Patent ID: 8580068

Claim:
A method for manufacturing a rigid-flexible printed circuit board, comprising: attaching a first rigid substrate to a first adhesive layer, the first rigid substrate comprising a first laminating portion and a first unwanted portion; removing the first unwanted portion and a portion of the first adhesive layer overlaid by the first unwanted portion, thereby defining a first opening through the combined first rigid substrate and the first adhesive layer; laminating the first rigid substrate to a flexible substrate after removing the first unwanted portion and a portion of the first adhesive layer overlaid by the first unwanted portion, the flexible substrate comprising an exposed portion exposed via the first opening and a second laminating portion overlaid by the first laminating portion; attaching a second rigid substrate to a second adhesive layer, the second rigid substrate comprising a third laminating portion and a second unwanted portion, a glass transition temperature of the second adhesive layer being lower than that of the first adhesive layer; removing the second unwanted portion and a portion of the second adhesive layer overlaid by the second unwanted portion, thereby defining a second opening through the combined second rigid substrate and the second adhesive layer; and laminating the second rigid substrate to the flexible substrate in such a manner that the flexible substrate is sandwiched between the first and second adhesive layers, the second laminating portion is sandwiched between the first and the third laminating portions, the first and second openings are aligned with each other, the exposed portion is exposed in the first and the second openings after removing the second unwanted portion and a portion of the second adhesive layer overlaid by the second unwanted portion and after laminating the first rigid substrate to a flexible substrate, obtaining the rigid-flexible printed circuit board, the first, second and third laminating portions cooperatively serving as a rigid region of the rigid-flexible printed circuit board, the exposed portion serving as a flexible region of the rigid-flexible printed circuit board wherein the step of compressing of the first stacked substrate includes an initially-pressing stage, a main-pressing stage succeeding to the initially-pressing stage, and a cold-pressing stage succeeding to the main-pressing stage, the pressure applied on the first stacked substrate in the main-pressing stage is larger than that in the initially-pressing stage, and a time period of the main-pressing stage is longer than that of the initially-pressing stage, the pressure applied on the first stacked substrate in the main-pressing stage is larger than that in the cold-pressing stage, and the time period of the main-pressing stage is longer than that of the cold-pressing stage.