Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-08-27
1991-11-05
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
427116, 427131, G11B 542
Patent
active
050621963
ABSTRACT:
A method of manufacturing the pole pieces and the gap of magnetic heads in thin layers for computer, audio and video applications, starting from a silicon substrate, includes formation of an insulator layer on a silicon substrate followed by deposition of a metal layer on the insulator layer and of a masking resin layer on the metal layer. The substrate covered with the insulator layer and the metal layer is etched to form wells bordering a bar of a determined width and the left-over portion of the metal layer etched is removed. The etched substrate is thermally oxidized to develop a silicon oxide layer enabling the bar to be adjusted to obtain the desired gap. A conductive layer is deposited at the bottom of the wells followed by the electrolytic deposition of a magnetic material in the wells and the removal of the left-over portion of the insulator layer initially deposited on the substrate.
REFERENCES:
patent: 4837924 (1989-06-01), Lazzari
Patent Abstracts of Japan, vol. 7, No. 164 (P-211) (1309), Jul. 19, 1983, & JP-A-58 070416 (Matsushita Denki Sangyo K. K.), Apr. 26, 1983.
Romankow et al., "Batch Fabrication of Keyhole Type Magnetic Recording Heads," IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr., 1975, pp. 3446-3449.
Compagnie Europeenne de Composants Electroniques - LCC
Hall Carl E.
LandOfFree
Method of manufacturing the pole pieces and the gap of magnetic does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing the pole pieces and the gap of magnetic , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing the pole pieces and the gap of magnetic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-491737