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:
Aug. 08, 2000
Filed:
Feb. 17, 1999
Etsuyoshi Kobori, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
Wiring of the Dual-Damascene structure is formed without using the CMP method. As shown in FIG. 1A, oxygen ions are implanted from an upper surface under the condition that the oxygen ions reach a position a little deeper than the thickness t1 of the copper film 11 on the SiO.sub.2 layer 2. Due to the foregoing, as shown in FIG. 1B, the copper film 11 on the SiO.sub.2 layer 2 and the copper films on the upper portions of the first wiring section 18 and the second wiring section 19 are oxidized, and the oxidized layer 13 is formed. Since the dielectric constant of copper oxide is high, the first wiring section 18 and the second wiring section 19 are insulated from each other. Therefore, it is possible to obtain a highly reliable wiring structure easily.