Semiconductor device manufacturing: process – Making device or circuit emissive of nonelectrical signal – Including integrally formed optical element
Reexamination Certificate
2006-08-01
2006-08-01
Whitehead, Jr., Carl (Department: 2813)
Semiconductor device manufacturing: process
Making device or circuit emissive of nonelectrical signal
Including integrally formed optical element
C438S035000, C257SE33060
Reexamination Certificate
active
07083995
ABSTRACT:
A resist is coated on a substrate. The resist is exposed to a pattern of a plurality of diffraction gratings for setting pitches corresponding respectively to oscillation wavelengths for the plurality of semiconductor lasers and for setting heights of the diffraction gratings which provide an identical coupling coefficient independently of the oscillation wavelengths. The coating is etched in such a manner that the level of etching per unit time is identical. A stripe mask is patterned according to the arrangement of the diffraction gratings. A laser active layer is formed on each of the diffraction gratings by selective MOVPE growth. An electrode is formed on each of the laser active layer on its top surface and the backside of the substrate. By virtue of this constitution, an optical semiconductor device and a process for producing the same can be realized which, when a plurality of semiconductor lasers are simultaneously formed on a single semiconductor substrate, can prevent a variation in coupling coefficient.
REFERENCES:
patent: 3970958 (1976-07-01), Streifer et al.
patent: 4993036 (1991-02-01), Ikeda et al.
patent: 5295150 (1994-03-01), Vangieson et al.
patent: 5901166 (1999-05-01), Nitta et al.
patent: 5930278 (1999-07-01), Menigaux
patent: 5953359 (1999-09-01), Yamaguchi et al.
patent: 5982804 (1999-11-01), Chen et al.
patent: 2001/0005391 (2001-06-01), Sakata
patent: 02090688 (1990-03-01), None
patent: 03-110884 (1991-05-01), None
patent: 03-110885 (1991-05-01), None
Dolan Jennifer M
Jr. Carl Whitehead
NEC Electronics Corporation
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