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:
Dec. 23, 2014
Filed:
Dec. 23, 2010
Cheng-han Wu, Taichung, TW;
Chun-chi Yu, Taipei, TW;
Cheng-Han Wu, Taichung, TW;
Chun-Chi Yu, Taipei, TW;
United Microelectronics Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
The present invention provides a method of forming via holes. First, a substrate is provided. A plurality of first areas is defined on the substrate. A dielectric layer and a blocking layer are formed on the substrate. A patterned photoresist layer is formed on the blocking layer. The patterned photoresist layer includes a plurality of holes arranged in a regular array wherein the area of the hole array is greater than those of the first areas. The blocking layer in the first areas is removed by using the patterned photoresist layer as a mask. Lastly, the dielectric layer is patterned to form at least a via hole in the dielectric layer in the first area.