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Batch Fabricated Discrete Bit Multi Aperture Plates

IP.com Disclosure Number: IPCOM000095379D
Original Publication Date: 1965-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Rockhey, H: AUTHOR [+4]

Abstract

Sheets of green ferrite are flexible, machineable, and thermoplastic. Furthermore sheets of green ferrite can be made to adhere to certain other materials by applying heat and pressure or pressure alone. The memory is batch fabricated by a method that takes advantage of these properties. In the drawing different parts of the memory are shown at different steps in the method. Green ceramic sheet 2 is formed with holes 3 arranged in the pattern of the desired memory array. Sheet 2 is then overlaid with a green ferrite sheet. A toroidal punch is aligned with each hole 3. The punch is operated to cut toroids 4 from the ferrite sheet and to force each toroid 4 into the corresponding hole in sheet 2. The device is then sintered. In sintering the ferrite is bonded to sheet 2.

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Batch Fabricated Discrete Bit Multi Aperture Plates

Sheets of green ferrite are flexible, machineable, and thermoplastic. Furthermore sheets of green ferrite can be made to adhere to certain other materials by applying heat and pressure or pressure alone. The memory is batch fabricated by a method that takes advantage of these properties. In the drawing different parts of the memory are shown at different steps in the method. Green ceramic sheet 2 is formed with holes 3 arranged in the pattern of the desired memory array. Sheet 2 is then overlaid with a green ferrite sheet. A toroidal punch is aligned with each hole 3. The punch is operated to cut toroids 4 from the ferrite sheet and to force each toroid 4 into the corresponding hole in sheet 2. The device is then sintered. In sintering the ferrite is bonded to sheet 2.

Alternately the toroids can be formed in two steps. First, a ferrite blank is punched into each hole in the ceramic sheet. Secondly holes are punched in the blanks to form the toroids. A suitable material for sheet 2 is a green nonmagnetic ferrite.

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