Laser trimming of resistors
First Claim
1. A system for laser trimming annular resistors printed on a circuit board, the system comprising:
- a tester having means for measuring a resistance value for each annular resistor;
a trim application having;
means for sorting the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor; and
means for assigning a laser trim file to each bin based on a predictive trim formulation to conform each annular resistor with their respective target value; and
a laser drill having means for trimming the annular resistors within each bin in accordance with the laser trim file assigned to that bin, each laser trim file defining a set of configuration parameters for the laser drill.
3 Assignments
0 Petitions
Accused Products
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.
-
Citations
14 Claims
-
1. A system for laser trimming annular resistors printed on a circuit board, the system comprising:
-
a tester having means for measuring a resistance value for each annular resistor; a trim application having; means for sorting the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor; and means for assigning a laser trim file to each bin based on a predictive trim formulation to conform each annular resistor with their respective target value; and a laser drill having means for trimming the annular resistors within each bin in accordance with the laser trim file assigned to that bin, each laser trim file defining a set of configuration parameters for the laser drill. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for laser trimming resistors, the method comprising:
-
a step of measuring a resistance value for each resistor of a set of resistors on a circuit substrate layer; a step of sorting the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor; a step of assigning a laser trim file to each bin based on a predictive trim formulation, each laser trim file defining a set of configuration parameters for a laser drill to conform each resistor with their respective target value; and a step of using the laser drill to trim the resistors within each bin in accordance with the laser trim file assigned to that bin; wherein the laser trim file further defines a drill pattern on the resistor to form a planar channel within the resistor. - View Dependent Claims (10, 11, 12)
-
-
13. A computer program product comprising:
-
a computer usable medium having computer readable program code embodied therein, the computer readable program code comprising; means for receiving a resistance value for each resistor of a set of resistors on a circuit substrate layer; means for sorting the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor; means for assigning a laser trim file to each bin based on a predictive trim formulation, each laser trim file defining a set of configuration parameters for a laser drill to conform each resistor with their respective target value; and means for outputting, for uploading to the laser drill, a file having assignment of the respective resistors to respective laser trim files. - View Dependent Claims (14)
-
Specification