On Fri, 2007-01-12 at 20:47 +1300, David McNab wrote:
> Following this, I etched the board in FeCl as normal, and ended
> up with a near-faultless board. The only fault was a small break
> in one trace, which proved quick and easy to solder-bridge. I
> would like to try more boards, with more passes through the
> laminator - 6-8 instead of 4, and suspect this will give me a
> zero-defect board.
I tried this with a second board - putting thin card over the WashAway
paper when feeding into the laminator, and giving it 8 passes. Result is
a defect-free board.
Attached are 3 small images, of boards under a 200x digital microscope:
∗ gloss-inkjet.jpg - toner transfer via inkjet gloss card
∗ washaway.jpg - toner transfer via washaway paper, fed directly into
laminator
∗ washaway-card.jpg - toner transfer via washaway paper, enclosed in
thin card prior to feeding through laminator
As you can see, the inkjet gloss gives much better resolution, even
sufficient for SMD boards. The WashAway paper gives much uglier toner
transfer, but adequate for simpler boards with larger traces and
through-hole components and taking much less time to create.
Cheers
David
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