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Addressing Method for Magnetic Memory

IP.com Disclosure Number: IPCOM000093701D
Original Publication Date: 1966-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Kump, HJ: AUTHOR [+2]

Abstract

Information storage is arranged in this magnetic memory by fabricating large numbers of thin-film bands which are divided, in turn, into words which are subdivided into tracks. Accessing of the bands and then the words is performed by an electron beam or a laser beam. The information storage medium has substrate 1 with bands of nickel-iron thin films 2...4 deposited on it. These bands are both magnetic and conductive. Each band is broken down into a plurality of words 5, 6 and 7 which can be divided into tracks. Each word has its own tab 8 and 9 containing the address for that word. The bands are suitably connected by electrical conductors 10 to address and word control circuitry 11. Circuitry 11 acts on deflection controls 12 to switch a beam of electrons 13 provided from electron gun 14.

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Addressing Method for Magnetic Memory

Information storage is arranged in this magnetic memory by fabricating large numbers of thin-film bands which are divided, in turn, into words which are subdivided into tracks. Accessing of the bands and then the words is performed by an electron beam or a laser beam. The information storage medium has substrate 1 with bands of nickel-iron thin films 2...4 deposited on it. These bands are both magnetic and conductive. Each band is broken down into a plurality of words 5, 6 and 7 which can be divided into tracks. Each word has its own tab 8 and 9 containing the address for that word. The bands are suitably connected by electrical conductors 10 to address and word control circuitry 11. Circuitry 11 acts on deflection controls 12 to switch a beam of electrons 13 provided from electron gun 14.

To obtain access for recording at a given location of the information storage medium, the electron beam 13 scans the bands 2, 3 and 4 in order, causing current to flow to circuitry 11. When the correct band is located, scanning and counting the tabs 8 and 9 occur until the correct word address is located. The beam is then servoed on the tab corner and scanning of the word, for example word 5, takes place. As the beam scans each track of the word, it is modulated to record the desired information. Readout of the information stored in the words can be accomplished with an electron beam or a laser beam.

If a laser beam is employed for accessin...