JP2010207703A - Needle type dispenser coating needle and liquid transfer method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating needle and a coating method, capable of making a large amount of liquid be attached and held by the coating needle every time, performing three-dimensional coating for which the film thickness of the coated liquid is thick as a result, and reducing the number of times of coating as well. <P>SOLUTION: On the needle tip of the coating needle 1 for a needle type dispenser, a projection 2 having a diameter smaller than the diameter of the tip is provided. The length of the projection 2 is 5-100 μm, the diameter is ϕ10-ϕ80 μm, and the material of the coating needle 1 and the projection 2 is a metal or glass based material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a liquid transfer mechanism and method using a needle-type dispenser, and more particularly to a coating needle and a liquid transfer method capable of transferring a liquid in a larger amount and three-dimensionally.

In the case of liquid transfer using a conventional application needle, the tip diameter of the application needle is selected and used in accordance with the application diameter of the transfer liquid. Usually, the tip of the application needle is processed to be flat so that the liquid is adhered and held efficiently. In this method, a very small amount of liquid (liquid material) is adhered and held at the tip, and the needle tip is brought into contact with or close to the liquid application surface to transfer the liquid. There is a problem that a large amount of liquid cannot be adhered and held, and the liquid cannot be transferred three-dimensionally. In addition, when transferred to the same point twice, the thickness increases and the image may become three-dimensional, but there is a problem that the coating diameter increases.

In consideration of the above problems, there has been proposed a liquid application needle shape having a recess (storage part) at the tip of the application needle in order to transfer a large amount of liquid at a time. (For example, see Patent Document 1)
The prior patent documents are shown below.
JP 2006-276350 A

Patent Document 1 holds more liquid in a recess provided at the tip of a fine application needle,
The purpose is to transfer a large amount of liquid. However, because the needle tip shape is complex, it is difficult to finely process, and the liquid that can be used is limited to low-viscosity liquids.
It has been difficult to three-dimensionally transfer a highly viscous liquid.

The present invention has been made to solve the above problems, and the invention according to claim 1 is a coating needle for a needle-type dispenser, and has a protrusion having a diameter smaller than the tip diameter at the tip of the needle. The protrusion length from the tip of the coating needle is 5 to 100 μm.
An application needle characterized by the above is provided.

Because the liquid after the liquid transfer was not three-dimensional at the tip of the application needle, which was a conventional flat surface, multiple application operations were required to increase the film thickness. Providing a circular protrusion of 5 to 100 μm increases the volume of the coating solution to be adhered and held, and has a feature that the coating diameter after deposition does not increase. Further, the three-dimensional liquid transfer can be performed by one application, and the number of times of application, which is necessary a plurality of times for applying the liquid, can be reduced as compared with the conventional technique.

The invention according to claim 2 is the application needle according to claim 1, wherein the material of the application needle is a metal or glass-based material, and the workability of the tip of the application needle is improved and the material stability is improved. Considering the reduction of damage to the coated surface and the needle tip cleaning properties after use, the coating liquid and the cleaning liquid for removing the liquid have solvent resistance even when the cleaning liquid becomes an organic solvent system. Item 2. The application needle according to Item 1.

The invention according to claim 3 is characterized in that the tip shape of the application needle in contact with or close to the liquid application surface is circular and has a diameter of φ10 to φ80 μm.
By adopting the above-mentioned diameter dimensions, it is possible to attach and hold a larger amount of liquid on the tip of the application needle, so that a three-dimensional liquid application with a small application diameter but a large application amount Can be done. The tip shape of the protrusion may be circular or polygonal.

According to a fourth aspect of the present invention, when the application needle according to any one of the first to third aspects is used, the liquid is adhered and held on the needle tip protrusion, and the application needle protrusion is brought into contact with or close to the liquid application surface. The present invention provides a method for three-dimensionally transferring a liquid adhered to and held by a needle, and enables the liquid to be three-dimensionally transferred to an application surface using the application needle of the present invention. .

According to the present invention, when a high-viscosity liquid is adhered and held on the tip of the application needle and the liquid is transferred to the application surface, even if the needle tip diameter is the same diameter, it is approximately 1 compared with the conventional needle tip flat shape. A coating amount increase of 5 to 5 times was expected. Since the diameter of the entire application needle is small, a high three-dimensional application is possible without changing the application diameter. In addition, the number of times of application at the same location has been reduced to 2/3 to 1/5 of the conventional number, so that the processing time can be shortened and the coating liquid can be made thicker.

In an example of the test result, 100 to 500 Pa. Using a liquid with a viscosity of s, when the needle tip shape is circular φ100 μm, protrusion length 50 μm, protrusion diameter φ20 μm, the coating amount increases approximately 4 times compared to the conventional coating amount, and the target liquid film thickness is reached. Conventionally, four or more coatings have been conventionally required, but the target liquid film thickness was reached by one coating by the method of the present invention.

In another example of the test results, when a liquid having a viscosity of 10 to 70 Pa · s is used and the needle tip shape is a circular φ80 μm, a protruding portion length of 20 μm, and a protruding portion diameter of φ40 μm, it is approximately 2 compared to the conventional coating amount. The application amount has doubled, and it has been necessary to apply twice before reaching the target liquid film thickness, but the target liquid film thickness was reached by one application by the method of the present invention. In addition, protrusion part length is 5 micrometers or less, 100 micrometers or more,
In addition, it was found that the liquid adhesion holding amount decreases when the diameter of the tip of the raised portion is φ10 μm or less and φ80 μm or more.

