Browse Prior Art Database

Cylindrical Film Memory

IP.com Disclosure Number: IPCOM000097473D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Bertelsen, BI: AUTHOR

Abstract

A uniform, predictable drive line impedance and a reduction in disturb sensitivity are provided in a cylindrical film memory array constructed from a double-sided circuit board having mating sections.

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Cylindrical Film Memory

A uniform, predictable drive line impedance and a reduction in disturb sensitivity are provided in a cylindrical film memory array constructed from a double-sided circuit board having mating sections.

The word drive line pattern 1 is etched into the mating face 2 of section A of the double-sided circuit board 3. After lacquering the drive line pattern, solder is applied to the edge of the unetched side. Cylindrical film element 4, having drive and sense conductors 5 and 6 respectively disposed longitudinally within the element, is placed into groove 7 provided in mating face 2. The mating section B is placed over the cylinder 8. Compressive force and heat are applied to join the sections to the tubes. The solder alloys with the magnetic material on the cylinder to form solid ground plane between word lines.

This also limits domain wall creeping to a single bit by creating a nonmagnetic region. The disturbance of bits in adjacent words by word line fields is inhibited by the shielding effect of the interposed ground plane.

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