Patent ID: 9104113
Filing Date: 2015-08-11
Classification: G03F

Abstract:
1. A method of lithographically exposing an extreme ultraviolet (EUV) photoresist layer, said method comprising: providing an lithography apparatus comprising a vacuum enclosure that contains an EUV source configured to emit an EUV beam, an EUV mask that includes lithographic patterns and is positioned in a path of said EUV beam such that after passing through said EUV mask a patterned EUV beam containing said lithographic patterns is formed, and a set of lenses configured to focus said patterned EUV beam to provide a focused patterned EUV beam; disposing a substrate with an EUV photoresist layer thereupon on an electrically conductive chuck located in said vacuum enclosure; disposing a conductive plate with a hole therein above said EUV photoresist layer, wherein said hole is configured to allow said focused patterned EUV beam to pass through so as to impinge directly onto said EUV photoresist layer; and lithographically exposing said EUV photoresist layer at a dose that enables lithographic development of said EUV photoresist layer by irradiating portions of said EUV photoresist layer with said focused patterned EUV beam that passes through said hole in said conductive plate while an electrical field is applied across said conductive plate and said conductive chuck.