Patent ID: 11950357
Assignee: AVARY HOLDING (SHENZHEN) CO., LIMITED.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The method of claim 4, wherein a method for manufacturing the first circuit board comprises:
providing a first copper-clad laminate, the first copper-clad laminate comprising a first copper foil layer, the first base layer, and a second copper foil layer stack in that order;
defining at least one first blind hole in the first copper-clad laminate, each first blind hole penetrating the first copper foil layer and the first base layer;
forming a first conductive portion in each first blind hole by electroplating;
etching the first copper foil layer and the second copper foil layer to form the first conductive wiring layer and the second conductive wiring layer, respectively, causing the first conductive wiring layer and the second conductive wiring layer to electrically connect to each other through the first conductive portion.