Claims
- 1. A magnetic tape comprising:
- a non-magnetic base film;
- a non-magnetic buffer layer formed on said non-magnetic base film; and
- a magnetic recording layer, formed on said non-magnetic buffer layer, containing magnetic hexagonal platelet ferrite particles having a diameter of 0.1 .mu.m or less;
- wherein said non-magnetic buffer layer is provided between said magnetic recording layer and said non-magnetic base film, said magnetic recording layer has a thickness in a range of 0.1-0.6 .mu.m, said non-magnetic buffer layer is composed of at least one of the materials selected from the group consisting of .alpha.-Fe.sub.2 O.sub.3, .alpha.-FeOOH and .gamma.-FeOOH, and the ratio of thickness of said non-magnetic buffer layer to said thickness of said magnetic recording layer is in a range of 3:1 to 4:1.
- 2. A magnetic tape according to claim 1, wherein said magnetic hexagonal platelet ferrite particles have an M or W structure.
- 3. A magnetic tape according to claim 1, wherein the buffer layer comprises .alpha.-Fe.sub.2 O.sub.3 particles and has a thickness in the range from 0.4 to 2.4 .mu.m.
- 4. A magnetic tape according to claim 3, wherein the buffer layer has a thickness in the range from 0.4 to 1.8 .mu.m.
- 5. A magnetic tape according to claim 3, wherein the buffer layer has a thickness in the range from 1.8 to 2.4 .mu.m.
- 6. A magnetic tape according to claim 5, wherein the recording layer has a thickness in the range from 0.3 to 0.6 .mu.m.
- 7. A magnetic tape according to claim 1, wherein the platelet ferrite particles have an average plate size of 0.05 microns.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-007000 |
Jan 1991 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/145,470, filed Oct. 19, 1993 (abandoned), which is a continuation of application Ser. No. 07/822,915, filed Jan. 21, 1992 (abandoned).
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
50-104003 |
Aug 1975 |
JPX |
57-195329 |
Dec 1982 |
JPX |
59-139132 |
Aug 1984 |
JPX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
145470 |
Oct 1993 |
|
Parent |
822915 |
Jan 1992 |
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