Laser trimming of resistors
First Claim
1. A method for laser trimming resistors, the method comprising:
- measuring a resistance value for resistors of a set of resistors that are formed during manufacture of a circuit platform;
sorting the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor;
assigning a laser trim file to bins 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
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.
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Accused Products
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.
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Citations
31 Claims
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1. A method for laser trimming resistors, the method comprising:
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measuring a resistance value for resistors of a set of resistors that are formed during manufacture of a circuit platform;
sorting the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor;
assigning a laser trim file to bins 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
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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for laser trimming resistors, the system comprising:
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a tester configured to measure a resistance value for resistors of a set of resistors that are formed during manufacture of a circuit platform;
a trim application configured to;
sort the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor, and assign a laser trim file to each bin based on a predictive trim formulation to conform each resistor with their respective target value; and
a laser drill configured to trim the 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;
wherein the laser trim file further defines a trim pattern on the resistor to form a planar channel within the resistor. - View Dependent Claims (19, 20, 21, 22)
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23. A computer program product comprising:
a computer usable medium having computer readable program code embodied therein, the computer readable program code comprising;
computer readable program code that receives a resistance value for resistors of a set of resistors that are formed during manufacture of a circuit platform;
computer readable program code that sorts the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor;
computer readable program code that assigns 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
computer readable program code that outputs, for uploading to the laser drill, a file having assignment of the respective resistors to respective laser trim files. - View Dependent Claims (24, 25, 26, 27)
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28. A computer software tool for use in laser trimming comprising:
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a library of laser trim files, each laser trim file defining a set of configuration parameters for a laser drill to conform resistors with their respective target values;
a computer usable medium having computer readable program code embodied therein, the computer readable program code comprising;
computer readable program code that receives a resistance value for resistors of a set of resistors that are formed during manufacture of a circuit platform;
computer readable program code that sorts the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor;
computer readable program code that assigns a laser trim file from the library to each bin based on a predictive trim formulation; and
computer readable program code that outputs, for uploading to the laser drill, a file having assignment of the respective resistors to respective laser trim files. - View Dependent Claims (29, 30, 31)
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Specification