavant as a design parameter in this application. I will try 1/8 since the chamber is bell shaped.
Thanks,
Alfredo
--- In VacuumX@..., Vladimir Chutko <chutko@> wrote:
Yes, I agree regarding the ribs. However I would like to note, that the ultimate vacuum is not important, because for ANY vacuum inside the chamber the pressure difference is NO MORE than 1 atm = 1 bar = 1000 mbar. If your vacuum is 1 mbar, the pressure difference is 1000 mbar - 1 mbar = 999 mbar, if there is 0.0001 mbar inside the chamber, the pressure difference is 1000 mbar - 0.0001 mbar = 999.9999 mbar, if your vacuum is 0.000001 mbar, the pressure difference is 999.999999 mbar, and so on. It is much less then, for instance, in a regular plastic pipe with compressed air, where a regular compressed air pressure is 4 - 6 bar, and pressure difference is 3 - 5 bar. However the forces acting on a chamber depends also on chamber walls surface, so the big chambers may be done of relatively thin metal but must be reinforced with ribs.
The best way is just to have a look on any professionally made chamber with the similar dimensions.
Regards,
Vladimir
o1bigtenor wrote:
On Sat, Aug 21, 2010 at 3:28 PM, Alfredo Rainho <aneves@ <mailto:aneves@>> wrote:
Vladimir,
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save
weight and money.
Regards,
Alfredo
It might be easier to answer the question why is the sky blue - - (really!!!!!!!!!!!).
Your thickness will also depend upon your design parameters (maximum vacuum needed), process(es) used etc.
You can make a bell jar quite thin if you use reinforcing ribs effectively. If you dont want any ribs it will be quite a bit thicker.
So - - over to you - - what are your design parameters and what can you do (or get done) (welding/machining/scrounging etc )?
Darald
------------------------------------
Yahoo! Groups Links
|
Re: Base plate and Chamber
Vladimir,
Is it ok to use ball valve to isolate the diffusion pump from the roughing pump, or should I use an angle valve? What is safer?
Regards,
Alfredo
toggle quoted message
Show quoted text
--- In VacuumX@..., "arainho_cl" <aneves@...> wrote:
Vladimir,
I agree with you that the "vacuum" presure is irrelavant as a design parameter in this application. I will try 1/8 since the chamber is bell shaped.
Thanks,
Alfredo
--- In VacuumX@..., Vladimir Chutko <chutko@> wrote:
Yes, I agree regarding the ribs. However I would like to note, that the
ultimate vacuum is not important, because for ANY vacuum inside the
chamber the pressure difference is NO MORE than 1 atm = 1 bar = 1000
mbar. If your vacuum is 1 mbar, the pressure difference is 1000 mbar - 1
mbar = 999 mbar, if there is 0.0001 mbar inside the chamber, the
pressure difference is 1000 mbar - 0.0001 mbar = 999.9999 mbar, if your
vacuum is 0.000001 mbar, the pressure difference is 999.999999 mbar, and
so on. It is much less then, for instance, in a regular plastic pipe
with compressed air, where a regular compressed air pressure is 4 - 6
bar, and pressure difference is 3 - 5 bar. However the forces acting on
a chamber depends also on chamber walls surface, so the big chambers may
be done of relatively thin metal but must be reinforced with ribs.
The best way is just to have a look on any professionally made chamber
with the similar dimensions.
Regards,
Vladimir
o1bigtenor wrote:
On Sat, Aug 21, 2010 at 3:28 PM, Alfredo Rainho <aneves@
<mailto:aneves@>> wrote:
Vladimir,
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save
weight and money.
Regards,
Alfredo
It might be easier to answer the question ¨why is the sky blue¨ - -
(really!!!!!!!!!!!).
Your thickness will also depend upon your design parameters (maximum
vacuum needed), process(es) used etc.
You can make a bell jar quite thin if you use reinforcing ribs
effectively. If you don?t want any ribs it will be quite a bit thicker.
So - - over to you - - what are your design parameters and what can
you do (or get done) (welding/machining/scrounging etc )?
Darald
|
Re: Base plate and Chamber
Vladimir,
I agree with you that the "vacuum" presure is irrelavant as a design parameter in this application. I will try 1/8 since the chamber is bell shaped.
