Patent ID: 7158663
Filing Date: 2007-01-02
Classification: G01N,G06T,Y10T

Abstract:
1. A method for obtaining confidence measure of a ball grid array (BGA) model having a plurality of balls in semiconductor surface mounted devices, the method comprising the steps of: extracting BGA images from a surface mounted device having a BGA component; building a BGA ball model and a BGA body model, the BGA ball model having geographic information of the BGA balls and the BGA body model having geographic information of the BGA body; generating a first confidence measure of the BGA ball model wherein the first confidence measure includes a first standard deviation of the BGA ball model and a first local image contrast of each BGA ball; and generating a second confidence measure of the BGA body model wherein the second confidence measure includes a second standard deviation of the BGA body model and a second local image contrast of the BGA body.