Appeal No. 2001-0716
Application No. 08/813,132
The disclosed invention relates to a planar magnetic winding
structure having a core of two or more core components with
mutually facing planar surfaces separated by an air gap having a
height g. Further included in the winding structure are a stack
of winding layers, each layer including one or more turns, in
which the edges of the windings are separated from the air gap by
a distance of at least 2g. According to Appellants
(Specification, pages 4 and 5), a winding structure having an air
gap “keep away” region of at least two times the gap height in
which there are no windings reduces high frequency winding losses
without appreciable increases in low frequency winding losses.
Claim 1 is illustrative of the invention and reads as
follows:
1. A planar magnetic winding structure comprising a core
and a stack of winding layers including one or more turns, the
core comprised of two or more core components having mutually
facing planar surfaces separated by at least one air gap g, and
all surfaces of the winding layers are separated from the air gap
by a distance of at least 2g.
The Examiner relies on the following prior art:
House et al. (House) 4,480,377 Nov. 06, 1984
Estrov 5,010,314 Apr. 23, 1991
-2–2
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