Patent ID: 8546696

Claim:
A printed circuit board having a connection terminal with an outline configured to be inserted into an external connector, the connection terminal comprising: an insulating substrate provided with a first surface and a second surface opposite to the first surface, the insulating substrate including an end surface along the outline normal to an insertion direction of the connection terminal to the external connector; at least one lead wiring layer formed on the first surface of the insulating substrate; an insulating protection film covering the lead wiring layer; at least one lead terminal layer constituting an end portion of the lead wiring layer, the lead terminal layer being formed into a strip, and having an exposed outer surface and an end surface along the outline; a reinforcement body adhered on the second surface of the insulating substrate at a backside position of the lead terminal layer, the reinforcement body having an outer surface; and an adhesive layer adhering the reinforcement body to the insulating substrate, wherein a first distance between the outer surface of the lead terminal layer and the outer surface of the reinforcement body on the outline side is smaller than a second distance between the outer surface of the lead terminal layer and the outer surface of the reinforcement body on the lead wiring layer side, wherein a thickness of the adhesive layer on the outline side is smaller than a thickness of the adhesive layer on the lead wiring layer side, and wherein the difference in adhesive layer thickness defines a relationship that the first distance is smaller than the second distance.