US 12,439,510 B1
Easy-to-assemble large-current composite circuit board and manufacturing process therefor
Yan Zhao, Guangdong (CN); Yinghao Fu, Guangdong (CN); and Ning Shi, Guangdong (CN)
Filed by Guangdong EREVO Electrical Technology Co., Ltd, Guangdong (CN)
Filed on Jul. 11, 2025, as Appl. No. 19/266,214.
Claims priority of application No. 202410924751.6 (CN), filed on Jul. 11, 2024.
Int. Cl. H05K 1/02 (2006.01); H05K 3/28 (2006.01)
CPC H05K 1/0265 (2013.01) [H05K 3/28 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An easy-to-assemble large-current composite circuit board, comprising a base plate assembly, wherein the base plate assembly consists of an outer shell, an insulating board, a composite circuit board and an insulating packaging layer in turn from top to bottom; the composite circuit board is provided with insulating grooves and mounting holes for conducting electricity; and through holes corresponding to the positions of the mounting holes are formed in the outer shell and the insulating board;
the composite circuit board is made by stacking and pressing a metal layer, an adhesive layer and a polymer material insulating layer in turn, and the insulating grooves and the mounting holes are formed in the metal layer by milling and thinning processing;
the metal layer is made of a pure copper plate, a copper alloy plate or an aluminum alloy plate, the material used for the adhesive layer is prepreg, the thickness of the metal layer is 0.2 mm to 3 mm, the thickness of the polymer material insulating layer is 0.5 mm to 5 mm, and the total thickness of the composite circuit board is 0.9 mm to 8.2 mm;
circuit symbols and related information are printed on the formed outer shell;
the easy-to-assemble large-current composite circuit board further comprising: conductive posts, wherein each of the conductive posts consists of an upper end portion and a lower end portion, the diameter of the lower end portion is less than that of the upper end portion, the lower end portion of the conductive post sequentially passes through the through holes of the outer shell and the insulating plate and the mounting hole of the composite circuit board to be fixedly installed on the base plate assembly, and an upper end face of the upper end portion of the conductive post is provided with an internally threaded hole extending from top to bottom; and
components and connecting wires, wherein the components are installed on the base plate assembly, and the connecting wires have one ends connected and fixed to the components and the other ends installed in the internally threaded holes of the conductive posts by means of conductive screws; the circuit board being applicable to electrical boxes or electrical cabinets.