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Deformographic Storage Display Tube Target Precoat

IP.com Disclosure Number: IPCOM000079462D
Original Publication Date: 1973-Jul-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Halperin, BI: AUTHOR [+2]

Abstract

Deformographic storage display tubes (DSDT) are described in U. S. Patents 3,626,084 and 3,676,588. As shown therein, the target assembly has inter alia a mica substrate to which is applied a deformable dielectric member.

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Deformographic Storage Display Tube Target Precoat

Deformographic storage display tubes (DSDT) are described in U. S. Patents 3,626,084 and 3,676,588. As shown therein, the target assembly has inter alia a mica substrate to which is applied a deformable dielectric member.

In order to improve the wetting characteristics of the mica substrate so that the deformable material will have a more uniform surface on the substrate, the substrate is precoated with an aliphatic hydrocarbon solution of allyl trimethoxy silane containing an alkyl titanate catalyst.

Typically, the target substrate is mounted on a spin table and a quantity (e.g.
1.5 cubic centimeters for a 4.5 inch diameter mica substrate) of the precoat is applied to the center of the mica. The target substrate and precoat are covered to prevent evaporation. The table, and hence, the target substrate and precoat are spun above a rate of 800 rpm so that a uniform thin layer of precoat is applied across the surface of the mica substrate.

It has been found that using the precoat in this manner will prevent fracture of the mica substrate or granulation of the mica substrate surface.

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