Appeal No. 1999-2839
Application 08/824,716
The instant invention relates to a magnetic tunneling
junction device that displays a magnetic tunneling effect and
has a three layer structure consisting of a magnetic metal
layer/ insulating layer/ magnetic metal layer. Appellants’
specification, page 1, lines 1-8. Specifically, the
invention provides a magnetic tunneling junction device in
which a first magnetic metal layer and a second magnetic metal
layer are connected together by a ferromagnetic tunnel
junction via an insulating layer. Specification, page 2. The
ferromagnetic tunnel junction has a junction area of not
larger than 1x10 m . The invention requires that the-9 2
ferromagnetic tunnel junction area be positively controlled.
Specification, page 3, lines 9-10. The junction area of the
ferromagnetic tunnel junction is formed by a first insulating
layer for the ferromagnetic tunnel junction and a second
insulating layer for limiting the junction area for the
ferromagnetic tunnel junction. Specification, page 3, lines
12-15. Limiting the junction area of the ferromagnetic tunnel
junction to an area not larger than 1x10 m provides a-9 2
structure having excellent insulating properties for
2
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