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Class 257/E33.032 - With heterojunction (e.g., AlGaAs/GaAs) (EPO)


Subclass of Class 257 - Active solid-state devices (e.g., transistors, solid-state diodes)
Definition: This subclass is indented under subclass E33.031. This subclass
No. of patents: 6
Last issue date: 05/20/2008


NumberTitleIssue Date
7374959Two-wavelength semiconductor laser device and method of manufacturing the same
A two-wavelength semiconductor laser device includes a first conductive material substrate having thereon first and second regions separated from each other. A first semiconductor laser diode is formed on the first region. A non-active layer is formed on the second ...
05/20/2008
7348602Nitride semiconductor device
The present invention provides a nitride semiconductor light emitting device with an active layer of the multiple quantum well structure, in which the device has an improved luminous intensity and a good electrostatic withstanding voltage, thereby allowing the expan...
03/25/2008
7276735Laminated semiconductor substrate and optical semiconductor element
A low-cost high-property optical semiconductor element for a long wavelength is provided, using a GaAs substrate. The optical semiconductor element comprises a substrate of GaAs having a first surface and a second surface opposite to each other, a buffer layer of In...
10/02/2007
7253865Non rectangular display device
A display device has an array 40 of pixels and row and column driver circuitry comprising row driver circuit portions R and column driver circuit portions C, each pixel being addressed by a row driver circuit portion R and a column driver circuit portion C wh...
08/07/2007
7217960Semiconductor device
It is an object of the present invention to provide a semiconductor device, which can simultaneously achieve a normally-off mode of HFET and an improvement in Imax, and further achieve an improvement in gm and a reduction in gate leakage curren...
05/15/2007
7145180Method of fabricating a light emitting device, and light emitting device
In the fabricating of a light emitting device, a light emitting layer portion 24 and a current spreading layer 7, respectively composed of a Group III-V compound semiconductor, are stacked on a single crystal substrate. The light emitting layer portion...
12/05/2006
 
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