Appeal No. 2003-1208
Application 09/590,805
Rejection of claim 3 over Kalnitsky in view of
the appellants’ admitted prior art and Tursky
The appellants’ claim 3, which depends from claim 1,
requires that “said first device comprises a field oxide that has
been implanted with a material that traps positive charge when
said first device is exposed to ionizing radiation and said
second device has not been implanted with said material.”
Tursky discloses “a freewheeling diode device for a
switchable device component including a commutator branch”
(col. 1, lines 6-8). Tursky teaches that “[a] freewheeling diode
is essentially a rectifier diode connected across an inductive
load to carry a current resulting from the energy stored in the
inductance when no power is being supplied by the source to the
load and until all the energy in the inductance has been
dissipated or until the next voltage” (col. 1, lines 38-43). The
freewheeling diode device includes, in parallel, a first
diode (12) having soft recovery behavior and a second diode (14)
having snappy switching behavior (col. 3, lines 39-48; col. 4,
lines 56-60; col. 6, lines 7-9). Each diode has n+, n–
and p zones between metallization zones (col. 8, lines 7-33;
figures 9 and 10).
14
Page: Previous 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Next
Last modified: November 3, 2007