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. 21, 2004
Filed:
Mar. 20, 2003
Li-Shiun Chen, Hsinchu, TW;
Ming-Ching Chang, Taipei, TW;
Huan-Just Lin, Hsin-Chu, TW;
Li-Te S. Lin, Hsin-Chu, TW;
Yung-Hog Chiu, Taipei, TW;
Hun-Jan Tao, Hsinchu, TW;
Taiwan Semiconductor Manufacturing Co., Ltd, Hsin Chu, TW;
Abstract
A method for compensating CD variations across a semiconductor process wafer surface in a plasma etching process including a semiconductor wafer having a process surface comprising patterned features; carrying out a first plasma etching process wherein the semiconductor wafer is heated to at least two selectively controllable temperature zones; determining a first dimensional variation of etched features with respect to reference dimensions over predetermined areas of the process surface including the two selectively controllable temperature zones; determining operating temperatures for the two selectively controllable temperature zones to achieve a targeted dimensional variation change in the first dimensional variation to achieve a desired second dimensional variation; plasma etching the process surface to the desired operating temperatures; and, determining an actual dimensional variation change for use in at least one subsequent plasma etching process.