Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-04-29
1989-06-13
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
51318, 51326, G11B 542
Patent
active
048379239
ABSTRACT:
A process for fabricating magnetic transducing heads includes successive grinding, lapping and finishing steps. The ferrite cores of the transducing heads are rough cut with a silicone carbide grinding wheel, to an excess over desired final throat height equal to approximately one-half the nominal diameter of the grinding wheel grit. The core and supporting pads then are placed on a soft tin or lead rotating lapping plate for removing substantially all of the excess. Finally, the pads and cores are hand-finished on a stationary plate or soft tin, copper or lead. A diamond slurry used during lapping and final finishing, has a controlled alkaline pH in order to simultaneously chemically etch and polish the cores.
REFERENCES:
patent: 3229355 (1966-01-01), Hluszko
patent: 3321872 (1967-05-01), Lindstrom
patent: 3485608 (1969-12-01), Cecil
patent: 3821815 (1974-06-01), Abbott et al.
patent: 4279102 (1981-07-01), Hennenfent et al.
patent: 4511942 (1985-04-01), Valstyn
patent: 4599827 (1986-07-01), Goodwin
patent: 4670972 (1987-06-01), Sakakima
Namba et al., "Float Polishing of Mn-Zn Ferrites and Characteristics of Finished Surfaces" Dept. of Precision Engineering, Tokyo pp. 1017-1022 1980.
Namba et al., "Ultrafine Finishing of Ceramics and Metals by Float Polishing", Dept. of Precision Engineering, pp. 171-179.
Brar Amarjit S.
Mims Jimmie E.
Sharma Jagdish P.
Billion Richard E.
Hall Carl E.
Heller III Edward P.
Magnetic Peripherals Inc.
Niebuhr Frederick W.
LandOfFree
Surface finishing for magnetic transducers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface finishing for magnetic transducers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface finishing for magnetic transducers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1267053