Claims
- 1. A composite material for use in the preparation of a substrate for thin film magnetic heads consisting essentially of about 50 to 95% by volume carbonaceous or graphitic carbon or mixtures of these together with about 5 to 50% of a binder.
- 2. A substrate for use in the preparation of thin film magnetic heads comprising a composite material of claim 1.
- 3. A substrate of claim 2 wherein the carbonaceous or graphitic material is selected from a group consisting of natural graphite, synthetic graphite, coal coke, oil coke, carbon black, and coal powder.
- 4. A substrate of claim 3 wherein the binder is a thermosetting or thermoplastic resin.
- 5. A substrate of claim 3 wherein the binder is a metal.
- 6. A substrate of claim 5 wherein the metal is iron, manganese, chronium, cobalt, titanium, molybdenum, tungsten or an alloy thereof.
- 7. A substrate of claim 4 impregnated with a resin.
- 8. A substrate of claim 7 wherein the resin is a phenol formaldehyde resin, a divinylbenzene resin, a furan-formaldehyde resin, a fluorinated hydrocarbon resin, a polyethylene resin, a polypropylene resin or a polymide resin.
- 9. A substrate of claim 4 impregnated with a metal.
- 10. A substrate of claim 9 wherein the metal is tin, antimmy, copper, zinc, silver, lead, aluminum, magnesium or an alloy thereof.
- 11. A substrate of claim 5 impregnated with a resin.
- 12. A substate of claim 11 wherein the resin is a phenolformaldehyde resin, a divinylbenzene resin, a furan-formaldehyde resin, a flourinated hydrocarbon resin, a polyethylene resin, a polypropylene resin or a polyamide resin.
- 13. A substrate of claim 5 impregnated with a metal.
- 14. A substrate of claim 13 wherein the metal is tin, antimony, copper, zinc, silver, lead, aluminum, magnesium or an alloy thereof.
- 15. A substrate of claim 4 impregnated with a non-metallic inorganic compound.
- 16. A substate of claim 15 wherein the non-metallic compound is a glass.
- 17. A substrate of claim 16 wherein the glass is a borosilicate, silicic acid, silicate-alkali, lead alkali, soda lime or potassium, calcium or barium containing glass.
- 18. A substrate of claim 5 impregnated with a non-metallic inorganic compound.
- 19. A sustrate of claim 18 wherein the non-metallic compound is a glass.
- 20. A substrate of claim 19 wherein the glass is a borosilicate, silicic acid, silicate-alkali, lead alkali, soda lime or potassium, calcium or barium containing glass.
- 21. A substrate of claim 2 wherein the binder is a metal, and the impregnant is a metal with a melting point lower than the melting point of the metallic binder.
- 22. A thin film magnetic head for sliding contact with a magnetic surface comprising a substrate made of a composite material according to claim 1.
RELATED APPLICATIONS
This application is a continuation-in-part application of our earlier filed, copending application Ser. No. 513,230 filed July 13, 1983, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3705450 |
Morisaki |
Dec 1972 |
|
4092688 |
Nomura et al. |
May 1978 |
|
4127884 |
Nouchi et al. |
Nov 1978 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
57-14078 |
Mar 1982 |
JPX |
57-138037 |
Aug 1982 |
JPX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
513230 |
Jul 1983 |
|