IP Library Granted Patent US 7,851,872
Granted Patent B2
US 7,851,872 · App. 11/524,113 · Granted Dec 14, 2010

Efficient transistor structure

Assignee: Marvell World Trade Ltd.
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Quick Facts
Patent No.
US 7,851,872
App. No.
11/524,113
Filed
Sep 20, 2006
Granted
Dec 14, 2010
Kind
B2
Art Unit
2822
USPC
257/401
Abstract

An integrated circuit comprises a first source, a first drain, a second source, a first gate arranged between the first source and the first drain, and a second gate arranged between the first drain and the second source. The first and second gates define alternating first and second regions in the drain. The first and second gates are arranged farther apart in the first regions than in the second regions.

Claims (68)

1. An integrated circuit comprising:

a first source;

a first drain;

a second source;

a first gate arranged between said first source and said first drain;

a second gate arranged between said first drain and said second source,

wherein said first and second gates define alternating first and second regions in said drain, wherein said first and second gates are arranged farther apart in said first regions than in said second regions; and

a well substrate contact arranged in said first regions.

2. An integrated circuit comprising:

a first source;

a first drain;

a second source;

a first gate arranged between said first source and said first drain;

a second gate arranged between said first drain and said second source,

wherein said first and second gates define alternating first and second regions in said drain, wherein said first and second gates are arranged farther apart in said first regions than in said second regions; and

R well substrate contacts arranged in said first regions, where R is an integer greater than one.

3. The integrated circuit of claim 2 wherein R is an integer that is greater than three and less than seven.

4. The integrated circuit of claim 1 wherein said integrated circuit includes a plurality of transistors.

5. The integrated circuit of claim 4 wherein said transistors include PMOS transistors.

6. The integrated circuit of claim 2 herein said R well substrate contacts are associated with respective ones of R transistors.

7. An integrated circuit comprising:

a first source;

a first drain;

a second source;

a first gate arranged between said first source and said first drain;

a second gate arranged between said first drain and said second source,

wherein said first and second gates define alternating first and second regions in said drain, wherein said first and second gates are arranged farther apart in said first regions than in said second regions;

a second drain; and

a third gate arranged between said second source and said second drain,

wherein said second and third gates define alternating third and fourth regions, said second and third gates are arranged farther apart in said third regions than in said fourth regions,

wherein said first regions are arranged adjacent to said fourth regions and said second regions are arranged adjacent to said third regions, and

wherein said first and third regions include R well substrate contacts and R is an integer greater than one.

8. A method for providing an integrated circuit comprising:

providing a first source;

providing a first drain;

providing a second source;

locating a first gate between said first source and said first drain;

locating a second gate between said first drain and said second source;

defining alternating first and second regions in said drain using said first and second gates;

arranging said first and second gates farther apart in said first regions than in said second regions; and

locating a well substrate contact in said first regions.

9. A method for providing an integrated circuit comprising:

providing a first source;

providing a first drain;

providing a second source;

locating a first gate between said first source and said first drain;

locating a second gate between said first drain and said second source;

defining alternating first and second regions in said drain using said first and second gates;

arranging said first and second gates farther apart in said first regions than in said second regions; and

locating R well substrate contacts in said first regions, where R is an integer greater than one.

10. The method of claim 9 wherein R is an integer that is greater than three and less than seven.

11. The method of claim 8 wherein said integrated circuit includes a plurality of transistors.

12. The method of claim 11 wherein said transistors include PMOS transistors.

13. The method of claim 9 further comprising associating said R well substrate contacts with respective ones of R transistors.

14. A method for providing an integrated circuit comprising:

providing a first source;

providing a first drain;

providing a second source;

locating a first gate between said first source and said first drain;

locating a second gate between said first drain and said second source;

defining alternating first and second regions in said drain using said first and second gates;

arranging said first and second gates farther apart in said first regions than in said second regions;

providing a second drain;

providing a third gate between said second source and said second drain;

defining alternating third and fourth regions using said second and third gates;

arranging said second and third gates farther apart in said third regions than in said fourth regions; and

arranging said first regions adjacent to said fourth regions and said second regions adjacent to said third regions,

wherein said first and third regions include R well substrate contacts, where R is an integer greater than one.

Assignments (6)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 16, 2020
From: CAVIUM INTERNATIONAL
To: MARVELL ASIA PTE, LTD.
Reel/Frame 053475/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 20, 2020
From: MARVELL INTERNATIONAL LTD.
To: CAVIUM INTERNATIONAL
Reel/Frame 052918/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 29, 2020
From: MARVELL WORLD TRADE LTD.
To: MARVELL INTERNATIONAL LTD.
Reel/Frame 051778/0537 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 19, 2006
From: MARVELL INTERNATIONAL, LTD.
To: MARVELL WORLD TRADE LTD.
Reel/Frame 018409/0959 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 20, 2006
From: MARVELL SEMICONDUCTOR, INC.
To: MARVELL INTERNATIONAL LTD.
Reel/Frame 018324/0176 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 20, 2006
From: SUTARDJA, SEHAT
To: MARVELL SEMICONDUCTOR, INC.
Reel/Frame 018333/0610 →
Continuity (8)
Continuation In Part 1125201000 · Oct 17, 2005
Continuation 1069123700 · Oct 22, 2003
Provisional Application 6082551700 · Sep 13, 2006
Provisional Application 6082435700 · Sep 1, 2006
Provisional Application 6082333200 · Aug 23, 2006
Provisional Application 6082100800 · Aug 1, 2006
Provisional Application 6079856800 · May 8, 2006
Related Publication 20070032063A1 · Feb 8, 2007