Thanks,
Alfredo
toggle quoted message
Show quoted text
--- In VacuumX@..., Vladimir Chutko <chutko@...> wrote:
Yes, I agree regarding the ribs. However I would like to note, that the
ultimate vacuum is not important, because for ANY vacuum inside the
chamber the pressure difference is NO MORE than 1 atm = 1 bar = 1000
mbar. If your vacuum is 1 mbar, the pressure difference is 1000 mbar - 1
mbar = 999 mbar, if there is 0.0001 mbar inside the chamber, the
pressure difference is 1000 mbar - 0.0001 mbar = 999.9999 mbar, if your
vacuum is 0.000001 mbar, the pressure difference is 999.999999 mbar, and
so on. It is much less then, for instance, in a regular plastic pipe
with compressed air, where a regular compressed air pressure is 4 - 6
bar, and pressure difference is 3 - 5 bar. However the forces acting on
a chamber depends also on chamber walls surface, so the big chambers may
be done of relatively thin metal but must be reinforced with ribs.
The best way is just to have a look on any professionally made chamber
with the similar dimensions.
Regards,
Vladimir
o1bigtenor wrote:
On Sat, Aug 21, 2010 at 3:28 PM, Alfredo Rainho <aneves@...
<mailto:aneves@...>> wrote:
Vladimir,
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save
weight and money.
Regards,
Alfredo
It might be easier to answer the question ¨why is the sky blue¨ - -
(really!!!!!!!!!!!).
Your thickness will also depend upon your design parameters (maximum
vacuum needed), process(es) used etc.
You can make a bell jar quite thin if you use reinforcing ribs
effectively. If you don?t want any ribs it will be quite a bit thicker.
So - - over to you - - what are your design parameters and what can
you do (or get done) (welding/machining/scrounging etc )?
Darald
|
Re: Base plate and Chamber
Yes, I agree regarding the ribs. However I would like to note, that the ultimate vacuum is not important, because for ANY vacuum inside the chamber the pressure difference is NO MORE than 1 atm = 1 bar = 1000 mbar. If your vacuum is 1 mbar, the pressure difference is 1000 mbar - 1 mbar = 999 mbar, if there is 0.0001 mbar inside the chamber, the pressure difference is 1000 mbar - 0.0001 mbar = 999.9999 mbar, if your vacuum is 0.000001 mbar, the pressure difference is 999.999999 mbar, and so on. It is much less then, for instance, in a regular plastic pipe with compressed air, where a regular compressed air pressure is 4 - 6 bar, and pressure difference is 3 - 5 bar. However the forces acting on a chamber depends also on chamber walls surface, so the big chambers may be done of relatively thin metal but must be reinforced with ribs.
The best way is just to have a look on any professionally made chamber with the similar dimensions.
Regards,
Vladimir
o1bigtenor wrote:
toggle quoted message
Show quoted text
On Sat, Aug 21, 2010 at 3:28 PM, Alfredo Rainho <aneves@... <mailto:aneves@...>> wrote:
Vladimir,
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save
weight and money.
Regards,
Alfredo
It might be easier to answer the question why is the sky blue - - (really!!!!!!!!!!!).
Your thickness will also depend upon your design parameters (maximum vacuum needed), process(es) used etc.
You can make a bell jar quite thin if you use reinforcing ribs effectively. If you dont want any ribs it will be quite a bit thicker.
So - - over to you - - what are your design parameters and what can you do (or get done) (welding/machining/scrounging etc )?
Darald
|
Re: Base plate and Chamber
Alfredo,
The Pyrex bell jars have thickness from 4.8 to 9.5 mm for the range of 10.25"OD x 12"H ... 18"OD x 30"H bell jars, and for the biggest bell jar the thinner (4.8 mm) walls are also meet the standard. For the metal bell jars I can't find wall thickness data and unfortunately do not have any available to measure. I suppose that something like no more then 1/4", and, probably, even 1/8" should be OK.
I couldn't see attached pictures. I see just a kind of a very small point and a small white rectangle.
Best regards,
Vladimir
Alfredo Rainho wrote:
toggle quoted message
Show quoted text
Vladimir,
What thickness can the bell chamber be (not the base plate)? I would like to use the thinnest possible bell jar so I can save weight and money.
Regards,
Alfredo
*From:* VacuumX@... [mailto:VacuumX@...] *On Behalf Of *Vladimir Chutko
*Sent:* Saturday, August 21, 2010 4:07 PM
*To:* VacuumX@...
