Patent ID: 7164815

Claim:
A manufacturing method of an optical waveguide that includes a first clad layer, a core section for transmitting an optical signal, the core section being formed on the first clad layer, a second clad layer formed on the first clad layer covering the core section, a first mirror for reflecting the optical signal emitted by a luminous source, and leading the optical signal to the core section, and a second mirror for reflecting the optical signal transmitted through the core section, and leading the optical signal to an optical receiver, wherein the optical waveguide is connected to a substrate through the first clad layer, the manufacturing method comprising: a clad layer and core section formation process of laminating the first clad layer, the core section, and the second clad layer one by one on the substrate; a slot formation process of forming a first slot that divides the core section from the side of the second clad layer, and a second slot that divide the core section from the side of the second clad layer at a position apart from the first slot; and a mirror formation process of forming the first mirror at the first slot, and the second mirror at the second slot by forming a metal film in the first slot and the second; and a metal film removal process of removing, using a dicer, a first metal film that is a part of the metal film formed by the mirror formation process performed in the first slot, the part being in the core section on the side of the second slot, and a second metal film that is a part of the metal film formed by the mirror formation process performed in the second slot, the part being in the core section on the side of the first slot.