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FAQ 2018-05-09T17:57:03+00:00
  • Silicon wafer under a microscope

We manufacture photomasks and custom patterned optics for commerical, military and university applications.

Our Frequently Asked Questions (FAQ) page is updated regularly based on customer feedback. Please check back often.

Are you able to process 200mm wafers in your facilities? 2018-01-16T00:07:17+00:00

Yes, we have the capability to work with 200 millimeter wafers.

Can I place multiple units on a metal sheet and cut them out? 2018-01-10T20:58:45+00:00

Photo Sciences can place multiple units on a sheet and remove them to provide individual units.

Can Photo Sciences manufacture deposition/shadow masks in stainless steel? 2018-01-16T00:08:33+00:00

At this time Photo Sciences does not have a stainless steel process. This is due to lack of demand.

Can you build glass in circular shapes? 2018-01-16T01:04:44+00:00

Yes. Our glass shaping team can core drill inner and outer diameters. We can also create inside cuts, angles and radiuses. For simple square or rectangle products we use our dicing saw technology.

Can you process .1mm glass? (as thin as paper) 2018-01-11T20:36:05+00:00

Currently, we do not have the equipment and tooling to work with .1 millimeter glass.

Do you accept other data formats than; DWG, GDS, DXF? 2018-01-16T00:06:01+00:00

We also accept raster and vector files. In addition, we can work from drawings, sketches and simple descriptions. Currently, we are working on the upload site to allow a larger variety of formats.

Do you have any tips/techniques for placing a shadow mask on top of the silicon substrate and clamping it down without a lot of scraping between the mask and substrate? 2018-04-12T23:43:35+00:00

Typically, a pin alignment fixture is used and often made by the customer, but Photo Sciences can facilitate the process.

Do you offer sputtered ITO? 2018-01-15T23:58:04+00:00

At this time, we do not have a process for sputtered ITO. This is due to lack of demand.

How long does it take to get my photomask? 2018-01-16T00:07:43+00:00

A 4 to 6-inch chrome mask will ship 48 hours after plots are approved and payment is received. 8-inch and iron oxide will ship in 72 hours.

I’m looking to fabricate some shadow masks to use in an electron-beam evaporator. I heard that the smallest opening you can achieve is 25µm. What about the spacing between the openings? Can they be made at 100µm? 2018-04-12T23:46:01+00:00

The standard feature size, or opening, is 20 microns. Tightened feature sizes can be 10 microns or better, depending on the data provided.

Is the shipping included in the mask price? 2018-01-16T00:06:43+00:00

Shipping is an additional cost which is determined by the customer.

What is a PCM? 2018-01-15T23:46:31+00:00

PCM means process control monitor. This is a test pattern that we place along the edge of every mask. It contains several designs that allow us to quickly verify that the equipment and process remains within the required parameters.

What is the difference between, Iron Oxide, Quartz and Soda Lime? 2018-05-09T19:10:15+00:00
There are several types of glass used for precision printing, the main types are:
  • Sodalime: Basically it’s window pane glass and cheap.
  • Borosilicate: Optical Glass – This is a common type of material for optical components.
  • Quartz: Generally used for UV photomask applications.
What kind of software would you suggest to design photomasks? 2018-06-22T14:29:23+00:00

Klayoutklayout.de (It’s free)  A good layout tool but not a great editor but lots of strong features under the hood.

On the higher end… DW2000 from Designworkshop (Canada).

When will I get my quote? 2018-01-10T21:08:02+00:00

We will send you a formal quote within a couple of hours or within a couple of hours of the next business day.

Which substrates can Indium Tin Oxide (ITO) be patterned on? 2018-06-08T20:34:00+00:00

Which substrates can Indium Tin Oxide (ITO) be patterned on?

  • We can apply ITO to most hard surface subsrates (Glass, Si, Alumnia, etc…).

What is the range of thickness for these substrates considered max/min?

  • The common substrate thicknesses are 0.300mm – 0.250” .

Does Photo Sciences do small-scale orders?

  • Yes we do small scale orders.
Why would I choose a quartz substrate for my photomask? 2018-05-14T15:29:32+00:00
Quartz has better UV optical properties and a lower TCE (Thermal coefficient of expansion), but it’s also expensive.
Why would I choose a soda lime substrate for my photomask? 2018-05-14T15:31:03+00:00

It’s cheap and readily available and works great in the VIS range.

Why would I choose an iron oxide coating for my photomask? 2018-05-14T15:35:08+00:00
Iron oxide is opaque to UV wavelength but transparent in the VIS range, which allows one to see through it to aid in alignment.

Wondering if our customized micro-lithography solutions are a good fit for your organization?