*Subject:* Re: [VacuumX] Base plate and Chamber
Alfredo,
I guess, you can chrome it at any company providing auto wheels chrome
coating. I think chrome is a good choice due to its very good adhesion
to metals. However later there may be some tricks with coated base plate
because of outgassing, needs to clean it periodically.... sometimes
chrome strips out where it contacts with sealed o-rings.... All depends
on required vacuum and technologies you'll use.
Base plate thickness 1" is a standard baseplate thickness. For 14" bell
jarr you can use 3/4", I guess, but do not forget that practically all
standard baseplate feedthroughs are designed for 1" baseplate.
Regards,
Vladimir Chutko
arainho_cl wrote:
Hi,
I just got an 16" x 1" thick 1020 steel disc (SS was too expensive) for my new base plate. I turned it flat and to prevent rusting I would like to have it chromed. Is there any objections to chroming the base plate. Is chrome or niquel better?
I now want to make a Stainless Steel chamber and have been wondering
what is the minimum thickness I can use for an 14" bell shaped chamber.
Regards and thanks for all the advices,
Alfredo
------------------------------------
Yahoo! Groups Links
|
Re: Base plate and Chamber
On Sat, Aug 21, 2010 at 3:28 PM, Alfredo Rainho <aneves@...> wrote:
Vladimir,
?
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save weight and
money.
?
Regards,
?
Alfredo
It might be easier to answer the question ¨why is the sky blue¨ - - (really!!!!!!!!!!!).
Your thickness will also depend upon your design parameters (maximum vacuum needed), process(es) used etc.
You can make a bell jar quite thin if you use reinforcing ribs effectively. If you don?t want any ribs it will be quite a bit thicker.
So - - over to you - - what are your design parameters and what can you do (or get done) (welding/machining/scrounging etc )?
Darald
|
Re: Base plate and Chamber
Vladimir,
?
What thickness can the bell chamber be (not the base plate)? I
would like to use the thinnest possible bell jar so I can save weight and
money.
?
Regards,
?
Alfredo
?
From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of Vladimir
Chutko
Sent: Saturday, August 21, 2010 4:07 PM
To: VacuumX@...
Subject: Re: [VacuumX] Base plate and Chamber
?
?
Alfredo,
I guess, you can chrome it at any company providing auto wheels chrome
coating. I think chrome is a good choice due to its very good adhesion
to metals. However later there may be some tricks with coated base plate
because of outgassing, needs to clean it periodically.... sometimes
chrome strips out where it contacts with sealed o-rings.... All depends
on required vacuum and technologies you'll use.
Base plate thickness 1" is a standard baseplate thickness. For 14"
bell
jarr you can use 3/4", I guess, but do not forget that practically all
standard baseplate feedthroughs are designed for 1" baseplate.
Regards,
Vladimir Chutko
arainho_cl wrote:
> Hi,
>
> I just got an 16" x 1" thick 1020 steel disc (SS was too
expensive) for my new base plate. I turned it flat and to prevent rusting I
would like to have it chromed. Is there any objections to chroming the base
plate. Is chrome or niquel better?
>
> I now want to make a Stainless Steel chamber and have been wondering what
is the minimum thickness I can use for an 14" bell shaped chamber.
>
> Regards and thanks for all the advices,
>
> Alfredo
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
|
Re: Base plate and Chamber
Alfredo,
I guess, you can chrome it at any company providing auto wheels chrome coating. I think chrome is a good choice due to its very good adhesion to metals. However later there may be some tricks with coated base plate because of outgassing, needs to clean it periodically.... sometimes chrome strips out where it contacts with sealed o-rings.... All depends on required vacuum and technologies you'll use.
Base plate thickness 1" is a standard baseplate thickness. For 14" bell jarr you can use 3/4", I guess, but do not forget that practically all standard baseplate feedthroughs are designed for 1" baseplate.
Regards,
Vladimir Chutko
arainho_cl wrote:
toggle quoted message
Show quoted text
Hi,
I just got an 16" x 1" thick 1020 steel disc (SS was too expensive) for my new base plate. I turned it flat and to prevent rusting I would like to have it chromed. Is there any objections to chroming the base plate. Is chrome or niquel better?
I now want to make a Stainless Steel chamber and have been wondering what is the minimum thickness I can use for an 14" bell shaped chamber.
