How much is it?

B


On 5/5/2011 3:26 PM, Vladimir Chutko wrote:

Hi All,

I am in urgent need to sale vacuum chamber: Leybold A700, framed, with
installed gate valve, LN2 trap, two-ways roughing valve, transformer
for resistive evaporators, water and compressed air communications.
Chamber is clean, painted, gate/valve reassembled and cleaned, no visual
defects obtained. Plus some other small staff (feedthroughs, tooling,
etc) available. Plus diffusion pump DIP3000 for that chamber - Leybold
brand produced in Russia, brand new in manufacturer's not opened package
(no oil filled and no heater cartridges installed!).

Picture and more detailed information on request.

Thanks,

Vladimir Chutko

------------------------------------

Yahoo! Groups Links

what is the price

zafar

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To: VacuumX@...
From: chutko@...
Date: Thu, 5 May 2011 13:26:21 -0700
Subject: [VacuumX] Vacuum Chamber for sale

Hi All,

I am in urgent need to sale vacuum chamber: Leybold A700, framed, with
installed gate valve, LN2 trap, two-ways roughing valve, transformer
for resistive evaporators, water and compressed air communications.
Chamber is clean, painted, gate/valve reassembled and cleaned, no visual
defects obtained. Plus some other small staff (feedthroughs, tooling,
etc) available. Plus diffusion pump DIP3000 for that chamber - Leybold
brand produced in Russia, brand new in manufacturer's not opened package
(no oil filled and no heater cartridges installed!).

Picture and more detailed information on request.

Thanks,

Vladimir Chutko

Hi All,

I am in urgent need to sale vacuum chamber: Leybold A700, framed, with
installed gate valve, LN2 trap, two-ways roughing valve, transformer
for resistive evaporators, water and compressed air communications.
Chamber is clean, painted, gate/valve reassembled and cleaned, no visual
defects obtained. Plus some other small staff (feedthroughs, tooling,
etc) available. Plus diffusion pump DIP3000 for that chamber - Leybold
brand produced in Russia, brand new in manufacturer's not opened package
(no oil filled and no heater cartridges installed!).

Picture and more detailed information on request.

Thanks,

Vladimir Chutko

Pics of "baby George" are in the photos section under "Drew in sunny Florida".

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I am trying to figure out about depositing 140 nm on glass .

Please recheck this for me.

I rechecked my measurements, and my arithmetic, and it seems to me that I would need to evaporate 0.044 cm^3 of aluminum to get that thickness, which sounds kinda low.

The distance from my coil to the mirror is 20" or 50cm. The imaginary sphere with that radius has a surface area of 4*pi*r^2 or 31416 square cm.

To a decent first approximation, the thickness Of the coating will equal the volume of the aluminum being vaporized (in cc) divided by the surface area of that sphere.

140 nm is 140e-9 m or 1.4e-5 cm. That thickness times the surface of 3.1416e4 cm^2 gives me a volume of 0.44 cc.

The sg of aluminum is about 2.7g/cc. So that volume of aluminum would weigh about 1.2 grams.

I find by weighing that 7" of my wire weighs (ok, has a mass of) about 4 grams, so 1" would weigh about .6g, which is what I've been using. So my coatings are too thin?

Sent from my iPhone

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I have a sideways flow stationary emitter array that seems to yield good results.? I recently added a digital thickness indicator to my rig so now have actual numbers to put to the thickness.? Using a witness plate, I am just barely able to see the noon day sun thru the coating with about 140 nm of aluminum deposited.? This number is from my digital thickness unit that Ken Hunter built so I got a lot of faith in the number.? ?I deposit about 10 nm per second and run the unit for about 15 seconds.? ?I personally like to put on more aluminum ( like 350 nm ) because I don’t overcoat and thin coatings don’t last as long.? The experts say ? wave of red 550 nm light? ( around 140 nm ) is ideal.? ??

