Method of making a multi-channel time based servo tape media
A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations.
1. A method of formatting magnetic tape media comprising:
providing a timing-based surface thin film recording head comprising:
two or more independent and magnetically isolated channels, each channel including a pair of highly magnetically permeable sub-poles separated by a substantially magnetically impermeable barrier forming a sub-gap therebetween;
a surface film over each channel, the surface film of each channel spanning from one sub-pole to another over the sub-gap and comprising at least one timing-based magnetic gap; and
a separate coil for each of the channels;
passing the media over the head; and
independently energizing two or more of the separate coils of the independent and magnetically isolated channels with a format signal to cause a timing-based pattern to be written onto each corresponding channel of the tape media.
2. The method of claim 1 , wherein the surface film over each channel comprises a plurality of magnetic gaps.
3. The method of claim 1 , wherein the surface film has been patterned so as to magnetically isolate each of the channels.
4. The method of claim 3 , wherein a space between each channel is devoid of the surface film.
5. The method of claim 1 , wherein the format signal for at least two of the coils is different.
6. The method of claim 5 , wherein the surface film over each channel comprises a plurality of magnetic gaps.
7. The method of claim 6 , wherein the surface film has been patterned so as to magnetically isolate each of the channels.
8. The method of claim 7 , wherein a space between each channel is devoid of the surface film.
9. The method of claim 1 , wherein the format signal for at least two of the coils is the same.
10. A method of formatting magnetic recording medium comprising:
providing a timing-based surface thin film recording head comprising:
two or more channels, each channel including a pair of highly magnetically permeable sub-poles separated by a substantially magnetically impermeable barrier forming a sub-gap therebetween;
a surface film spanning from one sub-pole to another over the sub-gap of each channel and comprising at least one magnetic gap for each channel, wherein the surface film has been patterned to magnetically isolate each of the channels; and
a separate coil for each of the channels;
passing the medium over the head; and
independently energizing two or more of the separate coils of the magnetically isolated channels with a format signal to cause a timing-based pattern to be written onto each corresponding channel of the recording medium.
11. The method of claim 10 , wherein the format signal for at least two of the coils is different.
12. The method of claim 10 , wherein the format signal for at least two of the coils is the same.
13. A method of formatting magnetic tape media comprising:
providing a timing-based surface thin film recording head comprising:
two or more independent and magnetically isolated channels, each channel including a pair of highly magnetically permeable sub-poles separated by a substantially magnetically impermeable barrier forming a sub-gap therebetween;
a surface film over each channel, the surface film of each channel spanning from one sub-pole to another over the sub-gap and comprising at least one timing-based magnetic gap; and
a common coil spanning each of the channels;
passing the media over the head; and
energizing the coil with a format signal to cause a timing-based pattern to be written onto the tape media.
14. The method of claim 13 , wherein the surface film over each channel comprises a plurality of timing-based magnetic gaps.
15. The method of claim 13 , wherein the surface film has been patterned so as to magnetically isolate each of the channels.
16. The method of claim 15 , wherein a space between each channel is devoid of the surface film.