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:
May. 14, 2013
Filed:
Jul. 31, 2012
Hideyuki Yoko, Tokyo, JP;
Kayoko Shibata, Tokyo, JP;
Hideyuki Yoko, Tokyo, JP;
Kayoko Shibata, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A semiconductor device includes a first semiconductor chip that includes a driver circuit, a second semiconductor chip that includes a receiver circuit and an external terminal, and a plurality of through silicon vias that connect the first semiconductor chip and the second semiconductor chip. The first semiconductor chip further includes an output switching circuit that selectively connects the driver circuit to any one of the through silicon vias, the second semiconductor chip further includes an input switching circuit that selectively connects the receiver circuit to any one of the through silicon vias and the external terminal, the input switching circuit includes tri-state inverters each inserted between the receiver circuit and an associated one of the through silicon vias and the external terminal, and the input switching circuit activates any one of the tri-state inverters.