Patent ID: 11973116
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The device according to claim 1, wherein
the transistor includes a first electrode, a second electrode, a third electrode, and an insulating portion,
a stacking direction from the first electrode toward the second electrode crosses a plane including the first direction and the second direction,
at least a part of the operating region is between the first electrode and the third electrode in the stacking direction,
the operating region includes
a first semiconductor region of a first conductivity type,
a second semiconductor region of a second conductivity type, and
a third semiconductor region of the first conductivity type,

the first semiconductor region includes a first semiconductor portion and a second semiconductor portion,
a direction from the second semiconductor portion toward the third electrode is along the stacking direction,
a crossing direction from the second semiconductor portion toward the first semiconductor portion crosses the stacking direction,
a direction from the first semiconductor portion toward the third semiconductor region is along the stacking direction,
the second semiconductor region includes a third semiconductor portion and a fourth semiconductor portion,
the third semiconductor portion is between the first semiconductor portion and the third semiconductor region in the stacking direction,
the fourth semiconductor portion is between a part of the second semiconductor portion and the third semiconductor region in the crossing direction,
the first electrode is electrically connected with the first semiconductor region,
the second electrode is electrically connected with the third semiconductor region, and
at least a part of the insulating portion is between the second semiconductor portion and the third electrode and between the fourth semiconductor portion and the third electrode.