Regards and thanks for all the advices,
Alfredo
------------------------------------
Yahoo! Groups Links
|
Hi,
I just got an 16" x 1" thick 1020 steel disc (SS was too expensive) for my new base plate. I turned it flat and to prevent rusting I would like to have it chromed. Is there any objections to chroming the base plate. Is chrome or niquel better?
I now want to make a Stainless Steel chamber and have been wondering what is the minimum thickness I can use for an 14" bell shaped chamber.
Regards and thanks for all the advices,
Alfredo
|
Re: Wanted - Deposition Crystal holder
I bough them on eBay...
Ken
toggle quoted message
Show quoted text
--- In VacuumX@..., "arainho_cl" <aneves@...> wrote:
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
|
Re: RF versus DC for Generating Plasma
________________________________________ The most fundamental human right is ownership of your own body. If you may not do with it however you please, you are not yet free. On Thu Aug 19 6:02 , 'Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE]' <andrew.n.aurigema@...> sent: 15 kv AC is a lot easier and cheaper to make.? There are endless
15kv “beer sign” transformers out on Ebay for sale.? 15kv DC is just rectified
AC so you get about the same thing only with the rectifier losses.? Er, something like that. Full-wave rectified DC will be 1.414 X the RMS AV volts, so actually, 15kVDC = 21.2 kV before rectifier losses -- which with modern rectifiers, may be much lower than you might expect. I've noticed that Vf is much lower now than it was in the HV rectifiers of ten or twenty years ago. From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of arainho_cl
Sent: Wednesday, August 18, 2010 10:11 PM
To: VacuumX@...
Subject: [VacuumX] RF versus DC for Generating Plasma
Hi All,
Could some one eligthen me on the difference of using HV DC and RF for plasma
generation. What are the pro and cons of each method.
|
Re: Wanted - Deposition Crystal holder
Alfredo,
For any valves I do not know a better place than eBay. Try also some companies who sell rebuilt vacuum components, PTB-Sales (www.ptbsales.com), Capovani Brs (www.capovani.com), BidService (www.bidservice.com), Vacuum Equipment (www.vacequip.com) for instance; their prices are less than brand new ones.
Best regards,
Vladimir Chutko
arainho_cl wrote:
toggle quoted message
Show quoted text
Vladimir,
Thanks for the info, they are cheaper than ebay! I am revamping my chamber and now need to get some ball valves for foreline, any suggestions on where to get good priced valves besides EBay?
Regards,
Alfredo
--- In VacuumX@..., Vladimir Chutko <chutko@...> wrote:
Alfredo,
Try also Thin Film Supply (www.thinfilmsupply.com.) I use them years, no problems so far.
Best regards,
Vladimir Chutko
arainho_cl wrote:
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@..., "Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]" <andrew.n.aurigema@> wrote:
And your design worked great Ken. Used it about 8 times now and it don't miss a beat. I even cleaned the crystal with some mirror stripper and it still all worked.
Thanks again for the help on the XMS.
Drew in sunny FLA
From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Ken
Sent: Friday, July 09, 2010 10:23 AM
To: VacuumX@...
Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
I have already disposed of my only crystal holders but there is a schematic of a very reliable and easily constructed Oscillator in the files section you can build.
The circuit as shown is for the modified XMS controllers I sent out. You would need to change the circuit of the oscillator by removing the 1mh choke coil and hooking the lead from the top end of the choke to 12vdc from a wall-wart or other source of power.
I made a few circuit boards for this but they are all with the XMS controllers now. Easy enough to breadboard on a small piece of perfboard. The transistors can be any NPN small signal transistor with gain at 10mhz such as the 2N2222A or equiv.
Ken Hunter
--- In VacuumX@...<mailto:VacuumX%40yahoogroups.com>, "achronicity" <achronicity@> wrote:
Greetings,
I am looking for some reasonably priced crystal holders and oscillators for a deposition controller. I see some good info in the files section on crystal holders and oscillators, and while I can machine housings and such pretty easily, I would prefer to just purchase something that already works. If anyone has working sensor heads or oscillators they would part with for a reasonable price, it would save me a lot of time and trial & error. I have been looking on Ebay for awhile now, and I can find the odd oscillator for $100.00 USD (pricey IMO) and I can find deposition crystals cheap, but I have yet to stumble upon any crystal holders.
I recently picked up a nice Leybold IC6000 4 channel deposition controller and it will be arriving soon, so I want to come up with some sensors to try it out - any ideas?
