JPS633301B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-precision glass original plate using penetrating glass ink, which is applied to printed circuit boards, IC photomasks, liquid crystal panels, name plates, etc.

[Conventional technology]

Conventionally, film base plates have been used as this type of base plate for a long time, but due to the material of the film, film is easily bent, distorted, and damaged, attracts dirt due to static electricity, and has a large coefficient of expansion. This is something I cannot be satisfied with.

However, in addition to the above, chrome glass original plates with chromium vapor-deposited are used, but these chrome glass original plates have higher dimensional accuracy than films, are less affected by humidity and temperature, and have physical strength against vertical and horizontal loads. The chromium-deposited film has almost the same coefficient of expansion as glass, so it is very stable, and is therefore far more durable than film. It also has excellent optical reproducibility compared to the original plate, and it also reduces the generation of static electricity. It has various advantages such as less dust adhesion and easy removal, but since the thickness of the chromium evaporated film ranges from 500 Å to 1000 Å, it is easy to chip or damage during handling. It has drawbacks such as the presence of holes, and also has the disadvantage of being expensive.

[Problem to be solved]

In the present invention, a penetrating glass ink is applied to a clean glass plate surface and washed to form a penetrating layer flush with the glass plate, and then metal vapor deposition or The above-mentioned disadvantages of the conventional method are overcome by means of applying a chemical silvering layer, applying a photosensitive photoresist on the upper surface of the layer, placing a negative film on the upper surface, and developing the film by exposing it to ultraviolet light.

[Means to solve]

That is, amber-colored penetrating glass ink is uniformly applied to the surface of a cleaned glass plate by screen printing, and then it is dried at 200°C to remove gas from the ink, and then the ink is heated to 450°C. After baking at a temperature of ~600°C, the ink on the top surface is removed by washing, and a portion of the applied ink forms a penetrating layer deeper than the surface of the glass plate.In other words, the glass plate becomes flush with the glass plate with penetrating ink. The ink permeable surface becomes a UV opaque surface.

Therefore, after forming a chemical silvering layer on the entire upper surface of the glass plate, including the surface where the ink penetrated, a coating layer of a corrosion-resistant agent was further applied on the upper surface of the layer, and then a negative film was placed on the upper surface of the coating layer. When the film is placed and irradiated with ultraviolet light while shielded from light, the resist is developed and the pattern on the film surface becomes a clearly etched pattern on the glass plate.

The photo glass original plate is thus obtained by removing masking, resist, chemical silver, etc., and washing and finishing it by a conventional method.

[Effect]

Recently, high precision has been required for this type of original plate, but the old film is not physically satisfied with the problem of dust adhesion due to static electricity generation as mentioned above, and even chrome glass plates have pinholes as mentioned above. However, the original plate of the present invention has no risk of generating static electricity, and since the surface is flush and has a permeation layer, it is disadvantageous in terms of cost and is not suitable for mass production. It has many excellent advantages not found in the conventional original plates mentioned above, such as being resistant to scratches, having no pinholes due to its composition, completely blocking ultraviolet rays, being unaffected by temperature and humidity, and being suitable for mass production. It is something to do.

〔Example〕

As shown in FIG. 1A, a uniform layer of amber-colored penetrating glass ink (Silver Stain, manufactured by Okuno Pharmaceutical Co., Ltd.) is coated on the surface of the glass plate 1, which has been wiped clean in advance, by screen printing. 2 was prepared and then dried at a temperature of 200°C to remove gas from the ink, and then placed in a high-temperature electric furnace.
By baking at a temperature of 450°C to 600°C and then washing to remove the ink on the upper surface, a portion of the ink in the coating layer penetrates into the permeation layer 2' at a depth of 7μ to 15μ from the surface of the glass plate 1. That is, the metal ions←→ are fixed by the sodium ions, and become flush with the glass plate 1, the glass plate 1' with penetrating ink (see figure B), and the surface of the ink-penetrated area 2' becomes an ultraviolet opaque surface. .
Therefore, as shown in FIG. 1C, after forming a chemical silvering layer 3 on the entire upper surface of the glass plate 1' including the surface of the ink penetrating portion 2', a photosensitive photoresist was further applied as a corrosion resistant agent on the upper surface of the layer. Coating layer 4 is provided (Fig. 1D
After that, a negative film 5 is placed on the upper surface of the coating layer as shown in FIG. On the other hand, etching with chemical silver produces a clear etched pattern 6'. (See Figure 2F) Furthermore, etching the penetration area 2' by 7μ to 15μ with hydrofluoric acid results in a thickness of 6''. (See Figure 2G) In this way, masking, resist, chemical silver, etc. This photo glass original plate is obtained by removing and washing the glass plate. (See Figure 2 G) As an application of this method, the surface of the above-mentioned permeable glass plate is plated with chrome and a resist is applied as a corrosion-resistant film. By etching the chrome film without baking and developing, and then etching the permeated areas with hydrofluoric acid, high-precision engravings can be made that have the advantages of a chrome glass original plate and a permeable ink photo original plate.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Figure 1A is a perspective view of a state in which penetrating glass ink has been applied to the glass surface by screen printing according to the present invention, pre-drying and high-temperature baking. Figure B is a perspective view of the state in which the ink on the upper surface has been washed away and an ink permeation layer flush with this is formed on the upper surface of the glass plate. Figure 2D is a perspective view of a state in which a coating layer or a metal vapor deposited layer has been formed, Figure 2D is a perspective view of a state in which a photosensitive photoresist is applied on the same chemical silver surface, and Figure 2E is a perspective view of a state in which a photoresist is coated on the same photoresist. A perspective view showing the condition of a positive film placed and exposed to ultraviolet rays; Figure F is a partially cutaway perspective view of the same resist developed and chemically etched; Figure G is a perspective view of the glass-penetrated area etched with hydrofluoric acid. FIG. 2 is a partially cutaway perspective view of the original plate of the present invention after masking, resist, and chemical silver have been removed and cleaned. 1 is a glass plate, 2 is a coating layer of penetrating glass ink,
2' is a permeation layer, 3 is a chemical silver coating layer, 4 is a photosensitive photoresist, 5 is a negative film, 6 is a pattern, 6'
6" is an etched pattern, and 6" is an etched pattern etched into the penetrating glass.

Claims (1)

[Claims] 1 Apply penetrating glass ink to the surface of a clean glass plate by screen printing, and after pre-drying, bake at high temperature and wash to form an ink penetrating layer flush with the glass surface, and then remove the ink penetrating layer. A metal vapor deposition or chemical silvering layer is provided on the surface of the glass plate containing the metal, a photosensitive photoresist is applied on the upper surface of the layer, a negative film is placed on the upper surface of the photoresist, and the resist is developed and exposed to ultraviolet light. A penetrating glass ink characterized in that it is obtained by etching chemical silver, etching the glass penetrating layer with hydrofluoric acid, and then washing and finishing by removing masking, resist, chemical silver, etc. using a conventional method. A method for manufacturing a colored photo glass original plate.