Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Soo-haeng Cho0
Date of Patent
August 28, 2007
0Patent Application Number
109894340
Date Filed
November 17, 2004
0Patent Primary Examiner
Patent abstract
A semiconductor laser diode is provided, including: an active layer; an upper clad layer formed above the active layer; a first lower clad layer formed below the active layer; a second lower clad layer formed under the first lower clad layer; and a substrate formed under the second lower clad layer, wherein a refractive index of the first lower clad layer is identical with a refractive index of the upper clad layer and is lower than a refractive index of the second lower clad layer.
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