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

Claim 0:
1. 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, and
a plurality of second trenches extending in parallel to each other in a direction perpendicular to an extending direction of the first trenches intersect with at least the two first trenches among the first trenches and interpose the detection element in the planar pattern 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.