Patent ID: 7359068
Filing Date: 2008-04-15
Classification: G01B

Abstract:
1. A method of determining a height and/or position of at least one element on an area array device, comprising: directing a laser beam having a first laser beam intensity at the surface of the at least one element; sampling light reflected from the at least one element, the reflected light resulting from the laser beam having the first laser beam intensity; directing a laser beam having a second laser intensity at the at least one element, the second laser intensity being different than the first laser intensity; sampling light reflected from the at least one element, the reflected light resulting from the laser beam having the second laser intensity; and determining at least one of a position and a height of the at least one element as a function of the sampled reflected light resulting from the laser beam having the first laser beam intensity and the sampled reflected light resulting from the laser beam having the second laser beam intensity.