Oxide semiconductor transistor and manufacturing method thereof
First Claim
1. An oxide semiconductor transistor, comprising:
- an oxide semiconductor channel layer;
a metal gate disposed on the oxide semiconductor channel layer;
a gate insulation layer disposed between the metal gate and the oxide semiconductor channel layer;
an internal electrode disposed between the gate insulation layer and the metal gate;
a ferroelectric material layer disposed between the internal electrode and the metal gate; and
a spacer disposed on the oxide semiconductor channel layer, wherein a trench surrounded by the spacer is formed above the oxide semiconductor channel layer, the ferroelectric material layer is disposed in the trench, and the metal gate is disposed outside the trench.
1 Assignment
0 Petitions
Accused Products
Abstract
An oxide semiconductor transistor includes an oxide semiconductor channel layer, a metal gate, a gate insulation layer, an internal electrode, and a ferroelectric material layer. The metal gate is disposed on the oxide semiconductor channel layer. The gate insulation layer is disposed between the metal gate and the oxide semiconductor channel layer. The internal electrode is disposed between the gate insulation layer and the metal gate. The ferroelectric material layer is disposed between the internal electrode and the metal gate. The ferroelectric material layer in the oxide semiconductor transistor of the present invention is used to enhance the electrical characteristics of the oxide semiconductor transistor.
30 Citations
13 Claims
-
1. An oxide semiconductor transistor, comprising:
-
an oxide semiconductor channel layer; a metal gate disposed on the oxide semiconductor channel layer; a gate insulation layer disposed between the metal gate and the oxide semiconductor channel layer; an internal electrode disposed between the gate insulation layer and the metal gate; a ferroelectric material layer disposed between the internal electrode and the metal gate; and a spacer disposed on the oxide semiconductor channel layer, wherein a trench surrounded by the spacer is formed above the oxide semiconductor channel layer, the ferroelectric material layer is disposed in the trench, and the metal gate is disposed outside the trench. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A manufacturing method of an oxide semiconductor transistor, comprising:
-
forming a gate insulation layer on an oxide semiconductor channel layer; forming an internal electrode on the gate insulation layer; forming a ferroelectric material layer on the internal electrode; forming a metal gate on the ferroelectric material layer, wherein at least a part of the ferroelectric material layer is disposed between the metal gate and the internal electrode; and forming a spacer on the oxide semiconductor channel layer before the step of forming the ferroelectric material layer, wherein a trench surrounded by the spacer is formed above the oxide semiconductor channel layer, and the metal gate is formed outside the trench. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
Specification