Patent ID: 11923451
Assignee: FUJI ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A semiconductor device comprising an output-stage element and a detection element that detects a current of the output-stage element,
each of the output-stage element and the detection element comprising:
a drift region of a first conductivity-type;
a channel-formation region of a second conductivity-type deposited at an upper part of the drift region;
a main electrode region of the first conductivity-type deposited at an upper part of the channel-formation region; and
a gate electrode buried via a gate insulating film in one or more first trenches in contact with the main electrode region, the channel-formation region, and the drift region,

wherein the first trenches used in common with the detection element and the output-stage element extend in parallel to each other in a planar pattern,
at least one second trench extending in a direction perpendicular to an extending direction of the first trenches intersects with at least the two first trenches among the first trenches so as to separate the channel-formation region of the output-stage element and the channel-formation region of the detection element from each other in the planar pattern,
the output-stage element is located only on one side of the detection element in a longitudinal direction of the first trenches.