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Barrier Layer Suitable for Accepting Dichroic Sensitizer Particles

IP.com Disclosure Number: IPCOM000075603D
Original Publication Date: 1971-Oct-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Chadwell, RJ: AUTHOR [+2]

Abstract

In order for a dichroic photoconductor to be truly dichroic, there must necessarily be well-applied and oriented dichroic sensitizer particles for transmission and absorption of exposure light. In order to apply and orient these dichroic sensitizer particles, a suitable surface for the application and orientation of these particles is necessary. A suitable surface can be a film applied specifically for this purpose and, when formed of a material which is insensitive to solvent attack, may act further as a barrier layer.

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Barrier Layer Suitable for Accepting Dichroic Sensitizer Particles

In order for a dichroic photoconductor to be truly dichroic, there must necessarily be well-applied and oriented dichroic sensitizer particles for transmission and absorption of exposure light. In order to apply and orient these dichroic sensitizer particles, a suitable surface for the application and orientation of these particles is necessary. A suitable surface can be a film applied specifically for this purpose and, when formed of a material which is insensitive to solvent attack, may act further as a barrier layer.

It has been found that a formulation of approximately 75% ELVANOL* (polyvinyl alcohol) and approximately 25% polyvinyl-pyrrolidone may be used as a barrier layer. The layer accepts the dichroic sensitizer and permits orientation while, at the same time, resisting solvent attack. The above percentages are considered optimum, however, the percentage of PVP may be varied between 5 and 50%. By varying the PVP concentration, there will result in some change in solvent resistance of the total barrier layer.

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