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06-13
2022
views:45
Pcb plate commonly used raw materials are mainly: substrate, copper foil, PP, photosensitive material, anti-welding paint and substrate, etc.
2022-06-13 45views
06-13
2022
views:43
1、FR-4 A flame resistant material grade code, represents the resin material must be able to burn a material specification, it is not a material name
2022-06-13 43views
06-13
2022
views:31
The requirement of upper pad for PCB drilling is: certain surface hardness to prevent the surface burr of drilling. But it can't be too hard and wear off the bit.
2022-06-13 31views
06-13
2022
views:29
One, what is coated aluminum plate coated aluminum plate is on the surface of the aluminum plate covered with a layer of PVC, PET film, usually there are two kinds of single coated plate.
2022-06-13 29views
06-13
2022
views:25
PCB entry/backup boards were born almost at the same time as PCB in the 1940s and 1950s.At the beginning, the phenolic resin cover plate was used
2022-06-13 25views