Hi,

    we use those mask used by the offset printing industry. They offer
resolution far better than any high res laser printer, plus, one side is
coated with argentum or mercury, making UV 100% unpenetrable

    Just ask any offset printing service provider, i'm sure they are dirt
economy, even compared with high res printer

   and, we successfully scale down to 30um without using any lens. We
actually can get 10um, but the uniformity not that good

keep in contact

Leow
Universiti Teknologi Malaysia

-------Original Message-------

From: mems-talk@memsnet.org
Date: Wednesday, August 21, 2002 19:44:03
To: mems-talk@memsnet.org
Subject: [mems-talk] Laser printer masks

Hi,

i need some cheap masks; the easiest solution we found is using a
laser-printer on overhead foiles. the structure size i can reach with this
is so far limited to be 200microns.

does anybody have experinece how to make structures smaller (without
spending money on a mask) and what brands (models) of transparencies and
printers might be good ? (i aim at a factor of 2 to 4 in structure size)

does anybody know a place where you can buy such really cheap masks with
even better resolution ?


thanks already,

mike
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