Patent ID: 11929434
Assignee: EMEMORY TECHNOLOGY INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A switch device, comprising:
a substrate;
a first gate structure;
a first well of a first conduction type formed in the substrate and partly under a first side of the first gate structure;
a second gate structure;
a second well of a second conduction type formed in the substrate and under the first gate structure and the second gate structure;
a first doped region of the first conduction type formed in the second well and between a second side of the first gate structure and a first side of the second gate structure; and
a second doped region of the first conduction type formed in the second well and adjacent to a second side of the second gate structure;
wherein the first conduction type and the second conduction type are of different doping polarity;
wherein when the switch device is in a first state:
the substrate and the second well receive a first reference voltage;
the second doped region receives a second reference voltage;
the second gate structure receives a third reference voltage;
the first gate structure receives a first operation voltage; and
the first well receives a second operation voltage; and
wherein an absolute value of a first voltage drop between the second operation voltage and the first reference voltage is greater than an absolute value of a second voltage drop between the first operation voltage and the first reference voltage, the absolute value of the second voltage drop is greater than or equal to an absolute value of a third voltage drop between the third reference voltage and the first reference voltage, the absolute value of the third voltage drop is greater than or equal to an absolute value of a fourth voltage drop between the second reference voltage and the first reference voltage, and the absolute value of the fourth voltage drop is greater than or equal to zero.