Patent ID: 6046429
Filing Date: 2000-04-04
Classification: B23K,H01L,H05K

Abstract:
A method of removing shorts on a dielectric layer, the method comprising the steps of:selecting a laser having a wavelength range wherein the degree of absorption of said dielectric layer is 1-10%;focusing said selected laser from above a top surface of said dielectric layer and substantially on said top surface of said dielectric layer, said dielectric layer being substantially non-transparent to said selected laser wavelength;selectively etching a thin layer of dielectric material from said top surface of said dielectric layer, said laser being attenuated such that said laser is prevented from penetrating the dielectric material with sufficient energy to damage subsurface wiring; andremoving shorts from coplanar wiring on said top surface of said dielectric layer by laser ablation using said selected laser, wherein said selectively etching step is performed subsequent to said removing step.