Laser trimming of annular passive components
First Claim
1. A method for laser trimming annular resistors printed on a circuit board, the method comprising:
- measuring a resistance value for each annular resistor;
sorting the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor;
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 annular resistor with their respective target value; and
using the laser drill to trim the annular resistors within each bin in accordance with the laser trim file assigned to that bin.
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Accused Products
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.
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Citations
14 Claims
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1. A method for laser trimming annular resistors printed on a circuit board, the method comprising:
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measuring a resistance value for each annular resistor;
sorting the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor;
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 annular resistor with their respective target value; and
using the laser drill to trim the annular resistors within each bin in accordance with the laser trim file assigned to that bin. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for laser trimming annular resistors printed on a circuit board, the system comprising:
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a tester configured to measure a resistance value for each annular resistor;
a trim application configured to;
sort the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor; and
assign 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 configured to trim 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 (9, 10, 11, 14)
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- 12. The system of claim 12, wherein the laser trim application is further configured to adjust the laser trim file associated with the particular bin based on a distribution of the measured resistance values of the trimmed annular resistors within the particular bin.
Specification