Noise-isolated buried resistor

Details Noise-isolated buried resistor Noise-isolated buried resistor

1997-02-24

1999-03-16

Walberg, Teresa

Electrical resistors

With base extending along resistance element

Resistance element mounted in a groove in base

357 51, H01C 102

Patent

active

058835660

ABSTRACT:
A noise-isolated buried resistor satisfies the requirements for low-noise analog designs requiring well controlled ohmic resistors. A field shield is provided between the buried resistor and the substrate to isolate the buried resistor from the substrate noise. This is accomplished by using the standard buried resistor layout and mask sequence with two exceptions. First, the buried resistor is placed in an N-well region, rather than simply a P-well region. Second, a boron implant is added through the buried resistor mask to provide a P-well inside the N-well to isolate the buried resistor electrically from the N-well. The N-well may then be electrically connected to a "quiet" ground. The P-well inside of the N-well may be left floating.

REFERENCES:
patent: 3386865 (1968-06-01), Doo et al.
patent: 3534234 (1970-10-01), Clevenger et al.
patent: 3966577 (1976-06-01), Hochberg et al.
patent: 3970486 (1976-07-01), Kooi et al.
patent: 4212083 (1980-07-01), Rao
patent: 4228450 (1980-10-01), Anantha et al.
patent: 4316319 (1982-02-01), Anatha et al.
patent: 4418469 (1983-12-01), Fujita
patent: 4672584 (1987-06-01), Tsuji et al.
patent: 4725810 (1988-02-01), Foroni et al.
patent: 4786880 (1988-11-01), Voorman
patent: 4868537 (1989-09-01), Blanchard et al.
patent: 5073508 (1991-12-01), Villalon
patent: 5200733 (1993-04-01), Davis et al.
patent: 5352994 (1994-10-01), Black et al.
patent: 5440162 (1995-08-01), Worley et al.
patent: 5506528 (1996-04-01), Cao et al.
patent: 5729043 (1998-03-01), Shepard et al.

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