Description
The material used in PCB from top to bottom includes Silkscreen, Soldermask, Copper and Substrate. The last of those layers, substrate, is made of fiberglass and is also known as FR4, with the FR letters standing for “fire retardant.” and is 80 x 55mm in lenght.







Return Measuring Tape Stanley
Nose Circlip Plier
Needle Nose Plier
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