Appeal No. 1998-2938
Application 08/510,752
Claims 3, 4, 6, and 7 stand rejected under 35 U.S.C.
§ 103(a) as being unpatentable over Ishikawa and Zucker as
applied to claims 1 and 5, further in view of Chen.
We refer to the Final Rejection (Paper No. 14) (pages
referred to as "FR__") and the Examiner's Answer (Paper
No. 20) (pages referred to as "EA__") for a statement of the
Examiner's position, and to the Brief (Paper No. 19) (pages
referred to as "Br__") for a statement of Appellants'
arguments thereagainst.
OPINION
Content of Ishikawa and Zucker
Ishikawa discloses a quantum well structure constructed
by gradually varying a mixture of AlGaAs (col. 3, lines 31-57)
or by stacking layers of AlGaAs/AlAs of varying mixture ratios
(col. 3, line 62 to col. 4, line 41) to produce a quantum
confined potential that is symmetrical with respect to the
center position of the quantum well plane and varies in
proportion to the square of the distance from the center
position, that is, in a curve of second degree as shown in
figure 1. Ishikawa discloses that the respective shifts of
the 1e-1lh and 1e-1hh transitions are substantially equal
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