Patent ID: 9690046
Date: 2017-06-27
CPC Classifications: G02B

Claim:
1. A method for producing an optical circuit board, the method comprising: preparing a wiring board comprising a lower insulating layer on the upper surface of which a lower-laver wiring conductor is deposited by a plating method, and an upper insulating layer on the upper surface of which an upper-laver wiring conductor is deposited by a plating method, and which is laminated on an upper surface of the lower insulating layer; disposing an optical waveguide on an upper surface of the wiring board, and the optical waveguide comprising a lower clad laver, an upper clad layer and a core sandwiched between the lower clad layer and the upper clad layer; and irradiating a laser beam obliquely from above the optical waveguide to divide the core, thereby forming a reflection surface to the core; wherein in preparing the wiring board, a metal layer comprising copper and having a thickness of 10 to 15 μm is formed, simultaneously with the wiring conductor by the plating method, in a region where an irradiating axis of the laser beam and an upper surface of the upper insulating layer intersect, thereby preventing the laser beam from reaching below the upper insulating layer.