Since the processing time required for correction is greatly shortened due to the drastic decrease in the number of times of application, it is a very effective method when a large number of corrections are made.

Furthermore, even when the desired application diameter is small, by using a projection with a small needle tip diameter, it is possible to apply a three-dimensional liquid with a thickness while the application diameter is small, and also from the point of fine liquid application, Very effective.

  The application needle of the present invention will be described in detail with reference to the drawings along the embodiments.

1 (a), (b), (c), (d), and (e) show examples of the application needle shape of claims 1, 2, and 3 of the present invention. FIG. 2 shows the liquid level after application. FIG. 4 shows a liquid cross-sectional state after application by a conventional application needle, but the liquid surface cross-sectional state according to the present invention shown in FIG. 2 is a thick film with an increase in application amount with respect to the same needle tip size as compared with the conventional application needle. Is possible.

FIG. 3 (f) shows the tip shape of a conventional application needle. As shown in FIG. 5, the tip of the needle tip is circular, and the contact surface with the work to which the liquid is attached is flat as shown in FIG. ing. Therefore, the amount of liquid that adheres to the tip of the needle depends on the surface area of the flat surface. When the same liquid is used, there is no method other than increasing the surface area to increase the amount of adhering and holding, with a small diameter. It is not suitable for liquid application.

Moreover, even if the surface area of the tip is simply increased, the amount of adhesion tends to be proportional, and the amount of adhesion cannot be increased significantly. Furthermore, a significant increase in liquid film pressure cannot be expected.

FIG. 3 (g) is a view showing a conventional application needle given as a reference. It is described in the reference literature that by providing the liquid storage space 4 in the conventional tip flat portion, the surface area to which the liquid adheres at the tip increases and a space for storing the liquid is secured. With this structure, a liquid with a low viscosity will be effective, but with a liquid with a high viscosity, the storage space is not replenished with liquid, and as a result, the coating amount cannot be increased.

FIGS. 1A to 1E are a top view and a side view showing the present invention according to claims 1, 2, and 3, respectively. A protrusion is provided at the tip of the application needle, and the length is 5 to 100 μm. A liquid mainly adheres to the side surface of the protrusion, and can hold a larger amount of liquid than a conventional application needle having a flat surface. As a result, a thick three-dimensional application is possible.

The shape of the application needle may be tapered as it goes toward the tip, or may be a straight shape.

The tip diameter of the protrusion needs to be smaller than the diameter of the application needle. Regarding the shape, it may be a tapered shape or a straight shape as it goes toward the tip.

As shown in claim 2, in any of the application needles of FIGS. 1 (a) to 1 (e), there is no material deterioration even if an organic solvent liquid is used by making the material a metal or glass. The adhesion of the liquid to the needle and the coating property to the liquid application surface are stable, and furthermore, the needle tip after application can be easily cleaned using an organic solvent, and deterioration due to the organic solvent can be prevented.

FIG. 2 is a view showing the cross-sectional shape of the coating liquid when the high-viscosity liquid is coated with the coating needle of the present invention. Since the liquid that can be attached and held on the needle tip increases due to the relationship between the diameter and length of the tip of the application needle tip, the amount of application increases with a single application, and the liquid film thickness on the liquid application surface increases. It is possible to reach the three-dimensional target film thickness 10 by the number of times of application reduced as compared with the prior art, regardless of the needle tip diameter. FIG. 4 shows the liquid cross-sectional shape after application in the conventional shape, but the film thickness of the present invention can be made approximately 1.5 to 5 times larger than that.

In addition, by applying the liquid using the application needle having the protrusions having the shapes as shown in FIGS. 1 (a) to 1 (e), the liquid shape can be applied with a small number of applications without increasing the application liquid area. The special effect that the target film thickness 10 of the liquid is obtained is obtained.

As an application example of the present invention, the present invention can be widely used for the application of a small diameter and large capacity of an adhesive, the application of a fine wiring of a metal paste, and correction using other repair application needles.

It is the upper side figure and side view which show the example of a shape of the needle | hook for liquid application | coating of this invention. It is a side view which shows the Example of the liquid sectional drawing apply | coated with the needle for liquid application by this invention. It is the top view and side view which show the Example of the needle for liquid application by a prior art example. It is a side view which shows the Example of the liquid sectional drawing apply | coated with the conventional needle for liquid application. It is a figure which shows the example of a test result at the time of changing protrusion part length, making protrusion part tip diameter constant. It is a figure which shows the example of a test result at the time of changing protrusion part tip diameter and changing protrusion part tip diameter.

1 coating needle 2 protrusion 3 coating needle tip (when viewed from the side)
4 Application needle tip recess (reservoir)
5 Application needle tip (when viewed from above)
6 Liquid cross section after application (large application diameter)
7 Liquid cross section after application (medium diameter)
8 Liquid cross section after coating (small coating diameter)
9 Glass substrate 1 0 ... Target film thickness of liquid

Claims (4)

The application needle for a needle dispenser has a tapered or straight projection having a diameter smaller than the tip diameter at the tip of the needle, and the length of the projection from the tip of the application needle is 5 to 100 μm. An application needle characterized by. The material of the application needle is a metal or a glass-based material.
The application needle as described. The tip of the protrusion that is in contact with or close to the liquid application surface of the application needle is circular or polygonal and has a diameter of φ10 to φ80 μm.
The application needle as described. A liquid is attached to and held on the protrusion at the tip of the application needle when the application needle according to any one of claims 1 to 3 is used, and the application needle is brought into contact with or close to the liquid application surface. A method for three-dimensionally transferring a liquid adhered to and held on the surface.

Images