This photo resist was coated on the copper-clad boards. Finally, the board was fabricated with the finished photo mask which was photo lithographically reproduced onto a photo resist. Mylar sheets had per-printed and non-reproducing grid points which was an assistance to the board designer. Self-adhesive tape was used for creating the copper traces. The solder pads used to be laid out on the Mylar manually.The copper lines were routed to connect the pads. printed circuit board Before going to Best Free PCB design software aware what does PCB stand for? Schematic circuit used to be drawn on a plain paper. Before not many years, PCB s used to be designed manually with the help of a photo mask on a Mylar sheet. This article with talk about the 5 Best Free PCB design software’s in the market today.
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