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:
Dec. 12, 2006
Filed:
May. 31, 2005
Applicants:
Kenji Nomura, Kawasaki, JP;
Wensheng Wang, Kawasaki, JP;
Inventors:
Kenji Nomura, Kawasaki, JP;
Wensheng Wang, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/94 (2006.01);
U.S. Cl.
CPC ...
Abstract
Additional elements of Ca, Sr, and Ir are added to a single layer lead lanthanum zirconate titanate (PLZT), thereby decreasing a c/a ratio to within a range from 1.00 to 1.008 smaller than a general c/a of a range from about 1.01 to 1.03 generally used in a lead lanthanum zirconate titanate (PLZT) crystal having a crystal structure of a tetragonal system. With this arrangement, a large switching charge Qsw can be obtained without thinning the PLZT layer even when the operation voltage is 3.0 V or less.