| Autor: |
D. McCown, R. Lee, H. Santini, C. Tsang, J. Lo |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Magnetics. 32:7-12 |
| ISSN: |
0018-9464 |
| DOI: |
10.1109/20.477542 |
| Popis: |
We have successfully demonstrated magnetic recording at an areal density of 3 Gb/in/sup 2/ with narrow track inductive-write MR-read dual element heads on low noise Co alloy thin film disks. In this demonstration, the write head is a ten turn thin film inductive head with thick and narrow P2 pole-tips. The read head is a shielded /spl sim/1 /spl mu/m trackwidth MR sensor soft-film biased in the read region for linearization and exchange-biased at the tail regions for magnetic stabilization. During recording tests, the heads were flown over low noise Co-alloy media at a clearance similar to that in the previous 1 Gb/in/sup 2/ recording experiment. Results showed good writability from the narrow track write head in terms of overwrite and hard transition shift. Readback yields symmetrical signals as large as 600 /spl mu/V (p-p) and rolloff measurements showed 50% densities as high as 5000 fc/mm. Track profile and microtrack profile measurements showed the write and read trackwidths to be /spl sim/1.4 /spl mu/m and /spl sim/1.1 /spl mu/m respectively, with tight side-writing and side-reading characteristics. An overall assessment of the parametric recording results suggested areal density feasibility up to as high as 3 Gb/in/sup 2/. This projection was confirmed by error rate performance testing using a PRML channel with a digital filter and write precompensation. At a data rate of 4-5 Mb/s and at very low ontrack error, a linear density as high as 185 Kbpi and an optimized track pitch as narrow as 1.5 /spl mu/m were achieved, corresponding to an areal recording density of /spl sim/3.1 Gb/in/sup 2/. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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