Patent ID: 6218281
Filing Date: 2001-04-17
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:preparing a semiconductor substrate having a principal surface, an exposed pad made of conductive material being formed in a partial area of the principal surface, and the other area of the principal surface being covered with the first insulating film;forming a base conductive film on the first insulating film and the pad;forming a photoresist film on the base conducive film by coating photoresist source liquid having a viscosity of 3000 to 4000 cps on the base conductive film, the photoresist film having a thickness of 50 .mu.m or thicker and made of material having a transitivity of 90% or higher relative to an ultraviolet ray having a wavelength of 436 nm when the photoresist film has a thickness of 200 .mu.m;forming an opening through the photoresist film in an area corresponding to the pad to expose a partial surface area of the base conductive film;depositing a conductive bump electrode on the base conductive film exposed on a bottom of the opening; andremoving the photoresist film,wherein said bump electrode depositing step deposits the bump electrode so that an upper surface of the bump electrode is lower than an upper surface of the photoresist film.