Patent ID: 8591692
Filing Date: 2013-11-26
Classification: H05K,Y10T

Abstract:
1. A method for manufacturing rigid-flexible printed circuit board, comprising: providing a flexible substrate comprising an exposed portion and an attaching portion connecting with the exposed portion; providing an adhesive sheet and a rigid copper clad laminate, the adhesive sheet including an opening corresponding to the exposed portion, the rigid copper clad laminate comprising an insulating layer and a copper layer, the rigid copper clad laminate comprising a product portion corresponding to the attaching portion and an unwanted portion corresponding to the exposed portion; defining a first blind slit in the insulating layer along a boundary between the product portion and the unwanted portion, the first slit being defined in a surface of the insulating layer facing away from the copper layer, a width of the first slit being in the range from 0.1 mm to 0.4 mm; laminating the rigid copper clad laminate, the adhesive sheet and the flexible substrate together, the adhesive sheet superposed on the attaching portion of the flexible substrate, the insulating layer adjoining the adhesive sheet, the unwanted portion of the rigid copper clad laminate superposed on the exposed portion of the flexible substrate; forming an outer circuit in the copper layer; defining a second slit in the rigid copper clad laminate along the boundary between the product portion and the unwanted portion, the second slit being in communication with the first slit, a width of the first slit being larger than that of the second slit, a width of the second slit being in the range from 0.1 mm to 0.2 mm; and removing the unwanted portion of the rigid copper clad laminate to expose the exposed portion of the flexible substrate, thus obtaining a rigid-flexible printed circuit board.