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Hope it helps

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Drew in sunny Florida

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From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Vladimir Chutko
Sent: Wednesday, April 13, 2011 4:05 AM
To: VacuumX@...
Subject: Re: [VacuumX] coating thickness error tolerance

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Hi,

Coating uniformity depends on substrate holder type (single or planetary
rotation), chamber dimensions, evaporator position, coated surface shape
and some other factors. For industrial coating machines with single
rotated substrate holder coating uniformity less than 5% is usually
specified. For machines with substrate holder double planetary rotation
the thickness uniformity about or even less than 1% is available,
sometimes the extra rotating mask is used. However it doesn't mean that
you can obtain so high uniformity for any coating made of any materials.
Uniformity also depends on evaporated material distribution in the
chamber volume which may vary for different materials and during a time
of evaporation. We usually obtain uniformity in mass production of
e-beam evaporated multilayer dielectric coatings (not the thickness but
optical properties, it is close but not the same) less than 2% in the
chamber Dia.72"x72" with double planetary rotating substrate holder and
rotating mask. But not for all coatings, for some of them less than 1%,
for some - about 5%.

Best regards,

Vladimir Chutko

On 4/13/2011 12:06 AM, deepak wrote:
> Hi,
> This is my first post in the group. I want to know the tolerance in thickness variation (in nm) of Aluminium coating, acceptable and expected from professional and amateur coaters.
>
> Mr Jan van Gastel in interferometry group has finished a mirror accurate to<5nm. So I think coating error introduced in 100 nm film thickness would be less than 1 nm. Is such precision achieved routinely by coaters in this group?
> Thanks and with regards,
> Deepak
> Ahmedabad, India
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

?

I have a sideways flow stationary emitter array that seems to yield good results.? I recently added a digital thickness indicator to my rig so now have actual numbers to put to the thickness.? Using a witness plate, I am just barely able to see the noon day sun thru the coating with about 140 nm of aluminum deposited.? This number is from my digital thickness unit that Ken Hunter built so I got a lot of faith in the number.? ?I deposit about 10 nm per second and run the unit for about 15 seconds.? ?I personally like to put on more aluminum ( like 350 nm ) because I don’t overcoat and thin coatings don’t last as long.? The experts say ? wave of red 550 nm light? ( around 140 nm ) is ideal.? ??

?

Hope it helps

?

Drew in sunny Florida

?

From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Vladimir Chutko
Sent: Wednesday, April 13, 2011 4:05 AM
To: VacuumX@...
Subject: Re: [VacuumX] coating thickness error tolerance

?

?

Hi,

Coating uniformity depends on substrate holder type (single or planetary
rotation), chamber dimensions, evaporator position, coated surface shape
and some other factors. For industrial coating machines with single
rotated substrate holder coating uniformity less than 5% is usually
specified. For machines with substrate holder double planetary rotation
the thickness uniformity about or even less than 1% is available,
sometimes the extra rotating mask is used. However it doesn't mean that
you can obtain so high uniformity for any coating made of any materials.
Uniformity also depends on evaporated material distribution in the
chamber volume which may vary for different materials and during a time
of evaporation. We usually obtain uniformity in mass production of
e-beam evaporated multilayer dielectric coatings (not the thickness but
optical properties, it is close but not the same) less than 2% in the
chamber Dia.72"x72" with double planetary rotating substrate holder and
rotating mask. But not for all coatings, for some of them less than 1%,
for some - about 5%.

Best regards,

Vladimir Chutko

On 4/13/2011 12:06 AM, deepak wrote:
> Hi,
> This is my first post in the group. I want to know the tolerance in thickness variation (in nm) of Aluminium coating, acceptable and expected from professional and amateur coaters.
>
> Mr Jan van Gastel in interferometry group has finished a mirror accurate to<5nm. So I think coating error introduced in 100 nm film thickness would be less than 1 nm. Is such precision achieved routinely by coaters in this group?
> Thanks and with regards,
> Deepak
> Ahmedabad, India
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

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