Processing method of circuit board and circuit board with contour tolerance of +/-0.05mm
A processing method and circuit board technology, applied in the directions of printed circuits, printed circuit manufacturing, electrical components, etc., can solve problems such as the inability to meet the external tolerances of circuit boards, to ensure continuity and consistency, prolong service life, and easy to obtain materials. Effect
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[0036] Such as Figure 1 to Figure 6 A processing method of a circuit board and a circuit board with a shape tolerance of ±0.05mm are shown. Paste an epoxy resin board with a vacuum channel on a special bakelite board as a backing board. The circuit board is placed on the pins that meet the tolerance requirements. There are at least three pins in the finished SET of each circuit board. Cover the circuit board with tape For the cover plate with milling slots, use a fixed row of pins on the bakelite board, and use a new milling cutter to perform two cycles of milling in the horizontal direction and the vertical direction for each row of the circuit board. Bakelite board: choose the bakelite board made of phenolic resin commonly used in the current circuit board production process, with a thickness of 10mm, and use two pins to fix it in the "one hole and one slot" positioning device on the milling machine table. Epoxy resin board: The ordinary prepreg used in circuit board manuf...
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