JPS61219954A - Formation of pattern by liquid crystal panel - Google Patents

Abstract

PURPOSE:To form a pattern image in a short time by drawing the pattern image on a liquid crystal surface of a liquid crystal unit by supplying a plotting data to a control device, and executing an exposure by making a photoresist substrate adhere closely, and printing the pattern image onto the substrate. CONSTITUTION:A pattern plotting data 1 is inputted to a liquid crystal unit 10 through a control device 9. Subsequently, a pattern image is drawn on a liquid crystal surface of a liquid crystal unit 10. A substrate 7 coated with a photoresist is made to adhere closely to this liquid crystal surface, a light 8 is irradiated through the liquid crystal unit 10 from the opposite side of the substrate adherence surface, and a pattern is exposed on the substrate 7. Accordingly, the pattern is formed by using the liquid crystal unit 10 as a photomask, therefore, it is unnecessary to make an art work film, and it can be executed in a short time to plot the pattern.

Description

[Detailed Description of the Invention] [Summary] A method of forming a pattern using a liquid crystal panel as a photomask, which involves inputting pattern drawing data of a printed board to a liquid crystal unit and drawing a pattern image on the liquid crystal surface. The pattern image is printed directly onto the substrate as a photomask for the artwork.

[Industrial application field]

The present invention relates to a pattern forming method used for printing images on printed circuit boards, etc., and in particular uses a liquid crystal unit instead of an artwork film, making it possible to directly expose a pattern image drawn on the liquid crystal surface based on drawing data onto the printed circuit board. The present invention relates to a pattern forming method using a liquid crystal panel.

Generally, electronic devices are constructed by mounting circuit components on a printed wiring board. A printed wiring board is a wiring diagram that represents electrical wiring that connects circuit components on an insulating substrate based on a circuit design.

In order to manufacture the above-mentioned printed wiring board, first, a film original of a circuit pattern is prepared from a design drawing.

In the DA method, this film original plate is usually made into a film by using an automatic drafting tape that is automatically created using an electronic computer. Next, using this film, a copper-clad laminate coated with a photosensitizer is exposed and baked and subjected to etching and other treatments to produce a printed wiring board.

Recently, as computers have become more sophisticated, printed circuit boards have become denser and larger. Along with this, the number of laminated layers of printed circuit boards has increased and patterns have become finer. As a result, wiring based on circuit design has become more complex, and it takes a long time to draw patterns for artwork films (printed circuit board photomasks) for each layer of printed circuit boards. There is a need for a pattern forming method that allows pattern drawing to be performed in a short time.

[Conventional technology]

Conventionally, when printing a pattern image onto a printed circuit board, as shown in FIG. Patterns are sequentially exposed and drawn on the film 5 using a mechanical shutter of 0N10FF.

■Film 5 drawn above (artwork film)
The original film is obtained through processes such as developing, printing, editing, and corrections. In the actual work, this original film is copied and used as the work film 6.

(2) A substrate 7 coated with 7-photoresist is closely attached to the working film 6, and a pattern image is exposed on the substrate by light irradiation from a light source 8.

[Problem that the invention seeks to solve]

Recently, as computers have become more sophisticated, printed circuit boards have become denser and larger, and accordingly, the number of laminated layers of printed circuit boards has increased and patterns have become finer.

Conventional artwork films used in the manufacture of printed circuit boards are produced by moving the optical head 4 of a dedicated drawing machine 3 using an XY block method using pattern drawing data based on circuit design, and by using an optical spatula and a mechanical shutter of 0N10FF. ,
Patterns are sequentially exposed on the film 5 to create an artwork film. Therefore, it takes a long time to draw patterns for artwork films.

In addition, highly specialized equipment is required for the creation process such as developing, editing, and correcting the artwork film, as well as for inspection, which further requires additional steps and costs.

The present invention was created in view of these points.
The purpose of the present invention is to provide a pattern forming method using a liquid crystal panel that can omit the step of creating an artwork film, reduce the need for artwork-specific equipment, and shorten the manufacturing process.

[Means for solving problems]

FIG. 1 shows a detailed illustration of an embodiment of the invention.

