Patent ID: 11929590
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 5:
6. A method for producing optical semiconductor device for producing an optical semiconductor device that is provided with one optical semiconductor chip in which at least one optical element is formed in a semiconductor substrate and that is provided with an extended wire pattern that is connected to a first electrode and a second electrode of the optical element and that extends outside the optical semiconductor chip, the method comprising:
an optical element forming step; and
an extended wire pattern forming step,
the optical element forming step being a step of forming the optical element in which the first electrode and the second electrode are disposed on a front surface side of the optical semiconductor chip and in which a passivation layer having openings to expose a part of the first electrode and a part of the second electrode is formed,
the extended wire pattern forming step being a step in which the extended wire pattern is formed on a front surface of the passivation layer or at a position apart from the front surface of the passivation layer,
wherein
the extended wire pattern forming step includes:
a first metal layer forming step in which a first metal layer connected to the first electrode and the second electrode is formed; and
a second metal layer forming step in which a second metal layer is formed on a front surface of the first metal layer by plating using the first metal layer formed in the first metal layer forming step as a power supply layer, and
wherein the extended wire pattern extends outside only from one end side of the optical semiconductor chip;
in the optical element forming step, a plurality of chip regions in which the optical semiconductor chips are formed are arranged on the semiconductor substrate; and
in at least two chip regions adjacent to each other, the optical elements are formed such that extended wire arrangement ends each being one end of the optical semiconductor chip in which the extended wire pattern extends outward face each other.