Patent ID: 11876131
Assignee: FUJI ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A semiconductor device, comprising:
a semiconductor substrate of a first conductivity type including a semiconductor material having a bandgap that is wider than that of silicon;
a second-conductivity-type region of a second conductivity type provided in a surface layer of a first main surface of the semiconductor substrate;
a barrier metal disposed on the second-conductivity-type region;
an insulated-gate field effect transistor with a trench gate structure, including a base region and a source pad, the base region comprising the second-conductivity-type region, the source pad being electrically connected to the second-conductivity-type region via the barrier metal;
an insulating layer disposed on the semiconductor substrate; and
one or more circuit parts for protecting or controlling the insulated-gate field effect transistor, the one or more circuit parts being provided on the semiconductor substrate and including:
a poly-silicon layer provided on the first main surface of the semiconductor substrate via the insulating layer, and
an electrode pad electrically connected to and in direct contact with the poly-silicon layer, wherein

the source pad is a metal film containing aluminum as a main constituent,
the electrode pad is a metal film containing aluminum as a main constituent, the metal film of the electrode pad being made of a single layer, being in direct contact with the poly-silicon layer and being free of any barrier metal, and
the source pad is apart from the electrode pad in a plan view of the semiconductor device.