The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2009
Filed:
Jan. 03, 2006
Gi-sung Yoon, Gyeonggi-do, KR;
In-kyun Shin, Gyeonggi-do, KR;
Sung-hyuck Kim, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
An embodiment of a method of fabricating a chrome-less phase shift mask includes forming a hard mask film on a surface of a mask body having a trench circuit area and a mesa circuit area. The hard mask film is patterned. The mask body is anisotropically etched using the hard mask pattern as an etching mask to form pre-pitting patterns in the trench circuit area. The hard mask film having the hard mask pattern is again patterned to form a mesa hard mask pattern on the mesa circuit area and to expose a top surface of the trench circuit area. The mask body is anisotropically etched to form phase shift hillock patterns in the mesa circuit area and phase shift pitting patterns in the trench circuit area. Phase shift pitting patterns and phase shift hillock patterns may be formed on a single body.