manufacturing process of magnetic head and magnetic head has multiple elements in accounting

摘要

1307587 Magnetic heads INTERNATIONAL BUSINESS MACHINES CORP 24 June 1970 [2 July 1969] 30733/70 Heading G5R A multiple magnetic head is made by: (a) bonding magnetic and non-magnetic ferrite plates 15, 12 (Fig. 4) in pairs by diffusion or with a high m.p. glass, machining the magnetic plates 15 to a desired thickness and bonding the pairs into a stack using the high m.p. glass; (b) slicing the stack into wafers and bonding two such wafers 18a, 18b (Fig. 8) with lower m.p. glass fibres 24 located in grooves 22 in one wafer to define an operational gap 26; (c) cutting the assembly into bars 30 (Fig. 12) including pairs of polepieces 20 and bonding with an even lower m.p. glass to a ferrite or stacked bridge member 32 having grooves receiving windings 36; (d) machining the polepieces 20 to a desired thickness and adding conductive strips to the bridge member 32 to connect with the windings 36.