Atul A Patel

US Patent:

6940038, Sep 6, 2005

Filed:

Jun 3, 2003

Appl. No.:

10/454253

Inventors:

Nicholas Biunno - Santa Clara CA, US
Atul Patel - Fremont CA, US
Ken Ogle - Los Gatos CA, US
George Dudnikov - San Jose CA, US

Assignee:

Sanmina-SCI Corporation - San Jose CA

International Classification:

B23K026/38

US Classification:

21912169, 21912168, 700166

Abstract:

Improved systems and methods for laser trimming resistors printed on a substrate layer are provided. An exemplary embodiment measures a resistance value for each annular resistor and sorts the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each resistor with their respective target value. The laser drill uses the laser trim files to trim the resistors within each bin in accordance with the laser trim file assigned to that bin.

US Patent:

6972391, Dec 6, 2005

Filed:

Nov 21, 2002

Appl. No.:

10/302099

Inventors:

Nicholas Biunno - Santa Clara CA, US
Atul Patel - Fremont CA, US
Ken Ogle - Los Gatos CA, US
George Dudnikov - San Jose CA, US

Assignee:

HADCO Santa Clara, Inc. - Santa Clara CA

International Classification:

B23K026/38

US Classification:

21912169, 21912168, 700166

Abstract:

Improved systems and methods for laser trimming annular resistors printed on a circuit board are provided. An exemplary embodiment measures a resistance value for each annular resistor and sorts the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each annular resistor with their respective target value. The laser drill uses laser trim files to trim the annular resistors within each bin in accordance with a laser trim file assigned to that bin.

US Patent:

7297896, Nov 20, 2007

Filed:

Oct 19, 2005

Appl. No.:

11/254253

Inventors:

Nicholas Biunno - Santa Clara CA, US
Atul Patel - Fremont CA, US
Ken Ogle - Los Gatos CA, US
George Dudnikov - San Jose CA, US

Assignee:

HADCO Santa Clara, Inc. - San Jose CA

International Classification:

B23K 26/38
G06F 19/00

US Classification:

21912169, 21912168, 700166

Abstract:

Improved systems and methods for laser trimming resistors are provided. An exemplary embodiment measures a resistance value for each resistor and sorts the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each resistor with their respective target value. The laser drill uses the laser trim files to trim the resistors within each bin in accordance with the laser trim file assigned to that bin.

US Patent:

7329831, Feb 12, 2008

Filed:

Mar 29, 2005

Appl. No.:

11/094003

Inventors:

Nicholas Biunno - Santa Clara CA, US
Atul Patel - Fremont CA, US
Ken Ogle - Los Gatos CA, US
George Dudnikov - San Jose CA, US

Assignee:

HADCO Santa Clara, Inc. - San Jose CA

International Classification:

B23K 26/38

US Classification:

21912169, 21912168, 700166

Abstract:

Improved systems and methods for laser trimming resistors printed on a substrate layer are provided. An exemplary embodiment measures a resistance value for each annular resistor and sorts the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each resistor with their respective target value. The laser drill uses the laser trim files to trim the resistors within each bin in accordance with the laser trim file assigned to that bin.

US Patent:

8048319, Nov 1, 2011

Filed:

Sep 28, 2009

Appl. No.:

12/568327

Inventors:

James Aaron Smith - Lilburn GA, US
Atul Harihar Patel - Acworth GA, US

Assignee:

Enercon Services, Inc. - Tulsa OK

International Classification:

G21C 15/18
B01D 29/13

US Classification:

210767, 21016701, 210196, 210251, 210315, 2104161, 210484, 210489, 210499, 210232, 376282, 376313

Abstract:

A filter medium for strainers used in the emergency sump of a nuclear power plant ECCS. The filter medium is employed with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between two concentric strainer walls, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core. The filter medium is inserted through the bottom of the strainer module and is held in place by an x-shaped retainer. The filter creates varied approach velocity of the fluid and results in non-uniform fibrous debris accumulation on the strainer, insuring acceptable strainer debris hydraulic head loss.

US Patent:

20070084782, Apr 19, 2007

Filed:

Oct 5, 2005

Appl. No.:

11/243637

Inventors:

James Smith - Lilburn GA, US
Atul Patel - Acworth GA, US
Louis Carr - Madison AL, US

International Classification:

B01D 25/00

US Classification:

210323200

Abstract:

A filter medium for strainers used in the emergency sump of a nuclear power plant ECCS. The filter medium is employed with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between an external and an internal strainer of a double wall, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core. The filter medium is inserted through the bottom of the strainer module and is held in place by an x-shaped retainer.