Compact rigid-flexible printed circuit board and method for manufacturing same

摘要

A compact rigid-flexible board includes two flexible PCBs, two rigid substrates, a third trace layer and a fourth trace layer. The first flexible PCB includes a first depressing portion, a first exposed portion and a third depressing portion, and a separated second exposed portion. The second flexible PCB includes fourth and fifth depressing portions, and a second exposed portion. The first rigid substrate includes sixth, seventh, and eighth depressing portions. The second rigid substrate includes ninth and tenth depressing portions. The third trace layer, the sixth, first, fourth, and ninth depressing portions and the fourth trace layer are stacked in sequence. The third trace layer, the seven, second, fifth, and tenth depressing portions, and the fourth trace layer are stacked in sequence. The third trace layer and the eighth and third depressing portions are stacked in sequence.

主权项

1. A method for manufacturing a rigid-flexible printed circuit board (PCB), comprising:
providing a first flexible PCB, the first flexible PCB comprising a first exposed portion, a first depressing portion, a second depressing portion, a third depressing portion, and a first unwanted portion, the first depressing portion, the first exposed portion, the third depressing portion, the first unwanted portion, and the second depressing portion being arranged in sequence along a lengthwise direction of the first flexible PCB; providing a second flexible PCB, the second flexible PCB comprising a fourth depressing portion corresponding to the first depressing portion, a fifth depressing portion corresponding to the second depressing portion and a second exposed portion arranged between the fourth depressing portion and the fifth fourth depressing portion; adhering the first depressing portion to the fourth depressing portion, adhering the second depressing portion to the fifth depressing portion, and aligning the first exposed portion, the third depressing portion, and the first unwanted portion with the second exposed portion; laminating a first semi-curable glue piece and a first copper foil layer on the first flexible PCB in sequence, laminating a second semi-curable glue piece and a second copper foil layer on the second flexible PCB in sequence, heating and pressing to solidifying the first curable glue piece and the second curable glue piece to obtain a first rigid substrate and a second rigid substrate; selectively etching the first copper foil layer and the second copper foil layer to obtain a third trace layer and a fourth trace layer; and removing the first rigid substrate and the first copper layer at the first exposed portion and the first unwanted portion, the first unwanted portion, the second rigid substrate and the second copper layer at the second exposed portion, to obtain the rigid-flexible PCB.