Patent ID: 6664183
Filing Date: 2003-12-16
Classification: C23C,G03F,H01L

Abstract:
A method of forming a shadow mask comprising:preparing a support layer having enough mechanical strength necessary for forming a predetermined hole therein; forming on said support layer a stopper layer to be an etching stopper while forming said hole in said support layer; forming a surface layer on said stopper layer; etching a predetermined area of said support layer until said stopper layer is exposed to form said hole; removing said stopper layer exposed through bottom of said hole; etching said surface layer exposed through the bottom of said hole so as to have a predetermined thickness to form a tapered portion which is broadened toward said support layer from said surface layer; and forming at the bottom of said hole a through hole whose diameter is smaller than that of the bottom of said hole to form an opening which comprises said tapered portion and a projected portion which is a part of said surface layer projecting toward the center of said tapered portion.