what the difference in pcb material FR-1 FR-2, FR-4, CM-1,CM-3
hello,i meet a problem when do lead free trial, the pcb can not bear the high temperature, its material is fr-1,the supplier tell me cm-1 or cm-3 can meet the demand.
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yanchen18 (威望:0) (云南 ) 其它行业 主管
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