-Achro
------------------------------------
Yahoo! Groups Links
------------------------------------
Yahoo! Groups Links
|
Re: Wanted - Deposition Crystal holder
Vladimir,
Thanks for the info, they are cheaper than ebay! I am revamping my chamber and now need to get some ball valves for foreline, any suggestions on where to get good priced valves besides EBay?
Regards,
Alfredo
toggle quoted message
Show quoted text
--- In VacuumX@..., Vladimir Chutko <chutko@...> wrote:
Alfredo,
Try also Thin Film Supply (www.thinfilmsupply.com.) I use them years,
no problems so far.
Best regards,
Vladimir Chutko
arainho_cl wrote:
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@..., "Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]" <andrew.n.aurigema@> wrote:
And your design worked great Ken. Used it about 8 times now and it don't miss a beat. I even cleaned the crystal with some mirror stripper and it still all worked.
Thanks again for the help on the XMS.
Drew in sunny FLA
From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Ken
Sent: Friday, July 09, 2010 10:23 AM
To: VacuumX@...
Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
I have already disposed of my only crystal holders but there is a schematic of a very reliable and easily constructed Oscillator in the files section you can build.
The circuit as shown is for the modified XMS controllers I sent out. You would need to change the circuit of the oscillator by removing the 1mh choke coil and hooking the lead from the top end of the choke to 12vdc from a wall-wart or other source of power.
I made a few circuit boards for this but they are all with the XMS controllers now. Easy enough to breadboard on a small piece of perfboard. The transistors can be any NPN small signal transistor with gain at 10mhz such as the 2N2222A or equiv.
Ken Hunter
--- In VacuumX@...<mailto:VacuumX%40yahoogroups.com>, "achronicity" <achronicity@> wrote:
Greetings,
I am looking for some reasonably priced crystal holders and oscillators for a deposition controller. I see some good info in the files section on crystal holders and oscillators, and while I can machine housings and such pretty easily, I would prefer to just purchase something that already works. If anyone has working sensor heads or oscillators they would part with for a reasonable price, it would save me a lot of time and trial & error. I have been looking on Ebay for awhile now, and I can find the odd oscillator for $100.00 USD (pricey IMO) and I can find deposition crystals cheap, but I have yet to stumble upon any crystal holders.
I recently picked up a nice Leybold IC6000 4 channel deposition controller and it will be arriving soon, so I want to come up with some sensors to try it out - any ideas?
-Achro
------------------------------------
Yahoo! Groups Links
|
Re: Wanted - Deposition Crystal holder
Yeah I ain't dead yet!
Still trying to make some room so I can get my system up and
running, but it's hard when you've crammed a 50x90' shed's worth of
stuff into a space half that in size!
How's Florida?
Thomas.
On 19/08/2010 10:04 PM, Aurigema, Andrew N. (KSC-ASRC-474)[ASRC
AEROSPACE] wrote:
toggle quoted message
Show quoted text
?
Thomas………. Good to see you still
out there :_)))))))
?
Drew in soggy Florida
?
?
?
Alfredo,
There is a vendor on eBay who has both 5 and 6hz
crystals ()
might not be the cheapest source, but it is one
that is easy to access.
Cheers, Thomas Janstrom.
On 19/08/2010 12:41 PM, arainho_cl wrote:
?
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@...,
"Aurigema, Andrew N. (KSC-ASRC-491)[ASRC
AEROSPACE]"
wrote:
>
> And your design worked great Ken. Used it
about 8 times now and it don't
miss a beat. I even cleaned the crystal with
some mirror stripper and it still
all worked.
>
> Thanks again for the help on the XMS.
>
> Drew in sunny FLA
>
> From: VacuumX@...
[mailto:VacuumX@...]
On Behalf Of Ken
> Sent: Friday, July 09, 2010 10:23 AM
> To: VacuumX@...
> Subject: [VacuumX] Re: Wanted -
Deposition Crystal holder
>
>
>
> I have already disposed of my only
crystal holders but there is a
schematic of a very reliable and easily
constructed Oscillator in the files
section you can build.
>
> The circuit as shown is for the modified
XMS controllers I sent out. You
would need to change the circuit of the
oscillator by removing the 1mh choke
coil and hooking the lead from the top end of
the choke to 12vdc from a
wall-wart or other source of power.
