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CEM1 PCB Composite epoxy materials (CEM) are a group of composite materials typically made from woven glass fabric surfaces and non-woven glass core combined with epoxy synthetic resin. They are typically used in printed circuit boards.
There are different types of CEMs:CEM1 material is for single side pcb only, it is the better than FR1 and FR2 material, is low-cost, flame-retardant, cellulose-paper-based laminate with only one layer of woven glass fabric.
CEM3 is a new material replace to FR4, because the production cost will cheaper, it is normal use to 2 layer PCB, Its color is white, and it is flame-retardant.
Material /Laminate: CEM 1
Board thickness: 2.0mm
Copper weight: 1/1/1/1oz
Finishing: HAL Lead free