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| (PCB) printed circuit board production, pink ring, broken hole definition? |
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Pink ring refers to a circuit board copper inner layer is separated and subjected to chemical pharmaceutically because erosion, the surface of the inner plate blackening treatment removed the pink color rendering, because the structure of the circuit board, the edge of the through-hole perforated ring structure, when the pink area beyond the scope of eyelets, on the circuit board of the finished product can be seen around the pink area around eyelets, this phenomenon is known as pink ring, as it will affect the future trust to the circuit board degree, the majority is not to be accepted. there are differences in the extent of the so-called hole on the break, some tiny holes to break the circuit board is not sufficient to constitute a reliability problem, it is a phenomenon within the pore structure of the board is not localized copper If the pink ring is often happened so-called annular hole broken, so the hole will form basically broken circuit phenomenon, mostly during electrical testing can detect it. acceptance hole broken, mainly depends on manufacturers and user requirements for the degree of hole quality, the majority of users are expecting no hole broken, but the majority of consumer products, if the problem is not high reliability, small holes will accept a partial break, but the acceptance of the specifications and not uniform.
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