PCB UV exposure time calibration board

Usually getting the right exposure time for you PCBs(Printed Circuit Boards) is really hard, and I had a board fail on me recently because I switched my transparent medium( The thing I use to press the transparencies onto the blank PCB ) from a glass plate to acrylic sheets. Before, I found my exposure time just right¬†ranging from 9-14 mins, but after using the same exposure time on acrylic sheet mediums the board came out as a disaster because the photo resist didn’t hold. Here is a picture of the failure:

DRSSTC Board Failure

Read More