Multichannel 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. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic recording head comprising:
two or more independently controllable 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the independently controllable and magnetically isolated channels using intervals of electrical current comprising different timing from one channel to another, such different timing among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.
2. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the magnetically isolated channels using intervals of electrical current comprising different timing from one channel to another, such different timing among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.
3. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic recording head comprising:
two or more independently controllable 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the independently controllable and magnetically isolated channels using electrical current pulses comprising different functions of time from one channel to another, such different functions of time among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.
4. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic recording head comprising:
two or more independently controllable 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the independently controllable and magnetically isolated channels using electrical current pulses comprising different time signatures from one channel to another, such different time signatures among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.
5. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the magnetically isolated channels using electrical current pulses comprising different functions of time from one channel to another, such different functions of time among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.
6. Magnetic tape media comprising:
a plurality of timing-based servo tracks formatted using a timing-based surface thin film magnetic 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, independently controlled coil for each of the channels;
wherein the plurality of servo tracks are recorded via the magnetically isolated channels using electrical current pulses comprising different time signatures from one channel to another, such different time signatures among the plurality of magnetically isolated channels providing the magnetic tape media with timing-based magnetic transitions that are uniquely written in each of the plurality of servo tracks.