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:
Jan. 22, 2013
Filed:
Nov. 20, 2008
Takanori Shimizu, Tokyo, JP;
Masafumi Nakada, Tokyo, JP;
Takanori Shimizu, Tokyo, JP;
Masafumi Nakada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
There is provided a waveguide type optical device whose parasitic capacitance is reduced to allow an increase in signal transmission speed. Bottom electrodeis formed on substrate, bottom claddingis formed on bottom electrode, and bottom coreis formed on bottom cladding. Top coreis formed on bottom core, top claddingis formed on top core, and top electrodeis formed on top cladding. Two sides of top coreand bottom coreare covered with side cladding layer. Vertically overlapping portions of top electrodeand bottom electrodeare located almost at a same place as a region for a core layer composed of top coreand bottom core. The width of one from among top coreand bottom coreis satisfying a single mode condition, and the width of the other is almost equal to or more than the width of a field distribution.