Patent ID: 6127069
Filing Date: 2000-10-03
Classification: G03F,H05K,Y10S

Abstract:
A method of visually inspecting positioning of a pattern on a substrate and/or the size of a pattern on a substrate comprising:a) providing a patterned substrate to be inspected;b) placing thereon a mask having a pattern corresponding to the pattern of the substrate to be inspected made by the method comprising:i) providing a transparent substrate which is substantially unaffected by a laser beam;ii) forming an opaque mask pattern forming layer having a thickness of about 10 .ANG. to 5000 .ANG. on the substrate, the mask pattern forming layer being a material which absorbs the laser beam;iii) exposing the layered substrate to the laser beam in a predetermined pattern to etch the desired mask pattern in the mask pattern forming layer; andc) visually inspecting said patterned substrate using said mask.