SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
0 Assignments
0 Petitions
Accused Products
Abstract
Diffusion regions having the same conductivity type are arranged on a side of a second wiring and a side of a third wiring, respectively under a first wiring connected to a signal terminal. Diffusion regions are separated in a whole part or one part of a range in a Y direction. That is, under first wiring, diffusion regions are only formed in parts opposed to diffusion regions formed under the second wiring and third wiring connected to a power supply terminal or a ground terminal, and a diffusion region is not formed in a central part in an X direction. Therefore, terminal capacity of the signal terminal can be reduced without causing ESD resistance to be reduced, in an ESD protection circuit with the signal terminal.
0 Citations
35 Claims
-
1-19. -19. (canceled)
-
20. A semiconductor integrated circuit device having an ESD (Electro Static Discharge) protection circuit, wherein:
-
the ESD protection circuit comprises; a first wiring extending in a first direction and electrically connected to a first terminal; a second wiring and a third wiring extending in the first direction, electrically connected to a second terminal, and disposed on both sides of the first wiring respectively; a fourth wiring extending in the first direction and electrically connected to the first terminal; a fifth wiring extending in the first direction and electrically connected to the second terminal; a first diffusion region and a second diffusion region that are connected to and formed under the first wiring, having a same first conductivity type with each other, disposed between the second wiring and the third wiring, in a second direction perpendicular to the first direction, the first and second diffusion regions being at least partially separated from each other; a third diffusion region connected to and formed under the second wiring, having a second conductivity type, and disposed so as to be opposed to the first diffusion region in the second direction; a fourth diffusion region connected to and formed under the third wiring, having the second conductivity type, and disposed so as to be opposed to the second diffusion region in the second direction; a fifth diffusion region and a sixth diffusion region that are connected to and formed under the fourth wiring, having the first conductivity type, disposed between the third wiring and the fifth wiring in the second direction, the fifth and sixth diffusion regions being at least partially separated from each other; and a seventh diffusion region connected to and formed under the fifth wiring, having the second conductivity type, and disposed so as to be opposed to the sixth diffusion region in the second direction, the third diffusion region, the first diffusion region, the second diffusion region, the fourth diffusion region, the fifth diffusion region, the sixth diffusion region and the seventh diffusion region are disposed in this order in the second direction, the second wiring, the first wiring, the third wiring, the fourth wiring and the fifth wiring are disposed in this order in the second direction, and the first conductivity type is different from the second conductivity type. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
Specification