In FIG. 1, numeral 1 indicates pattern drawing data, which is wiring diagram data based on circuit design. 9 is a control device that inputs manually generated pattern drawing data (pattern images of each layer of the printed board) to the liquid crystal unit 10;
Control the display on top.

The drawn liquid crystal unit 10 is used as a printed circuit board photomask, and is brought into close contact with the substrate 7 coated with photoresist, and the liquid crystal unit 10 is exposed by light irradiation from the light source 8.
The pattern image A drawn on the substrate 7 is exposed and printed on the substrate 7.

[Effect]

That is, pattern drawing data 1 is input to the liquid crystal unit 10 via the control device 9, and a pattern image is drawn on the liquid crystal surface of the liquid crystal unit 10. The drawn liquid crystal surface of the liquid crystal unit 10 and the substrate 7 coated with photoresist are brought into close contact with each other, and light is irradiated from the opposite direction of the substrate contact surface through the liquid crystal unit eyes O to expose a pattern image on the substrate 7. .

The present invention eliminates the need for conventional artwork films by using the liquid crystal unit 10 as a photomask to form patterns. As a result, pattern drawing and film production steps for making the film are eliminated.

〔Example〕

FIG. 1 is a perspective view of an embodiment of the present invention.

Note that common symbols throughout all figures indicate the same objects.

In the figure, 1 is pattern drawing data, which is wiring diagram data based on circuit design. 9 is a control device which inputs the input pattern drawing data (pattern images of each layer of the printed board) to the liquid crystal unit 10 and controls the display on the liquid crystal unit 1-10.

Further, 7 is a substrate coated with each layer of photoresist.

The substrate 7 is brought into close contact with the liquid crystal image display surface of the liquid crystal unit 10.

Light from a light source 8 is irradiated through the liquid crystal unit 10 from the opposite direction to the surface in close contact with the substrate to expose a pattern image on the substrate 7.

In this way, the pattern drawing data 1 is transferred to the liquid crystal unit 1-10.
The pattern image A drawn on the artwork film (
By exposing the substrate 7 to light using the work film 6), a pattern image can be formed in a short time.

The size of the liquid crystal unit 10 is adjusted to match the size of the substrate 7 (for example, 500 m x 500 m), and when the pattern drawing data 1 has been drawn on the liquid crystal surface of the liquid crystal unit 10 by the control device 9, it is cleared and the next base Vi , 7 can also be carried out automatically by sending in contact exposure.

Note that if there is a problem with the refractive index of light passing through the liquid crystal unit 10, it is sufficient to correct the pattern drawing data 1 in advance.

As described above, in exposing the pattern drawing data to the substrate 7,
Since the conventional artwork film (working film 6) is not required, the film production process is omitted, and the need for artwork-dedicated equipment and the board manufacturing process can be shortened.

In addition, there is no need to store artwork film, and printing on substrates can be efficiently processed online by creating a database of drawing data.

〔Effect of the invention〕

As described above, according to the present invention, by drawing pattern drawing data on the liquid crystal surface of the liquid crystal unit, the step of creating an artwork film can be omitted, the dedicated equipment can be reduced, and the printed circuit board manufacturing process can be shortened. Furthermore, there is no need for artwork film storage and online processing is possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional pattern forming method using a printed circuit board photomask. In the figure, 1 is pattern drawing data, 7 is a substrate, 8 is a light source, 9 is a control device, ,Lel'l'lJJ! ttiJLJJ] f3'j' crazy 1ffl easy I R Irako q print Zon Otafitmass 71 2yo 5 no\° turn shape FE, 斌q sharptan η figure % 2 Dango

Claims (1)

[Claims] Drawing data (1) is input to a liquid crystal unit (10) via a control device (9), a pattern image, etc. is drawn on the liquid crystal surface, and the liquid crystal drawing surface is coated with a photoresist (7). A method of forming a pattern using a liquid crystal panel that is brought into close contact with a substrate (7) and irradiated with light through a liquid crystal unit (10) from a direction opposite to the surface in close contact with the substrate, thereby making it possible to expose a pattern image, etc. onto the substrate (7).