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:
Jun. 19, 2012
Filed:
Mar. 12, 2007
Applicant:
Masanori Shibamoto, Tokyo, JP;
Inventor:
Masanori Shibamoto, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/11 (2006.01);
U.S. Cl.
CPC ...
Abstract
A joint board is arranged between an upper package and a lower package. The arrangement of the joint board makes it possible to reduce the size of solder balls and to arrange them with narrower pitch. The joint board has slightly greater dimensions those of the upper package and the lower package. This makes it possible to prevent underfill from leaking and spreading.