Atul P 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.