Six main category of PCB, OSP PCB Shelf time

PCB is for short of printed circuit board. PCB is the basic element of the electronic industry, are passive electronic components in the electronic components industry. PCB industry is a typical cyclical industry. Since the introduction of foreign advanced technology and equipment, single-sided, double-sided and multilayer boards have achieved rapid development, China PCB industry gradually developed from small to big, especially Shenzhen pcb industry is the most fast developer.

PCB can be divided into a single panel (SSB), double-pane (DSB) and multilayer (MLB); sort by the point of flexibility, PCB can be divided into rigid printed circuit board (RPCB) and a flexible printed circuit board (FPCB). In PCB industry studies, generally in accordance with the basic classification as above, PCB products can be broken down into six main category, single side PCB, double side PCB, conventional multilayer PCB, flexible PCB, HDI (high density interconnection)PCB, IC substrate.

Shelf time of Multilayer PCB is defined by IPC, for example OSP surface treatment, vacuum packaging unopened, within six months, should be used within twenty-four hours after unpack, and this process is under temperature and humidity controlled environment, If the storage time is between 6 month to 1 year, the PCB board should be mounted within 12 hours after unpack, similarly need to control the temperature and humidity during this whole process.