CEM-1 is a composite material consisting of sheets of woven glass fabric and a core of paper associated with an epoxy resin.

It is very common in the PCB industry and has replaced bakelite (phenolic paper) by having a better temperature resistance.

Punching of CEM1 is easy; it has excellent electrical properties and good flexural strength.

.Drilled at 2.54 mm pitch

.Ø -> 1 mm hole.

.Square pads 2 mm each side.

.Gap of 0,54 mm on the whole surface.