Method of fabrication for tape medium read head with unitary formation of multiple elements
View Patent ↗A method is presented for fabrication of a tape medium read head having a unitary formation of multiple elements for reading multi-track data from a magnetic tape. The method includes providing a continuous substrate layer, and forming a sensor material layer on the continuous substrate layer. Photoresist material is deposited on the sensor material layer, and is patterned to form masks which provide protected areas and exposed areas of the sensor material layer. Exposed areas of the sensor material layer are shaped to form sensors from the protected areas of the sensor material layer. Electrical lead materials are deposited between and adjacent to the sensors, and the masks are removed.
1. A method for fabricating a read head having multiple integral elements for reading multiple tracks of recorded data on magnetic tape, comprising:
A) providing a continuous substrate layer;
B) forming multiple sensors on said substrate layer comprising:
i) depositing photoresist material on said sensor material layer;
ii) patterning said photoresist material to form masks which provide protected areas and exposed areas of said sensor material layer; and
iii) shaping said exposed areas of said sensor material layer to form sensors from the said protected areas of said sensor material layer;
C) fabricating electrical leads between said sensors, said sensors and electrical leads together forming elements in a matrix, and each electrical lead which is not the first lead in said matrix, or the last lead in said matrix, is simultaneously a member of a first element and a second element, such that a unitary read head is formed having said multiple sensors formed on said continuous substrate such that said multiple sensors are configured to read multiple tracks of recorded data on magnetic tape; and
D) providing a means for connecting a current source having a positive terminal and a negative terminal.
2. The method of claim 1 , wherein said forming of said sensors in B) is done by ion milling.
3. The method of claim 1 , wherein said continuous substrate layer of A) is a first gap layer.
4. The method of claim 3 , wherein said first gap layer is formed on a first shield layer.
5. The method of claim 1 , wherein said electrical leads are formed from materials that also serve to magnetically bias said sensor material.