Power FET with embedded body pickup
First Claim
1. A power transistor formed on a semiconductor substrate and including a lateral array of polysilicon lines separated by alternating source and drain regions, the power transistor comprising:
- one or more body contact diffusion regions formed in areas of the source regions not receiving the source diffusion, each body contact diffusion region having a length that extends to the edges of the two adjacent polysilicon lines and having a dopant type opposite to the dopant type of the source region; and
one or more body pickup contacts, each body pickup contact formed only over a respective body contact diffusion region.
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Accused Products
Abstract
A power transistor formed on a semiconductor substrate and including a lateral array of polysilicon lines separated by alternating source and drain regions includes one or more body contact diffusion regions formed in the source regions where each body contact diffusion region has a length that extends to the edges of the two adjacent polysilicon lines, and one or more body pickup contacts where each body pickup contact is formed over a respective body contact diffusion region. In one embodiment, the body contact diffusion regions are formed in a fabrication process using ion implantation of dopants of a first type through a body diffusion mask. Each body contact diffusion region defined by an exposed area in the body diffusion mask has a drawn area that overlaps the respective two adjacent polysilicon lines.
13 Citations
11 Claims
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1. A power transistor formed on a semiconductor substrate and including a lateral array of polysilicon lines separated by alternating source and drain regions, the power transistor comprising:
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one or more body contact diffusion regions formed in areas of the source regions not receiving the source diffusion, each body contact diffusion region having a length that extends to the edges of the two adjacent polysilicon lines and having a dopant type opposite to the dopant type of the source region; and
one or more body pickup contacts, each body pickup contact formed only over a respective body contact diffusion region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification