Browse Prior Art Database

Protective Electrode for a Large Area Capacitor Structure

IP.com Disclosure Number: IPCOM000045553D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Dove, DB: AUTHOR [+2]

Abstract

This article describes a method of electrode fabrication, and a structure for a large-area electroluminescent panel in a storage CRT. The method and improved structure helps to prevent catastrophic electrical breakdown due to the high capacitance associated with such a large-area panel.

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Protective Electrode for a Large Area Capacitor Structure

This article describes a method of electrode fabrication, and a structure for a large-area electroluminescent panel in a storage CRT. The method and improved structure helps to prevent catastrophic electrical breakdown due to the high capacitance associated with such a large-area panel.

An electroluminescent panel is being considered for use as an active faceplate for a storage CRT. It consists of a structure in the form of a capacitor of large area (on the order of 1000 cm/2/) and large capacitance (several MuF). A localized electrical breakdown event in such a structure gives rise to local destruction of the capacitor, resulting in a visible defect or gives rise to a propagating defect that destroys a large fraction of the panel. The problem is that a localized breakdown event is subjected to the large stored energy of the total structure, resulting in a very destructive event.

We propose a method of electrode fabrication that controls the extent of destruction due to localized electrical breakdown. The breakdown areas may be small enough to be invisible to the unaided eye. In addition, a high degree of protection is provided against propagating or catastrophic breakdown. In the present method, one of the electrode layers is prepared in the form of an array of small regions interconnected by small bridges of electrode material, as shown in Fig. 1. In Fig. 1, region A is connected to adjoining regions by bridges, such as
B. In the present realization the crosses C...