Method for machining PCB with step groove
A PCB board and processing technology technology, which is applied in the field of PCB board processing technology with stepped grooves, can solve problems such as easy delamination and peeling, poor welding, poor etching, etc., to reduce product scrapping, improve product quality, and increase contact area. Effect
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[0035] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0036] see image 3 and Figure 4 , the present invention has the PCB board processing method of step groove and comprises the following steps:
[0037] A. The production of PCB inner substrate;
[0038] B. Press the substrate to form a PCB board;
[0039] C. Mill a stepped groove 20 of a certain depth on the PCB formed after lamination;
[0040] D. Carry out laser drilling on the surface of the stepped groove 20, and drill a plurality of blind holes 21;
[0041] E, sinking copper on the surface of the PCB (including the surface of the stepped groove 20 and the two side walls of the blind hole 21);
[0042] F, carry out thickening electroplating to the PCB board after sinking copper in the step E;
[0043] G. Carry out outer layer gr...
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