JPS6149657B2 - - Google Patents

Description

[Detailed description of the invention]

This invention relates to a method for accelerating dry imaging. A thin film of a metal such as aluminum, zinc or other metal or a metal compound such as cadmium sulfide, magnesium fluoride or titanium oxide on a sheet or three-dimensional substrate made of a film-forming thermoplastic polymer compound, glass or metal. and quinone, diazo, azide, or benzophenone photosensitizers and polymer compounds for binders, such as various thermoplastic synthetic resins, especially vinyl polymers or copolymers, acrylate copolymers, polyesters, cellulose derivatives, and rubbers. The photoresist film consists of a photoresist film made of a derivative or a mixture thereof, in which a dry image forming material that can reduce the interfacial adhesion between the photoresist film and the metal or metal compound thin film in the photosensitive area when exposed to light is applied through a desired pattern. The inventors have already disclosed in Japanese Patent Application No. 51-42083 (see Japanese Unexamined Patent Publication No. 52-126220) that after exposure, the photoresist film is peeled off to form a thin layer image of metal or metal compound at the photosensitive area. A patent has been applied for. This method does not require any special development processing, and the exposure requires only irradiation with sunlight, ultraviolet rays, or visible light on the short wavelength side, making it an extremely simple method.The resulting images also have high resolution, making them excellent for industrial use. This is a method. However, when carrying out this image forming method, even if the exposure is sufficient for the photochemical reaction of the photosensitizer,
It takes some time to obtain an image, and if the photosensitive film is peeled off immediately after exposure, no image is formed or the resulting image is unclear or non-uniform. As a result of various studies on the cause of this, it has been found that the humidity of the atmosphere in which the image forming material is placed after exposure has a large effect, and at the same time, the temperature also influences the time until image formation. This invention was completed based on this knowledge. Therefore, the present invention comprises a base material, a thin film of a metal or metal compound provided thereon, and a photosensitive film, and the photosensitive film is made of a polymeric compound for a binder and a quinone-based, diazo-based, azide-based, or benzophenone photosensitizer. After exposing the dry image forming material to light through a desired pattern, which can reduce the interfacial adhesion between the metal or metal compound thin film in the photosensitive area and the photosensitive film when exposed to light, the photoresist film is peeled off and the metal or metal compound in the photosensitive area is removed. Provided is a method for accelerating image formation, in which an image forming material exposed to light is held at a high temperature for a certain period of time in the presence of moisture. The following photosensitizers are preferred for use in this invention: (a) benzophenone (b) quinone photosensitizer 1,4-naphthoquinone, 2-methyl-1,4-
Naphthoquinone, anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-chloroanthraquinone or p-toluquinone, (c) Diazo photosensitizer 4-(p-tolylmercapto)-2,5-diethoxybenzenediazonium zinc chloride salt, sodium sulfate or tetrafluoroborate, zinc chloride salt of 4-(p-tolylmercapto)-2,5-dimethoxybenzenediazonium, 4-(p-methylbenzoylamino)-2,5-diethoxybenzene Zinc chloride salt of diazonium, zinc chloride salt of 4-(p-methoxybenzoylamino)-2,5-diethoxybenzenediazonium, 4-morpholino-2,
Zinc chloride salt or tetrafluoroborate of 5-diptoxybenzenediazonium, tetrafluoroborate of 4-morpholinobenzenediazonium, tetrafluoroborate of 4-pyrrolidino-3-methylbenzenediazonium, p-N , N-dimethylaminobenzenediazonium zinc chloride salt or tetrafluoroborate, p-N
-Zinc chloride salt of ethyl-N-hydroxyaminobenzenediazonium, zinc chloride salt of a condensate of sodium 1,2-diazonaphthol-5-sulfonate or 4-diazodiphenylamine sulfate and formaldehyde, (d) Azide Photosensitizer 2,6-di-(4'-azitobenzal)cyclohexanone. In this invention, when the exposed dry image forming material is maintained at high temperature in the presence of moisture to promote image formation, the higher the temperature and the higher the moisture content, in other words, the higher the humidity, the faster the image formation. Time is reduced.
However, although the image forming time can be shortened to within a few seconds at a temperature of about 80° C. or higher, such short-time processing is not industrially or economically viable because of problems in terms of processing equipment. Therefore, generally about 40 to about 80
Preferably, the treatment is carried out at °C. In addition, the desired effect can be fully exhibited within 5 minutes of treatment time. As a specific processing method, the simplest and most effective method is to immerse the exposed dry image forming material in hot water maintained at a predetermined temperature for a certain period of time.
Alternatively, expose the image-forming material to 100% relative humidity.
Alternatively, it may be left in a similar atmosphere at a desired temperature for a certain period of time. However, in this process, it is necessary to prevent moisture leakage from the apparatus, and the temperature of the atmosphere tends to fluctuate. Next, the present invention will be explained with reference to the following examples. Example Copolymer of 86% vinyl chloride, 13% vinyl acetate, and 1% maleic anhydride (Vinyrite from UCC)
20 g (commercially available as UMCH) and 20 g of 4-(p-tolylmercapto)-2,5-diethoxybenzenediazonium tetrafluoroborate (from Daito Kogyo Co., Ltd.)
A photosensitive composition solution having a solid content of 20.63% was prepared by dissolving 0.8 g (commercially available as WH-1500) in 80 g of methyl ethyl ketone. Aluminum is vacuum deposited on one side of a 100μ thick polyethylene terephthalate film to increase the film thickness.
It was set to 100mμ. The photosensitive composition solution was applied onto an aluminum thin film using a wire bar and dried at 90° C. for 1 minute to obtain an image forming material having a photosensitive film thickness of 5 μm. A positive original made of silver salt lithium film was placed in close contact with the photosensitive film and exposed to light from a 3KW arc lamp 80cm away. The substrate was then immersed in warm water and the photosensitive film was peeled off to obtain a negative image of vapor-deposited aluminum on the substrate. The following table shows the relationship between exposure time, hot water temperature, immersion time, and image development.

【table】

[Table] From the above, it is clear that the exposure time can be shortened by immersing the image forming material exposed in accordance with the present invention in hot water, and that the higher the temperature of the hot water, the shorter the immersion time. Conventionally, there was unevenness in image formation after exposure, making it difficult to obtain a good image, especially in winter when the temperature is low and humidity is low.However, with this invention, a good image is always produced by exposure, regardless of changes in external conditions. This can be obtained by appropriately selecting the time, immersion temperature and duration.

Claims (1)

[Scope of Claims] 1 Consists of a base material, a thin film of a metal or metal compound provided thereon, and a photosensitive film, the photosensitive film comprising a binder polymer compound and a quinone-based, diazo-based,
A dry image forming material made of an azide-based or benzophenone photosensitizer and capable of reducing the interfacial adhesion between the metal or metal compound thin film in the photosensitive area and the photosensitive film when exposed to light is exposed through a desired pattern, and then the photosensitive film is peeled off. 1. A method for accelerating image formation, which is characterized in that the exposed image-forming material is held at high temperature for a certain period of time in the presence of moisture. 2. The method for accelerating image formation according to claim 1, characterized in that the exposed image forming material is immersed in hot water at about 40° C. or higher for about 5 minutes or less. 3. A method for accelerating image formation according to claim 1, characterized in that the exposed image forming material is immersed in hot water at a temperature of about 48 to about 68° C. for about 5 to 180 seconds. 4. The method for accelerating image formation according to claim 1, characterized in that the image forming material after exposure is held in an atmosphere of saturated to semi-saturated humidity and about 40 to 80° C. for about 4 minutes or less.