Well, 1.1mm was just too small :) Never got it to work. Oh well, it was a long shot by hand for sure.
So I redid it for a "bigger " sensor device. Also, I am playing with a soldermask technique I found at www.diyaudio.com. It uses a glass paint called Vitrea 160. The image above I painted it with a narrow drush and avoided the pads. Then let it dry for a day and baked it to fuse the paint.
It's a work in progress as I'm not fomd of the "blobiness" of the paint. Trying to get the glass paint smooth is proving a challenge. I want the paint to flow and level out, but it doesn't. I may have to buy some of the thinner to see how that goes.
This last image shows a test I did using Press-N-Peel blue to mask the pads. I then painted over everything, baked it, and then used acetone to remove the mask (and paint on top. Worked really well, just need to improve my PNP blue techie as the mask smeared (due to too high heat and pressure I'm sure).
Jay
