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:
Feb. 11, 2014
Filed:
Nov. 08, 2010
Takahiro Koyama, Tokyo, JP;
Sadayuki Okuma, Tokyo, JP;
Takahiro Koyama, Tokyo, JP;
Sadayuki Okuma, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A semiconductor device includes a plurality of first data input/output terminals, a plurality of second data input/output terminals, a first semiconductor chip, and a second semiconductor chip. The first semiconductor chip includes a plurality of first data input/output pads connected with the first data input/output terminals, a first test circuit, and a first memory portion. The first test circuit generates a first test result in response to a data output from the first memory portion at a test operation. The second semiconductor chip includes a plurality of second data input/output pads connected with the second data input/output terminals, a second and a third test circuits, and a second memory portion. The second test circuit generates a second test result in response to a data output from the second memory portion, and the third test circuit generates a third test result in response to the second test result and the first test result input from the first test circuit of the first semiconductor chip and outputs the third test result from a specified second data input/output terminal.