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. 06, 1996
Filed:
Dec. 12, 1994
Kaoru Kadoiwa, Itami, JP;
Manabu Kato, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A visible light laser diode includes an etching stopping layer having a lower etching rate in an etching solution than a cladding layer, having a larger band gap energy in bulk than the band gap energy of the active layer, including a layer that stops etching, and having a band gap energy exceeding an energy corresponding to the oscillation wavelength of the visible light laser diode. Therefore, the cladding layer can be selectively etched with satisfactory controllability to a predetermined shape. After the etching process, even with a laminated etching stopping layer partly remaining in the cladding layer, the etching stopping layer does not absorb light emitted from the active layer.