Ferromagnetic films for high density recording and methods of pr

Details Ferromagnetic films for high density recording and methods of pr Ferromagnetic films for high density recording and methods of pr

1983-12-15

1985-05-28

Newsome, John H.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

204192N, 2504923, B05D 306

Patent

active

045200408

ABSTRACT:
A ferromagnetic film for magnetic recording comprises a copper substrate having particles of iron and iron oxides dispersed in the surface layer of the copper. The particles have maximum dimensions in the range between 50 and 500 Angstroms. The ferromagnetic film can be formed by ion implantation of iron ions into the copper substrate followed by heat treatment to permit growth of ferromagnetic particles to the desired size. As an alternative to ion implantation, the iron can be deposited on the copper substrate by sputtering or evaporation and mixed with the copper by ion beam mixing.

REFERENCES:
patent: 4372985 (1983-02-01), Bailey
patent: 4390601 (1983-06-01), Ono et al.
patent: 4395465 (1983-07-01), Takagi et al.
patent: 4404233 (1983-09-01), Ikeda et al.
K. T. Short et al., "High Resolution RBS and Channeling Analysis of Ion Implanted Single Crystal Fe", Nucl. Instrum. Methods, 191 (1981), pp. 537-542.
D. M. Follstaedt, "Microstructure Evolution in Titanium-Implanted Iron," Thin Solid Films, 63 (1979), p. 39.
Handbook of Physics, Ed. E. Condon et al., 2nd Ed., McGraw-Hill, Part 4, Chap. 8, Sec. 9, pp. 4-139 to 4-141.

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