Patent ID: 11935945
Assignee: FUJI ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A semiconductor device, comprising:
a semiconductor substrate provided with an N-type region with N-type conductivity, wherein
the N-type region is a region including a center position in a depth direction of the semiconductor substrate;
the N-type region includes an acceptor with a concentration that is a lower concentration than a carrier concentration, and is 0.001 times or more of a carrier concentration at the center position; and
the N-type region comprises:
a concentration peak of a hydrogen chemical concentration; and
a region where another concentration peak of the hydrogen chemical concentration is not provided over a range of 40% or more of a thickness of the semiconductor substrate, in a direction toward the center position of the semiconductor substrate from the concentration peak.