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. 23, 2010
Filed:
Dec. 08, 2006
Shoichiro Yamaguchi, Ichinomiya, JP;
Yuichi Iwata, Nagoya, JP;
Kengo Suzuki, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
NGK Optoceramics Co., Ltd., Komaki, JP;
Abstract
It is provided a novel method of producing polarization inversion parts by electric field polling process wherein the polarization inversion part extends to a deeper point from the surface of a substrate. The polarization inversion part is produced by electric field polling process using a comb electrode having a plurality of electrode portionsand a feeding portion. Each electrode portionhas a base portionextending from the feeding portionand a plurality of conductive portionsandseparated from the base portions, and the conductive portions have an average length 'd' of 4 μm or longer and 9 μm or shorter. Alternatively, each electrode portionhas a base portionextending from the feeding portionand a plurality of conductive portionsandseparated from the base portion, and the conductive portionat the tip end of the electrode portion has a length 'db' smaller than the length “da” of the conductive portionnearest to the base portion.