Patent ID: 7832084

Claim:
A method of recording servo information, comprising the step of writing servo information in a data storage medium using a compound servo writer head made by a method comprising the steps of: (a) providing a substrate comprising first and second magnetically permeable substrate portions, the first substrate portion comprising first and second sub-pole members, a first sub-gap member interposed between the first and second sub-pole members, and a first coil energizingly coupled to the first substrate portion, and the second substrate portion comprising third and fourth sub-pole members, a second sub-gap member interposed between the third and fourth sub-pole members, and a second coil energizingly coupled to the second substrate portion; (b) forming a magnetically permeable layer over the first and second magnetically permeable substrate portions of the substrate; and (c) using a single mask to lithographically pattern a first writing gap feature in a portion of the magnetically permeable layer overlying the first sub-gap member and a second writing gap feature in a portion of the magnetically permeable layer overlying the second sub-gap member.