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:
Jul. 14, 2009
Filed:
Oct. 31, 2005
Manabu Taniguchi, Miyagi, JP;
Motonobu Takeya, Miyagi, JP;
Tsuyoshi Fujimoto, Miyagi, JP;
Masao Ikeda, Miyagi, JP;
Toshihiro Hashidu, Miyagi, JP;
Manabu Taniguchi, Miyagi, JP;
Motonobu Takeya, Miyagi, JP;
Tsuyoshi Fujimoto, Miyagi, JP;
Masao Ikeda, Miyagi, JP;
Toshihiro Hashidu, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
An upper portion of a second clad layer and a contact layer are provided with grooves so as to form a ridge therebetween. An electrode is formed on the ridge. An insulation film is formed to extent on side surfaces of the ridge, on the inside of the grooves, and those portions of the contact layer which are located on the outside of the grooves. The thickness of those portions of the insulation film which are located on the contact layer in the areas on the outside of the grooves is set to be greater than at least the thickness of the electrode. Besides, a pad electrode is formed to cover the electrode and to extend on the insulation film on the upper side of the areas on the outside of the grooves. The upper surfaces of those portions of the pad electrode which are located on the upper side of the areas on the outside of the grooves are set to be above the upper surface of that portion of the pad electrode which is located on the upper side of the ridge.