KR20040041828A - DERO Machine for dick film by coating or screen printing - Google Patents

Abstract

PURPOSE: A printed circuit board, a fabrication method of a flat device, and a DERO machine apparatus are provided to improve a quality of manufactures and to reduce a defect ratio by improving a film quality of a functional material. CONSTITUTION: A printed circuit board and a fabrication method of a flat device comprise a first step of forming a functional material at a plate, a second step of passing through a DERO machine after performing the first step, and a third step of drying after performing the second step. A film deposition process forms a thick film above 5 micro meter from a paste or an ink using a screen printing or a table coater. The DERO machine heats the plate on a uniform hot plate using a temperature from 30-120°C.

Description

Manufacture method of printed circuit board and planar device and street machine equipment {DERO Machine for dick film by coating or screen printing}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the manufacture of printed circuit boards and flat panel devices, and more particularly, to a construction and application method of a manufacturing apparatus (hereinafter referred to as a DERO machine) for improving the quality of a thick film manufactured by using a printing mask. As is well known, printed circuit boards and flat panel devices are thin functional devices formed by stacking several functional layers on a single substrate.

As a method of forming such a functional layer on a substrate, a thin film method represented by photolithography is used, but the thick film method has a process cost of less than 1/10 as compared to the thin film method. Thick film methods such as coater or screen printing are preferred.

The dual printing method is a method of printing on the substrate P through the printing mask M by pressing a paste (T) of the functional layer with a squeeze (Q) or the like as shown in FIG. Here, the printing mask (M) is coated with a resin layer (L) containing a photosensitive material on a metal mesh (S), such as stainless steel yarn finely woven into hundreds of mesh (mesh) as shown in FIG. Photolithography forms a transmission window O through which the paste T can pass. In the case of pattern printing, the width d of the transmission window O corresponds to the pattern width of the functional layer to be formed. In the case of non-precision pattern printing, the transmissive window O through which the paste T can pass is formed by coating the above-described resin layer and photo-etching the designated area by the necessary section. And the screen mask is manufactured so that the paste which escaped through this transmission window is printed.

Paste used in the printing process is made by mixing the material needed to form the functional layer with the glass powder and suspending it in a volatile solvent to give the fluidity necessary for printing. In addition, the forming of the functional film is carried out by a process of printing and drying and firing them in a pattern or non-pattern through a printing screen. In general, the printed film is affected by the state of the screen or the shape of the squeeze. Accordingly, if the quality of the material used primarily is not good, the surface of the printed functional layer is not uniform and irregularities are generated. Such irregularities are caused by the release of organic components included in the printing paste during the firing process. It becomes more nonuniform. If the viscosity of the printing paste is adjusted here, printing is easy and the surface of the printing layer is uniform. However, if the viscosity is low, the printing paste becomes more wetting. Therefore, the viscosity of the printing paste cannot be lowered to any below. will be.

The advantages of screen printing are that the process is simpler than other processes, ② the process equipment is inexpensive, ③ the material has a low loss of material, and ④ screen materials such as screen masks are widely used. Despite these advantages, screen printing is not applied to the manufacturing process of relatively precise parts because it does not overcome the disadvantages of the material. This may include a poor screen mask and a lack of understanding about Paste. In the case of large screens, pattern or non-pattern type, defects such as clogging of the mesh during use are inevitable. However, this can be overcome by a simple technique. In addition, defects such as mesh stains due to paste characteristics can be alleviated during drying and firing processes.

An object of the present invention is to introduce the configuration and function of the machine as a new equipment that can minimize the defects of the printing film can occur during the above-described user material or process in order to maximize the advantages of screen printing.

3 to 6 is a back plate manufacturing process diagram of the surface discharge AC PDP according to an embodiment of the present invention

Description of the main parts of the drawing

10: glass substrate

11: back electrode

12: White back layer

The present invention is a pre-drying treatment technique for improving the film surface state of the functional material by improving the film surface state of the functional material after the functional material is formed by using the road machine, and by discharging unnecessary bubbles inside.

As a characteristic method of the present invention for achieving the above technical problem, a method of forming a functional material on a substrate; After performing the first step, the second step of passing through the boulevard machine; After performing the second step, it comprises a third step of drying.

Hereinafter, preferred embodiments of the present invention will be introduced in order to enable those skilled in the art to more easily carry out the present invention.

4 to 6 illustrate a manufacturing process of a white back layer of a surface discharge type AC PDP back plate according to an embodiment of the present invention, which will be described below with reference to the drawings.

In the process according to the present embodiment, first, as shown in FIG. 4, the address electrode 11 is formed on one surface of the glass substrate 10 for the back plate. In this case, all of the previously published methods such as a printing method, a photosensitive electrode method, and a thin film deposition method may be applied to form the address electrode 11, and when the firing process is required, the firing process is performed.

Next, as shown in FIG. 5, the back dielectric layer material 12 is coated on the entire structure of the glass substrate 10 on which the address electrode 11 is formed. The backside dielectric material 12 may use a liquid paste. In addition, the thickness of the rear dielectric layer material 12 is determined in consideration of the height of the rear dielectric layer to be formed.

Subsequently, as shown in FIG. 3, after applying the rear dielectric layer material 12, the pre-treatment is carried out by passing the machine as the glass substrate 10 is placed on the hot plate H.

Next, as shown in FIG. 6, development is performed to dry the rear dielectric layer 12, and if necessary, firing is performed at a predetermined temperature or more to form the rear dielectric layer 12.

When the above process is carried out, as shown in FIG. 3, the film quality of the rear dielectric layer is reduced by reducing the unevenness of the surface of the rear dielectric layer material using the boulevard machine to form the rear dielectric layer 12, and releasing bubbles therein. To improve.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The present invention described above can improve the film quality of the functional material when forming the functional material of the printed circuit board and the planar device to facilitate the formation of the functional material, reduce the defective rate, and can improve the quality of the product can be expected. have.

Claims (5)

Forming a functional material on the substrate; After performing the first step, the second step of passing through the boulevard machine; Method of manufacturing a printed circuit board and a flat panel display device comprising a third step of drying after performing the second step The method of claim 1, In the process of forming Paste or Ink into a thick film (thick film) of 5 μm or more by using screen printing or a table coater, and forming the film, a dry pretreatment apparatus characterized by applying a machine as shown in FIG. 3 is used. Manufacturing method The method of claim 2, In the pre-drying of a substrate coated with a thick film by printing or coater, the machine is placed on a uniform hot plate and heated evenly to a temperature of 30 ° C to 120 ° C. The method of claim 2, Machine that is designed to heat up and down by adding a device that can blow tunnel type hot air in addition to placing a board on a hot plate The method according to claim 2 and 4, Machine that is made to place Air Knife at the top to smooth the flow of Paste or Ink by adding the board on the hot plate and the device that blows the tunnel type hot air.