shadow masks information
nmehenti at stanford.edu
Wed Aug 27 12:25:16 PDT 2003
So I got some responses from my shadow mask inquiry, and I thought I'd just
send out some useful information about it.
After contacting a few vendors about their shadow mask services, there seem
to be two that are promising:
1. Photo Etch Technology (www.stencil.com) 978-805-5050
They make their shadow masks in stainless steel, and the masks are 2-25 mil
thick (50-625 microns). They define their features either through chemical
etching (if feature is >4 mil), or laser cutting. As for data preparation,
most drawing formats are accepted, and if you have a simple geometry or
array, a hand drawing with dimensions is acceptable as well. A 15x15 inch
steel patterned sheet can cost in the ballpark of $250 if it is chemically
etched. (Yes, so you can get about 16 masks from this one sheet).
2. Photo Sciences 408-748-7673
This company charges a bit more, but can do a better job if you need
smaller features. For features over 5 mil, they use stainless steel. But
for smaller features (a few microns), they can make fine edges by using a
bimetal Ni/Be-Cu mask, but the structural integrity of the mask then
becomes a concern. They take all drawing formats, but may charge for data
conversion. A 4x4 inch mask made in stainless steel can cost about $500.
Roger Horstman is the guy to talk to at this company, he is very helpful.
Hope this helps those who were interested,
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