Homebrew PCBs

Sure, that will work, just use acrylic paint thinned with water to the 
proper consistency.

But, setup is a big deal.  Paint the screen with Diazo and let dry in a 
dark room.  Print pattern on transparency.  Expose in sunlight for 1 
minute.  Wash out unexposed Diazo. Mount board and screen and adjust for 
proper spacing.  Put 'ink' in screen and print.  Recover left over 
'ink'.  Clean pattern from screen.
By the time you're done, you've got half a day into it, and some fairly 
pricey chemicals  That's fine if you're doing 30 boards, not so fine if 
you're doing 1.  Personally, I do 1 board, not 30.  I use a board house 
if I'm making a lot of boards.

Kerry


Erik Knise wrote:
> My brother just bought a silk screen setup to do shirts. Has anyone
> ever screen printed onto a circuit board? I figured the only
> difference would be the ink and I would need to build a fixture to
> hold the board. It also looks like it would be nice to hold a frame
> for a solder paste stencil.
>
> On 9/10/09, Piers Goodhew <piers@...> wrote:
>   
>> That, indeed, is the one and only method I've heard of (short of
>> actually silk screening it on).
>>
>> On a 1-layer board you TT the copper side and then TT the components
>> on the top.
>>
>> PG
>>
>> On 11/09/2009, at 3:09 AM, Erik Knise wrote:
>>
>>     
>>> I have heard of some people using toner transfer to etch and then
>>> after they clean off the board and use the toner transfer method again
>>> to "print" the silk screen layer onto the circuit board.
>>>
>>>       
>>
>> ------------------------------------
>>
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>>
>>
>>
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