Appeal No. 1998-1632 Page 9
Application No. 08/536,045
forming said thin film of Ni-Fe by sputtering Ni and
Fe on said base material from an Ni target and a Fe
target disposed separately while said Ni target and said
Fe target and said base material are relatively rotated;
and
forming a plurality of thin layers of Ni and Fe
alternately.
8. The method according to claim 7, wherein an
amount of Ni in the composition of the whole magneto-
resistance effect thin film is selected to be between 75
to 90 atomic percent.
9. The method according to claim 7, wherein the
thin layers of Ni and Fe are selected to be less than 10Å
thick.
10. The method according to claim 7, wherein a
magneto-resistance changing ratio ??/?0 has a value
exceeding 3% and a coercive force Hch of less than 1.0.
11. A method of manufacturing a magneto-resistance
effect magnetic head comprising the steps of:
providing a base material for forming thereon a thin
film for a magneto-resistance type magnetic head;
forming said thin film of Ni-Fe by sputtering Ni and
Fe on said base material from an Ni target and a Fe
target disposed separately while said Ni target and said
Fe
target and said base material are relatively rotated; and
12. The method according to claim 11, wherein an
amount of Ni in the composition of the whole magneto-
resistance effect thin film is selected to be between 75
to 90 atomic percent.
13. The method according to claim 11, wherein the
thin layers of Ni and Fe are selected to be less than 10Å
thick.
14. The method according to claim 11, wherein a
magneto-resistance changing ratio ??/?0 has a value
exceeding 3% and a coercive force Hch of less than 1.0.
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