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:
Nov. 24, 2015
Filed:
Mar. 13, 2014
Kabushiki Kaisha Toshiba, Minato-ku, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
A semiconductor device includes a first contact plug, a diametric dimension of an upper end portion thereof greater than the lower end portion thereof; a first insulating film above a substrate and covering the first plug; a second contact plug, a diametric dimension of an upper end portion thereof less than lower end portion thereof, the lower end portion contacting the upper end portion of the first plug; a second insulating film above the first insulating film and the first plug and covering the second plug; a wiring layer including a lower end portion contacting the upper end portion of the second plug; and a third insulating film above the second insulating film and the second plug and covering the wiring layer; wherein the upper end portion of the first plug displaced from the lower end portion of the second plug has a step.