>
> I made a few circuit boards for this but
they are all with the XMS
controllers now. Easy enough to breadboard on
a small piece of perfboard. The
transistors can be any NPN small signal
transistor with gain at 10mhz such as
the 2N2222A or equiv.
>
> Ken Hunter
>
> --- In VacuumX@...,
"achronicity" wrote:
> >
> > Greetings,
> >
> > I am looking for some reasonably
priced crystal holders and
oscillators for a deposition controller. I see
some good info in the files
section on crystal holders and oscillators,
and while I can machine housings
and such pretty easily, I would prefer to just
purchase something that already
works. If anyone has working sensor heads or
oscillators they would part with
for a reasonable price, it would save me a lot
of time and trial & error. I
have been looking on Ebay for awhile now, and
I can find the odd oscillator for
$100.00 USD (pricey IMO) and I can find
deposition crystals cheap, but I have
yet to stumble upon any crystal holders.
> >
> > I recently picked up a nice Leybold
IC6000 4 channel deposition
controller and it will be arriving soon, so I
want to come up with some sensors
to try it out - any ideas?
> >
> > -Achro
> >
>
?
|
Re: Wanted - Deposition Crystal holder
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE]
Thomas………. Good to see you still out there :_)))))))
?
Drew in soggy Florida
?
From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of Thomas
Janstrom
Sent: Wednesday, August 18, 2010 11:19 PM
To: VacuumX@...
Subject: Re: [VacuumX] Re: Wanted - Deposition Crystal holder
?
?
Alfredo,
There is a vendor on eBay who has both 5 and 6hz crystals ()
might not be the cheapest source, but it is one that is easy to access.
Cheers, Thomas Janstrom.
On 19/08/2010 12:41 PM, arainho_cl wrote:
toggle quoted message
Show quoted text
?
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@...,
"Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]" wrote:
>
> And your design worked great Ken. Used it about 8 times now and it don't
miss a beat. I even cleaned the crystal with some mirror stripper and it still
all worked.
>
> Thanks again for the help on the XMS.
>
> Drew in sunny FLA
>
> From: VacuumX@...
[mailto:VacuumX@...]
On Behalf Of Ken
> Sent: Friday, July 09, 2010 10:23 AM
> To: VacuumX@...
> Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
>
>
>
> I have already disposed of my only crystal holders but there is a
schematic of a very reliable and easily constructed Oscillator in the files
section you can build.
>
> The circuit as shown is for the modified XMS controllers I sent out. You
would need to change the circuit of the oscillator by removing the 1mh choke
coil and hooking the lead from the top end of the choke to 12vdc from a
wall-wart or other source of power.
>
> I made a few circuit boards for this but they are all with the XMS
controllers now. Easy enough to breadboard on a small piece of perfboard. The
transistors can be any NPN small signal transistor with gain at 10mhz such as
the 2N2222A or equiv.
>
> Ken Hunter
>
> --- In VacuumX@...,
"achronicity" wrote:
> >
> > Greetings,
> >
> > I am looking for some reasonably priced crystal holders and
oscillators for a deposition controller. I see some good info in the files
section on crystal holders and oscillators, and while I can machine housings
and such pretty easily, I would prefer to just purchase something that already
works. If anyone has working sensor heads or oscillators they would part with
for a reasonable price, it would save me a lot of time and trial & error. I
have been looking on Ebay for awhile now, and I can find the odd oscillator for
$100.00 USD (pricey IMO) and I can find deposition crystals cheap, but I have
yet to stumble upon any crystal holders.
> >
> > I recently picked up a nice Leybold IC6000 4 channel deposition
controller and it will be arriving soon, so I want to come up with some sensors
to try it out - any ideas?
> >
> > -Achro
> >
>
?
|
Re: Wanted - Deposition Crystal holder
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE]
I want to say I just saw some on EBAY in the industrial sales
area under “vacuum deposition” I think
?
If you cant find any, I can send you one to get you going
?
Drew in soggy Florida
?
?
From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of arainho_cl
Sent: Wednesday, August 18, 2010 10:41 PM
To: VacuumX@...
Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
?
?
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@...,
"Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]"
wrote:
>
> And your design worked great Ken. Used it about 8 times now and it don't
miss a beat. I even cleaned the crystal with some mirror stripper and it still
all worked.
>
> Thanks again for the help on the XMS.
>
> Drew in sunny FLA
>
> From: VacuumX@...
[mailto:VacuumX@...]
