source:Industry News release time:2021-04-27 Article author:Victoria Popular:pcb
As products have higher and higher requirements for functions, ordinary single panels are no longer sufficient to meet the needs of functionalization. What emerged at the historic moment is the double-sided printed pcb circuit board. It means that there are conductive lines on both sides of the circuit board. It is usually made of epoxy glass cloth copper clad laminate. Used in the fields of communication electronic equipment, advanced instruments and meters, high-performance electronic computers, etc. The typical process for manufacturing double-sided plated-hole printed boards is the bare copper-clad solder mask process (SMOBC). The process is as follows:
Double-sided copper clad laminate blanking → composite board CNC drilling through hole inspection, deburring, brush electroless plating (through hole metallization) → (full board electroplating of thin copper) → inspection and cleaning of screen printing negative circuit patterns, curing (dry Film or wet film, exposure, development)→Check and repair circuit pattern plating→Plating tin (anticorrosive nickel/gold)→Remove printing material (photosensitive film)→Etching copper→(Removing tin) and cleaning brush a layer of thermal curing green oil wire Screen printing solder mask pattern (photosensitive dry film or wet film, exposure, development, heat curing, ordinary photosensitive heat) curing and oil recording)-cleaning, drying screen printing marking character graphics, curing-(spray tin or organic solder mask Mold)→shape processing clean, dry, electrical switch test, packaging inspection, finished product delivery.
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