Patent ID: 11942545
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A semiconductor device comprising:
a substrate;
a first electrode;
a second electrode; the first electrode provided between the substrate and the second electrode;
an oxide semiconductor layer provided between the first electrode and the second electrode, the oxide semiconductor layer being in contact with the first electrode, the oxide semiconductor layer containing zinc (Zn) and at least one first element selected from the group consisting of indium (In), gallium (Ga), silicon (Si), aluminum (Al), and tin (Sn), and a chemical composition of the oxide semiconductor layer being different from a chemical composition of the first electrode and the second electrode;
a conductive layer provided between the oxide semiconductor layer and the second electrode, the conductive layer being in contact with the second electrode, the conductive layer containing oxygen (O) and at least one second element selected from the group consisting of indium (In), gallium (Ga), silicon (Si), aluminum (Al), tin (Sn), zinc (Zn), and titanium (Ti), and a chemical composition of the conductive layer being different from a chemical composition of the first electrode, the second electrode, and the oxide semiconductor layer;
a gate electrode;
a gate insulating layer provided between the oxide semiconductor layer and the gate electrode; and
a capacitor electrically connected to the first electrode,
wherein
the gate insulating layer includes a first region and a second region, the oxide semiconductor layer provided between the first region and the second region, and,
in a cross-section parallel to a first direction from the first electrode toward the second electrode and including the oxide semiconductor layer, a first distance between the first region and the second region in a second direction perpendicular to the first direction at a first position is smaller than a second distance between the first region and the second region in the second direction at a second position, a distance between the first electrode and the second position in the first direction is greater than a distance between the first electrode and the first position in the first direction.