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:
Jan. 10, 2012
Filed:
Oct. 22, 2008
Applicant:
Kevin W. Mccullen, Essex Junction, VT (US);
Inventor:
Kevin W. McCullen, Essex Junction, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01); G03F 1/00 (2006.01); G03C 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of laying out features for alternating aperture phase shift masks. The method includes defining features on a grid of a uniform basic pitch, orienting the features such that those of the features defined, at least in part, by phase shifting shapes are oriented along a primary direction, and spacing two features terminating adjacent one another such that the two features have space between them sufficient to prevent phase conflicts if both of the two features are defined, at least in part, by phase shifting shapes.