Patent ID: 7471381

Claim:
A method of dynamically imaging, calibrating and measuring bump height and coplanarity of a plurality of bumps on a surface, the method comprising: a) illuminating the plurality of bumps with multispectral light from at least one light source such that light of a first wavelength of the multispectral light is reflected off the plurality of bumps at a first angle from the surface and light of a second wavelength of the multispectral light is reflected off the plurality of bumps at a second angle from the surface; b) guiding reflected light of the first wavelength to an imaging device; c) capturing a top view image of at least a portion of the plurality of bumps with the imaging device using the reflected light of the first wavelength received by the imaging device; d) guiding reflected light of the second wavelength to the imaging device; e) capturing at least one oblique side view image of at least a portion of the plurality of bumps with the imaging device using the reflected light of the second wavelength received by the imaging device; and f) processing the captured images to determine absolute bump height and coplanarity.