Method for adjusting an electronic part template
AssigneeMotorola, Inc.
InventorKevin L. Kent
Life of this patent
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Abstract
A method for adjusting an electronic part template corresponding to an electronic part that is to be placed on a substrate includes capturing an image of the electronic part, calculating a dimension of the electronic part from the image, and adjusting the electronic part template according to the dimension. This dynamic adjustment of the electronic part template helps to reduce excessive rejection rates due to slight mechanical differences among functionally equivalent electronic parts supplied by different suppliers.
Claims11
A method for adjusting an electronic part template corresponding to an electronic part, the electronic part for placement on a substrate, the method comprising the steps of:
- loading the electronic part template corresponding to the electronic part, the electronic part template having a plurality of dimensions;
- generating a tolerance window based on the plurality of dimensions of the electronic part template;
- capturing an image of the electronic part;
- determining overlap of the image and the tolerance window;
- accepting the electronic part when no overlap is determined;
- calculating at least one dimension of the electronic part from the image;
- adjusting the electronic part template according to the at least one dimension;
- and
- discarding the electronic part when overlap is determined.
A method for adjusting an electronic part template corresponding to an electronic part, the electronic part for placement on a substrate, the method comprising the steps of:
- capturing an image of the electronic part;
- detecting, in the image, a predetermined number of points along edges of the electronic part, wherein the step of detecting, in the image, a predetermined number of points further comprises the steps of:
- approximating a center of the electronic part in the image;
- translating from the center in a first direction along a first axis for a first distance to a first edge of the electronic part in the image;
- generating a first target window at the first edge;
- generating a first best fit line along the first edge in the first target window;
- and
- detecting a first one of the predetermined number of points at a first midpoint of the first best fit line;
- calculating at least one dimension of the electronic part from the image by imposing a plurality of line segments between at least some of said predetermined number of points;
- and
- adjusting the electronic part template according to the at least one dimension.
A method for adjusting an electronic part template corresponding to an electronic part, the electronic part for placement on a substrate, the method comprising the steps of:
- capturing an image of the electronic part;
- detecting, in the image a predetermined number of points along edges of the electronic part;
- calculating at least one dimension of the electronic part from the image by imposing a plurality of line segments between at least some of said predetermined number of points;and
- adjusting the electronic part template according to the at least one dimension.
Dependencies are inferred from the claim text.