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:
Aug. 02, 1994
Filed:
Aug. 30, 1991
Toshiyuki Okumura, Tenri, JP;
Kazuhiko Inoguchi, Nara, JP;
Fumihiro Konushi, Nara, JP;
Haruhisa Takiguchi, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A buried stripe type semiconductor laser device having a mesa stripe whose side faces are {111} facets and having a current confinement structure under epitaxial layers burying the mesa stripe is disclosed. The buried stripe type semiconductor laser device comprises a (100) semiconductor substrate having a stripe-shaped ridge in the <011> direction, a multi-layer film of a double hetero structure formed on the upper surface of the stripe-shaped ridge. The mutil-layer film includes a laser oscillating active layer of a smaller width than that of the stripe-shaped ridge. The current confinement means are formed at both sides of the mesa stripe on the semiconductor substrate. In addition, a method of fabricating a buried stripe type semiconductor laser device having no raised portion above a mesa stripe of a substrate is disclosed. The laser device can be mounted in position with the epitaxial layer side down, without the mesa stripe being damaged or strained.