JPS5833120B2 - Kirokuzairiyou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording material for recording high-density energy light.

In addition to silver salt photosensitive materials, recording materials that record high-density energy light such as lasers have conventionally used materials as recording layers that undergo thermal deformation such as melting, evaporation, or aggregation due to the thermal energy of light irradiation. The one used was known (
For example, Applied Physics, Vol. 42, A;, 11.19
73, pp. 1052-1066).

As a method for recording on such a recording material, a method has generally been proposed in which information is recorded by converting the information into an electrical signal and irradiating the electrical signal with a laser beam modulated in accordance with the signal.

Such a recording system has advantages in terms of speed of information processing and economic efficiency of the sensitive material, and unlike photosensitive recording materials such as silver salt, the recording material used is Suitable materials include metals, dyes, and plastics that utilize thermal (heat mode) recording that does not require treatment.

Furthermore, these recording materials allow images to be obtained in real time and are inexpensive.

Such recording materials are, for example, M, L, Leven
e etal * Record of 11-th
Symp, on Electron, Ion
and La-5er Beam Technology
y69, Electro-nics, (M
ar, 18.1968) 50. ,D.

Maydan: BSTJ, 50 (1971) 17
61. .

C, 0, Carlson; 5science 154
(1966) 1550, etc.

However, since these recording materials have low recording sensitivity during high-speed scanning, they require a high-output light source, making the recording apparatus expensive and large.

Therefore, it is necessary to increase the recording sensitivity during high-speed scanning, and as one attempt to do so, the
No. 9 states that a recording material having a three-layer structure of selenium, bismuth, and germanium increases recording sensitivity.

However, since this method uses selenium, bismuth, etc., there is a risk of pollution, and there are also many problems in terms of recorded image quality.

The purpose of the present invention is, first, to provide a recording material for recording information provided by high-density energy light such as a laser, and second, to provide a recording material with high recording sensitivity. The third objective is to provide a recording material with clear reproduction image quality, and the fourth objective is to provide a recording material that is free from the risk of causing pollution.

The above-mentioned objects are characterized in that a recording layer provided on a support and capable of causing thermal deformation upon irradiation with high-density energy light is composed of a multilayer or a mixture of metal and germanium monosulfide; was a distant relative of

The recording layer of the present invention comprises a mixture of metal and germanium monosulfide.

Metals include Mg, A, /, Ti, Cr, Mn
, Fe.

Co, Rh, Ni, Pd, Pt, Cu, A
g, Au.

One or more selected from Zn, Ga, In, Ge, Sn, Pb, Bi, Te, etc. can be used in combination.

Among these metals, Mg. A, /, , Mn, Zn,
In, Sn, etc. are preferably used in the present invention.

A mixture of these metals and germanium monosulfide is created using various methods such as codeposition, vapor deposition, sputtering, and ion blasting.

The thickness of the recording layer composed of a mixture of metal and germanium monosulfide may be any thickness that provides the necessary density for an image.

For example, to obtain a transmission density D=2.0, approximately 100
A thickness of A to 200 OA is required, but it will naturally vary depending on the type of metal used.

The volume ratio of metal to germanium monosulfide in the recording layer of the present invention is 15:1 to 1:4, and the preferable range is 12:
1 to 1:3, the most preferred range is 7:1 to 1:2.

In addition, the preferable range of the total film thickness is 150λ to 1500, and the most preferable range is 200A to 1000.

Note that two or more types of metals may be used in combination.

In the present invention, a mixture of the above metals and germanium monosulfide is used in the recording layer.

Two or more metals may be used in combination.

A feature of the present invention is that the same effect is obtained even when the recording light (laser) is irradiated from the support side, so that a recording material with a wide range of uses is formed in combination with hardware.

In the figure, the recording light (laser) is indicated by an arrow.

When the recording material of the present invention prepared as described above is irradiated with high-density energy light, it exhibits extremely superior recording sensitivity than a recording material having only a metal thin film.

Furthermore, since the recording material of the present invention has very excellent recording image quality, the reproduced image is also extremely clear.

Furthermore, the recording material of the present invention has no danger of causing pollution because its constituent elements are harmless to the human body.

The present invention will be explained in more detail with reference to Examples below.

Example 1 A composition as shown in Table 1 was deposited on a polyethylene terephthalate support having a thickness of 175 microns at a vacuum degree of 5×10.
A recording material having the same layer structure as shown in FIG.

At this time, 600 evaporated films were formed for each of the co-deposited layers of metal and germanium monosulfide.

An argon laser (wavelength 4880
), the recording beam diameter was 10 microns, and the line scanning speed was 0.
．． Line scanning recording was performed while changing the speed in the range of 5 M/sec to 19 M/sec.

As is clear from Table 1, the recording medium in which the metal of the present invention and germanium monosulfide are co-deposited can achieve a 2 to 10 times increase in ASA equivalent sensitivity compared to a recording medium containing only a metal thin film.

Furthermore, when the recording traces of the recording material (Sample A2, 4, 6, 8° 10.12) using the mixture of the metal of the present invention and germanium monosulfide were observed under 400 times magnification, it was found that the recording traces were converted into thermal energy. Traces of metal melted and condensed by the laser beam were clearly white.

However, in the recording material not according to the invention (sample AI, 3), the presence of small particles of metal on this trace was observed, which degraded the quality of the recorded image.

[Brief explanation of drawings]

The figure shows the layer structure of a recording material obtained according to the present invention. In the figure, 1 indicates a support and 3 indicates a metal. 2 is germanium monosulfide,

Claims (1)

[Claims] 1. A recording layer provided on a support, which is removed from the irradiated area by evaporation and/or melting by high-density energy light irradiation, and includes a mixture of metal and germanium monosulfide. material.