Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With particular semiconductor material
Patent
1998-03-13
2000-08-22
Tran, Minh Loan
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
With particular semiconductor material
257 96, 257 97, 257190, 257191, H01L 3300
Patent
active
061076481
ABSTRACT:
A light emitting layer forming portion is formed of an AlGaInP-based compound semiconductor and having an n-type layer and a p-type layer to form a light emitting layer on the substrate. A large bandgap energy semiconductor layer is provided on a surface of the light emitting layer forming portion to constitute a window layer. A buffer layer is interposed between the light emitting layer forming portion and the large bandgap energy semiconductor layer to relieve lattice mismatch of between the light emitting layer forming portion and the large bandgap energy semiconductor layer. The interposition of this buffer layer provides a light emitting device that is high in light emitting efficiency and excellent in electrical characteristics without degrading the film property of the window layer.
REFERENCES:
patent: 5008718 (1991-04-01), Fletcher et al.
patent: 5661742 (1997-08-01), Huang et al.
patent: 5869849 (1999-02-01), Jou et al.
Matsumoto Yukio
Nakata Shunji
Shakuda Yukio
Rohm & Co., Ltd.
Tran Minh Loan
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