Browse Prior Art Database

Capacitor Read Only Memory

IP.com Disclosure Number: IPCOM000095733D
Original Publication Date: 1964-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Hallstead, HJ: AUTHOR [+2]

Abstract

Uniform dielectric spacing between capacitor electrodes in a multiple capacitor structure is maintained by a constant pressure resilient pad and a uniform thickness dielectric film, regardless of curvatures in the structure.

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Capacitor Read Only Memory

Uniform dielectric spacing between capacitor electrodes in a multiple capacitor structure is maintained by a constant pressure resilient pad and a uniform thickness dielectric film, regardless of curvatures in the structure.

Each capacitor element is made up of two electrodes separated by a dielectric film. One electrode is a portion of a printed conductor 1 on electrode plate 2. The other electrode is an enlarged portion of a second conductor 3 printed on flexible capacitor electrode sheet 4. The conductors 1 on plate 2 and conductors 3 on Sheet 4 are at right angles to one another, their intersections defining capacitor elements. The capacitance of the element is a function of electrode area and dielectric spacing.

Dielectric spacing is maintained constant by dielectric film 5, which separates electrodes 1 and 3 when plate 2 and sheet 4 are driven together under pressure from resilient pad 6. Differences of electrode areas provide discernible differences in capacitance, which allow the structure to function as a capacitor read only memory, with values 1 and 0 related to high and low capacitances.

Capacitor electrode plate 2 is of rigid glass, backed by a steel plate, not shown. Dielectric film 5 is polyester plastic of 1 mil thickness. Flexible capacitor electrode sheet 3 is flexible glass, or can alternatively be a record card with certain capacitor electrodes punched out. Resilient pad 6 is foam rubber or an air pillow.

Non-uniform...