On Behalf Of Ken
> Sent: Friday, July 09, 2010 10:23 AM
> To: VacuumX@...
> Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
>
>
>
> I have already disposed of my only crystal holders but there is a
schematic of a very reliable and easily constructed Oscillator in the files
section you can build.
>
> The circuit as shown is for the modified XMS controllers I sent out. You
would need to change the circuit of the oscillator by removing the 1mh choke
coil and hooking the lead from the top end of the choke to 12vdc from a
wall-wart or other source of power.
>
> I made a few circuit boards for this but they are all with the XMS
controllers now. Easy enough to breadboard on a small piece of perfboard. The
transistors can be any NPN small signal transistor with gain at 10mhz such as
the 2N2222A or equiv.
>
> Ken Hunter
>
> --- In VacuumX@...,
"achronicity" wrote:
> >
> > Greetings,
> >
> > I am looking for some reasonably priced crystal holders and
oscillators for a deposition controller. I see some good info in the files
section on crystal holders and oscillators, and while I can machine housings
and such pretty easily, I would prefer to just purchase something that already
works. If anyone has working sensor heads or oscillators they would part with
for a reasonable price, it would save me a lot of time and trial & error. I
have been looking on Ebay for awhile now, and I can find the odd oscillator for
$100.00 USD (pricey IMO) and I can find deposition crystals cheap, but I have
yet to stumble upon any crystal holders.
> >
> > I recently picked up a nice Leybold IC6000 4 channel deposition
controller and it will be arriving soon, so I want to come up with some sensors
to try it out - any ideas?
> >
> > -Achro
> >
>
|
Re: RF versus DC for Generating Plasma
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE]
15 kv AC is a lot easier and cheaper to make.? There are endless
15kv “beer sign” transformers out on Ebay for sale.? 15kv DC is just rectified
AC so you get about the same thing only with the rectifier losses.?
?
From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of arainho_cl
Sent: Wednesday, August 18, 2010 10:11 PM
To: VacuumX@...
Subject: [VacuumX] RF versus DC for Generating Plasma
?
?
Hi All,
Could some one eligthen me on the difference of using HV DC and RF for plasma
generation. What are the pro and cons of each method.
Thanks,
Alfredo
|
Re: Wanted - Deposition Crystal holder
Alfredo,
Try also Thin Film Supply (www.thinfilmsupply.com.) I use them years, no problems so far.
Best regards,
Vladimir Chutko
arainho_cl wrote:
toggle quoted message
Show quoted text
Hi Ken,
Who do you buy the crystals from?
Regards,
Alfredo
--- In VacuumX@..., "Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]" <andrew.n.aurigema@...> wrote:
And your design worked great Ken. Used it about 8 times now and it don't miss a beat. I even cleaned the crystal with some mirror stripper and it still all worked.
Thanks again for the help on the XMS.
Drew in sunny FLA
From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Ken
Sent: Friday, July 09, 2010 10:23 AM
To: VacuumX@...
Subject: [VacuumX] Re: Wanted - Deposition Crystal holder
I have already disposed of my only crystal holders but there is a schematic of a very reliable and easily constructed Oscillator in the files section you can build.
The circuit as shown is for the modified XMS controllers I sent out. You would need to change the circuit of the oscillator by removing the 1mh choke coil and hooking the lead from the top end of the choke to 12vdc from a wall-wart or other source of power.
I made a few circuit boards for this but they are all with the XMS controllers now. Easy enough to breadboard on a small piece of perfboard. The transistors can be any NPN small signal transistor with gain at 10mhz such as the 2N2222A or equiv.
Ken Hunter
--- In VacuumX@...<mailto:VacuumX%40yahoogroups.com>, "achronicity" <achronicity@> wrote:
Greetings,
I am looking for some reasonably priced crystal holders and oscillators for a deposition controller. I see some good info in the files section on crystal holders and oscillators, and while I can machine housings and such pretty easily, I would prefer to just purchase something that already works. If anyone has working sensor heads or oscillators they would part with for a reasonable price, it would save me a lot of time and trial & error. I have been looking on Ebay for awhile now, and I can find the odd oscillator for $100.00 USD (pricey IMO) and I can find deposition crystals cheap, but I have yet to stumble upon any crystal holders.
I recently picked up a nice Leybold IC6000 4 channel deposition controller and it will be arriving soon, so I want to come up with some sensors to try it out - any ideas?
-Achro
------------------------------------
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