Method of making pole tip structure for thin film magnetic heads

Details Method of making pole tip structure for thin film magnetic heads Method of making pole tip structure for thin film magnetic heads

1993-12-30

1995-02-28

Powell, William

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156657, 1566591, 156656, B44C 122, C03C 1500, C03C 2500

Patent

active

053933761

ABSTRACT:
A simplified method is provided for making a thin film magnetic head pole tip structure which includes a sidegap G sandwiched between pole tips PT1 and PT2. The method includes depositing bottom and top seedlayers with an insulation layer sandwiched therebetween. The pole tip PT2 is frame plated on top of the top seedlayer with top and bottom film surfaces which are bounded in part by a pair of spaced-apart sidewalls. The second seedlayer and preferably a depth portion of the insulation layer are removed with the exception of width portions of these layers below the pole tip PT1. A gap insulation layer is deposited on a sidewall of the pole tip PT1 to form the sidegap. The insulation layer with the exception of a portion of an insulation layer below the pole tip PT1 is removed to expose a portion of the bottom seedlayer adjacent to the pole tip PT1 where the pole tip PT2 is to be formed. The pole tip PT2 is then frame plated on top of the exposed portion of the first seedlayer adjacent to the sidegap to complete the desired thin film magnetic head.

REFERENCES:
patent: 4670972 (1987-06-01), Sakakima
patent: 4837924 (1989-06-01), Lazzari
patent: 4912584 (1990-03-01), Mallary et al.
patent: 4949207 (1990-08-01), Lazzari
patent: 5059278 (1991-10-01), Cohen et al.
patent: 5062196 (1991-11-01), Deroux-Dauphin
patent: 5075956 (1991-12-01), Das
patent: 5090111 (1992-02-01), Lazzari
patent: 5200056 (1993-04-01), Cohen et al.

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