Tape array electrical lapping guide design for small stripe TMR sensor
A magnetic tape recording module having electrical lapping guides located within and adjacent to an array of magnetic read/write elements. Electrical leads connected with the electrical lapping guides are buried deep within the head build, close to the substrate so that they can pass beneath the electrical leads of the read/write elements without any capacitive coupling between the electrical lapping guide leads and the read/write element leads. The presence of the electrical lapping guides within and adjacent to the read/write element leads provides much more accurate control of read/write element stripe height during lapping.
1. A slider for data recording, comprising:
a slider body including an electrically insulating layer formed on a substrate;
a plurality of magnetic read/write elements formed on a top surface of the electrically insulating layer;
a plurality of electrically conductive read/write element leads electrically connected with the plurality of read/write elements;
an electrical lapping guide formed on the top surface of the electrically insulating layer; and
a plurality of electrically conductive electrical lapping guide leads electrically connected with the electrical lapping guide, a portion of the plurality of electrically conductive electrical lapping guide leads buried within the electrically insulating layer.
2. The slider as in claim 1 wherein the portion of the plurality of electrically conductive electrical lapping guide leads are located closer to the slider substrate than the electrically conductive read/write elements.
3. The slider as in claim 1 wherein the plurality of read/write elements form an array of read/write elements and wherein at least a portion of the electrical lapping guide is located close to the array of read/write elements and wherein the plurality of electrically conductive electrical lapping guide leads are configured to connect the electrical lapping guide located close to the array of read/write elements to a contact location located away from the array of read/write elements.
4. The slider as in claim 3 , wherein the electrical lapping guide is located within the array of read/write elements.
5. The slider as in claim 3 further comprising two additional electrical lapping guides, wherein the two additional electrical lapping guides are located at opposite ends of the read/write element array and the electrical lapping guide is located within the array of read/write elements leads.
6. The slider as in claim 2 , wherein at least a portion of the electrically conductive electrical lapping guide leads are located no more than 1000 nanometers from the substrate.
7. The slider as in claim 2 , wherein at least a portion of the electrically conductive electrical lapping guide leads are located no more than 1000 nanometers from the substrate and at least 2000 nanometers beneath the read/write element leads.
8. The slider as in claim 1 , further comprising an electrically conductive via for electrically connecting the electrical lapping guide with the electrical lapping guide lead.
9. The slider as in claim 8 , wherein the via is constructed of an electrically conductive, magnetic material.
10. A magnetic tape recording system, comprising:
a housing;
a slider held within the housing; and
a mechanism for receiving a magnetic tape and engaging the magnetic tape against the slider;
the slider further comprising:
a slider body including an electrically insulating layer formed on a substrate;
a plurality of magnetic read/write elements formed on a top surface of the electrically insulating layer;
a plurality of electrically conductive read/write element leads electrically connected with the plurality of read/write elements;
an electrical lapping guide formed on the top surface of the electrically insulating layer; and
a plurality of electrically conductive electrical lapping guide leads electrically connected with the electrical lapping guide, a portion of the plurality of electrically conductive electrical lapping guide leads buried within the electrically insulating layer.
11. The magnetic tape recording system as in claim 10 , wherein the portion of the plurality of electrically conductive electrical lapping guide leads are located closer to the substrate than the electrically conductive read/write elements.
12. The magnetic tape recording system as in claim 10 , wherein the plurality of read/write elements form an array of read/write elements and wherein at least a portion of the electrical lapping guide is located close to the array of read/write elements and wherein the plurality of electrically conductive electrical lapping guide leads are configured to connect the electrical lapping guide located close to the array of read/write elements to a contact location located away from the array of read/write elements.
13. The magnetic tape recording system as in claim 12 , wherein the electrical lapping guide is located within the array of read/write elements.
14. The magnetic tape recording system as in claim 12 , further comprising two additional electrical lapping guides, wherein the two additional electrical lapping guides are located at opposite ends of the read/write element array and the electrical lapping guide is located within the array of read/write elements leads.
15. The magnetic tape recording system as in claim 11 , wherein at least a portion of the electrically conductive electrical lapping guide leads are located no more than 1000 nanometers from the substrate.
16. The magnetic tape recording system as in claim 11 , wherein at least a portion of the electrically conductive electrical lapping guide leads are located no more than 1000 nanometers from the substrate and at least 2000 nanometers beneath the read/write element leads.
17. The magnetic tape recording system as in claim 10 , further comprising an electrically conductive via for electrically connecting the electrical lapping guide with the electrical lapping guide lead.
18. The magnetic tape recording system as in claim 17 , wherein the via is formed of an electrically conductive, magnetic material.