Appeal No. 1997-3303 Page 2
Application No. 08/171,126
BACKGROUND
Appellants’ invention relates to a method for fabrication of wavelength selective electro-optic
grating for DFB/DBR lasers. An understanding of the invention can be derived from a reading of
exemplary claim 12, which is reproduced as follows:
12. A method for the fabrication of a laser structure including a wavelength selective electro-
optic grating which comprises the steps of
(a) depositing a first n-type contact layer upon the surface of a semi-insulating or doped III-V
semiconductor substrate,
(b) depositing a waveguide upon the n-type contact layer,
(c) depositing a second n-type contact layer upon the waveguide,
(d) depositing an active layer upon the said second n-type contact layer,
(e) selectively etching the active layer down to the waveguide layer in a region of the structure
designed for formation of a grating,
(f) depositing a conductive material on the resultant structure, and
(g) patterning said conductive material to form electrodes in the shape of a grating.
The prior art references of record relied upon by the examiner in rejecting the appealed claims
are:
Tokuda et al. (Tokuda) 4,843,032 June 27, 1989
Okai et al. (Okai) 4,885,753 Dec. 5, 1989
Blonder et al. (Blonder) 5,158,908 Oct. 27, 1992
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007