Jon Elson wrote:
This stuff isn't that hard to do yourself, even, if you have a way to
make the master films. I make solder paste stencils this way. I use
.003" brass shim stock, and laminate dry film photoresist to both sides.
I make mirror-image films with a photoplotter and align them to each other.
I then slip the sensitized brass between the films and expose both sides
to UV from the filtered black light bulbs. Develop the photoresist in
sodium carbonate and then etch with ferric chloride in a double-sided
spray etcher. I've gotten down to .010" apertures or thereabouts.
--This sounds fascinating. I'd looove to see a photo essay of you
doing this. Got any links??


--
"Steamboat Ed" Haas : Steel, Stainless, Titanium:
Hacking the Trailing Edge! : Guaranteed Uncertified Welding!
www.nmpproducts.com
---Decks a-wash in a sea of words---