SU828164A1 - Thermoplastic target - Google Patents

Description

one

The invention relates to the field of holography, to the means of optical recording and processing of information and can be used in holographic memory and computing technology.

The known thermoplastic target 1 of the charger consists of a substrate with conductive cells deposited on its surface from SnO and a system of current-carrying paths. The target is covered with a thermoplastic layer and ensures the locality of the appearance and erasure of holograms.

However, such a target is not sufficiently reliable due to the presence of a large number of contact groups, as well as conductive tracks located between the target cells and having a cross section, which leads to their rapid burning out. In addition, the current paths occupy additional space on the target surface, reducing its compactness,

The closest to the technical essence of the invention is a thermoplastic target consisting of a substrate with mutually perpendicular grids deposited on it, covered with thermoplastic carrier 2. This target provides locality of appearance and erasure of information, however, it is not reliable enough because it does not provide locality heating.

In addition, the use of high energies to heat the target element leads to accelerated aging of the thermoplastic layer, to a more rapid destruction of the target, peeling off of the target layers, etc.

The purpose of the invention is to improve the reliability of a thermoplastic target that provides locally occurrence and erasure of information due to the raster heating only at the junction points of two tracks.

This is achieved by the fact that in a thermoplastic target consisting of 1 SUGGESTON with deposited on mutually perpendicular grids, covered with a loss of a plastic carrier, a layer of conductor is applied between the conductive grids, the resistivity of which is 10-100 times higher

5 resistance of conductive gratings of the raster.

A thermoplastic target (see drawing consists of an insulating substrate I, onto which a vacuum method

0 spraying through the mask is applied a network of tracks 2 made of any conductive material, for example AI. A layer of conductor 3 is applied to the system of tracks 2 through masks so that the contact pads on both sides of the tracks remain free from this layer, which serve as contacts for applying voltage during operation of the target. This layer is made, for example, from ZnS, CdS. A system of tracks 4 is applied on top of layer 3; the system of tracks 2 is similar and perpendicular to them.

The target thus produced is coated with a layer of photosensitive thermoplastic carrier 5, for example, a copolymer of 9-vinylcarbazole with octyl methacrylate. sensitized TNF to the visible area.

The thermoplastic target works as follows.

On the surface of a photosensitive thermoplastic carrier, a potential charge is created in the corona field and exposed to a split laser beam, producing a latent electrostatic image in accordance with the recorded information. This electrostatic image is developed locally when the nagoraver is in place at the junction of the tracks (Table 1). The image is fixed when the target area cools.

Two types of thermoplastic targets are investigated - with a dielectric layer between the intersecting gratings and the conductor. The research results are summarized in the table.

Claims (1)

SUMMARY OF THE INVENTION A thermoplastic target consisting of a substrate with mutually perpendicular gratings deposited on it, coated with a thermoplastic carrier, characterized in that, in order to increase reliability, a conductor layer is located between the gratings, the resistivity of which is 10-100 times higher than the conductive raster gratings.