Browse Prior Art Database

Head Assembly for Flexible Disk Applications

IP.com Disclosure Number: IPCOM000043182D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Cox, AR: AUTHOR [+5]

Abstract

A transducer head for flexible disk applications is described providing a flat transducing surface depressed within a stabilizing ring which stabilizes the motion of the disk over the head. Manufacture is by bonding the stabilizer onto a central post incorporating a magnetic or optical transducer and lapping stabilizer to the required tolerance. Figs. 1 and 2 show sections through typical assemblies having a central flat topped transducer element. The transducer may be a read/ write element for magnetic recording or a plano front element of a lens assembly for optical recording by laser. The central flat surface is surrounded by and slightly below a stabilizing ring. The stabilizer is toroidal (Fig. 1) or flat topped (Fig. 2).

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Head Assembly for Flexible Disk Applications

A transducer head for flexible disk applications is described providing a flat transducing surface depressed within a stabilizing ring which stabilizes the motion of the disk over the head. Manufacture is by bonding the stabilizer onto a central post incorporating a magnetic or optical transducer and lapping stabilizer to the required tolerance. Figs. 1 and 2 show sections through typical assemblies having a central flat topped transducer element. The transducer may be a read/ write element for magnetic recording or a plano front element of a lens assembly for optical recording by laser. The central flat surface is surrounded by and slightly below a stabilizing ring. The stabilizer is toroidal (Fig. 1) or flat topped (Fig. 2). When a flexible disk rotates in close proximity to the stabilizer, aerodynamic forces are developed which draw the disk into the depression at the center of the stabilizer where the pressure becomes sub-ambient. At equilibrium, the surface of the disk moves in close proximity to the flat surface of the transducer. A lubricating film of air or other substance in the disk formulation prevents damage to the disk. The spacing between the head and disk may be controlled by incorporating longitudinal slots in the head surface. These slots do not damage the disk when the head is yawed in a machine having a rotary head positioning system. Also the head assembly described provides virtually constant flyin...