Patent ID: 11876062
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device in which main current flows in a thickness direction of a semiconductor substrate, wherein
the semiconductor substrate includes:
an active region in which the main current flows; and
a terminal region located on an outer side of the active region,
the semiconductor device includes:
a first main electrode provided on the active region;
a second main electrode provided on an opposite side of the semiconductor substrate from the first main electrode;
a protection film covering at least the terminal region; and
a non-electrolytic plating layer provided on the first main electrode not covered by the protection film,
the first main electrode includes a center electrode in a center part and an outer peripheral electrode provided along the center electrode to be separately from the center electrode,
the protection film is provided to extend from the terminal region to an end edge portion of the outer peripheral electrode,
the center electrode and the outer peripheral electrode include:
a first metal layer; and
a second metal layer including aluminum provided on the first metal layer, and
at least the outer peripheral electrode includes a hole part passing through the second metal layer to reach the first metal layer.