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 -> drilling 1 mm.

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

.Width of tracks 2 mm over the whole surface.