Write head for a magnetic tape medium with magnetically encoded servo band bursts

摘要

A write head for writing a servo pattern to a magnetic tape medium includes a first coil configured to generate a first magnetic flux when applying an electric current to the first coil, a second coil configured to generate a second magnetic flux when applying an electric current to the second coil, and a pole piece structure configured to guide the generated magnetic flux. The pole piece includes a first ring structure for guiding the first magnetic flux, a second ring structure for guiding the second magnetic flux, and a common section of the first and the second ring structure which common section is arranged between the first coil and the second coil. The write head further includes a section containing a gap in each of the first ring structure and the second ring structure. The magnetic flux is oriented in opposite directions across the two gaps.

主权项

1. A magnetic tape medium and write head for writing at least one servo pattern on the magnetic tape medium comprising:
a first coil configured to generate a first magnetic flux when applying an electric current to the first coil; a second coil configured to generate a second magnetic flux when applying an electric current to the second coil; a pole piece structure configured to guide the generated magnetic flux, comprising a first ring structure for guiding the first magnetic flux, a second ring structure for guiding the second magnetic flux, and a common section of the first and the second ring structure, which common section is arranged between the first coil and the second coil; and a section containing a gap in each of the first ring structure and the second ring structure, wherein the magnetic flux is oriented in opposite directions across the two gaps, and wherein the sections containing the gaps are oriented in a common plane; wherein the magnetic tape medium comprises:
at least one servo band along a longitudinal extension of the tape medium, the at least one servo band comprising servo patterns organized in servo frames for supporting to determine positional information;at least one of the servo frames comprising a first burst comprising at least two servo stripes inclined at a first angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, followed by a second burst comprising at least two servo stripes inclined at a second angle with respect to the direction orthogonal to the longitudinal extension of the tape medium, which second angle is different from the first angle; andwherein at least one of the stripes of the first burst has a first magnetic polarity, and wherein at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity; and for at least one of the first and second bursts, different stripes within a same burst have opposite magnetic polarities with respect to one another.