ESD protection device in high voltage and manufacturing method for the same
AssigneeMediatek Inc.
InventorsDing-Jeng Yu, Tao Cheng, Chao-Chih Chiu
Life of this patent
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Abstract
An ESD protection device comprises a substrate of a first conductive type; a transistor formed in the substrate having an input terminal of the first conductive type, a control terminal of a second conductive type, and a ground terminal of the first conductive type; and a diode formed in the substrate having a first terminal of the first conductive type and a second terminal of the second conductive type, wherein the input terminal and the second terminal are coupled to an input, and the ground terminal and the first terminal are coupled to a ground.
Claims11
An ESD protection device protecting an inner circuit from an electrostatic discharge by providing an ESD path from an input to a ground, the ESD protection device comprises:
- a substrate of a first conductive type;
- a transistor formed in the substrate having an input terminal of the first conductive type, a control terminal of a second conductive type, and a ground terminal of the first conductive type, wherein the input terminal directly connects to the input, the control terminal directly connects to the input or the ground, and the ground terminal directly connects to the ground;
- and
- a diode formed in the substrate having a first terminal of the first conductive type and a second terminal of the second conductive type, wherein the first terminal directly connects to the ground and the second terminal directly connects to the input.
An ESD protection device protecting an inner circuit from an electrostatic discharge by providing an ESD path from an input to a ground, the ESD protection device comprises:
- a substrate of a first conductive type;
- a transistor formed in the substrate having an input terminal of the first conductive type, a control terminal of a second conductive type, and a ground terminal of the first conductive type, wherein the input terminal directly connects to the input, the control terminal is floating, and the ground terminal directly connects to the ground;
- and
- a diode formed in the substrate having a first terminal of the first conductive type and a second terminal of the second conductive type, wherein the first terminal directly connects to the ground and the second terminal directly connects to the input.
An ESD protection device protecting an inner circuit from an electrostatic discharge by providing an ESD path from an input to a ground, the ESD protection device comprises:
- a substrate of a first conductivity type;
- a plurality of lightly doped first wells of a first conductivity type and a plurality of lightly doped second wells of a second conductivity type, wherein the first well and the second well are interleaved formed in the substrate;
- a plurality of first terminals having heavily doped impurity of the first conductivity type formed in the first wells;
- a second terminal having heavily doped impurity of the first conductivity type formed in the second well in a first region of the substrate;
- and
- a third terminal having heavily doped impurity of the second conductivity type formed in the second well in a second region of the substrate;
- wherein the first terminals are coupled to the ground, the second terminal and the third terminal are coupled to the input, and the second well in the first region is floating or directly connects to the ground or the input.
Dependencies are inferred from the claim text.