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:
Jul. 12, 2016
Filed:
Jun. 11, 2013
Renesas Sp Drivers Inc., Kodaira-shi, Tokyo, JP;
Kazuhiko Sato, Tokyo, JP;
Yasuhiro Fujii, Tokyo, JP;
Synaptics Display Devices GK, Tokyo, JP;
Abstract
The SRAM memory cell includes a metal wiring line having a titanium or tantalum film in a bottom layer, and a via having a tungsten plug. The via is arranged on the metal line following a layout rule which permits the misalignment. In arranging the upper-layer via with a tungsten plug on the metal line, one side of the via is disposed to be adjacent to one end of the metal line with a margin smaller than an alignment accuracy, and the lower-layer via is laid out far away from the end of the metal line as possible. The reduction in the yield, caused by the problem of the contact with the lower-layer via being broken or increased in resistance at occurrence of misalignment, can be suppressed.