TWM518331U - Device having photosensitive ag paste wire - Google Patents

Description

Device with photosensitive silver paste line

This creation is about a silver paste, especially for a device with a photosensitive silver paste line.

The board is divided into a soft board and a hard board, which are transparent and opaque. Among them, the special one among the hard plates is a glass substrate, and the glass substrate can be applied to the touch panel; the PET material in the soft board can be used in many fields, for example, a touch panel, a test strip for testing, and the like.

Among the applications of touch panels and test strips, conductive silver paste is an important conductive material because it can be fabricated on substrates in a relatively low temperature manner, especially for plastic substrates such as PET. There are two main techniques for making conductive silver paste on a substrate. The first is screen printing, and the second is to use photosensitive silver paste (or silver paste). The resolution of the screen printing is poor, and the photosensitive silver paste can reach a higher resolution.

Due to the design trend of the narrow border or the borderless of the touch panel, the resolution of the photosensitive silver paste is high, and the touch panel becomes the mainstream in the line forming technology of the frame. However, at present, the development of photosensitive silver paste focuses on the research of components, and does not target applications for specific product requirements, for example, detecting the special impedance requirements of test strips. Therefore, how to apply sensitive silver paste to specific product requirements has become the direction of efforts of various manufacturers.

The device used in the photosensitive silver paste is not designed for special impedance requirements. For the special impedance requirement, the new definition defines the line width and thickness of the photosensitive silver paste to meet the specific impedance value.

The present invention provides a device for a photosensitive silver paste line comprising: a substrate and a photosensitive silver paste line. Wherein, the substrate is selected from a soft substrate or a transparent substrate; and a photosensitive silver paste line is formed on the substrate. Among them, the photosensitive silver paste line is fabricated by a lithography process, and the line width and thickness of the photosensitive silver paste line are calculated according to the impedance value, and the line width is greater than 10 micrometers.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

10‧‧‧Soft substrate

20‧‧‧Photosensitive silver paste line

30‧‧‧ glass substrate

41‧‧‧Photosensitive silver paste line

42‧‧‧ Connection point

50‧‧‧Touch panel viewing area

Fig. 1A is a top view of the first embodiment of the present invention.

Fig. 1B is a cross-sectional view showing the first embodiment of the present invention.

Figure 2 is a top view of a second embodiment of the present invention.

Please refer to FIGS. 1A and 1B, a first embodiment of the present invention, which is a test paper structure. On the flexible substrate 10 used for the test paper, a photosensitive silver paste line 20 is produced by a lithography process, and the line width and thickness are calculated according to an impedance value, wherein the line width is greater than 10 μm. Since silver particles are mixed in the silver paste, the line width is limited.

In this embodiment, the flexible substrate 10 may be made of a PET material having transparent and flexible properties. Further, the photosensitive silver paste line 20 is formed in the center of the flexible substrate 10 to constitute a conductive line of a specific impedance value.

For example, the blood glucose test strip's impedance value, controlled at 900-1k ohms (Ω), can improve the accuracy of the blood glucose meter. The design of a typical blood glucose test strip is related to the line width required by the connector of the blood glucose meter. If it can be accurately produced, the width and spacing of the gold finger and the distance from the edge of the test paper can reduce the numerical misjudgment of the blood glucose meter. Therefore, the test piece using the photosensitive silver paste line produced by the present invention can achieve a high precision impedance value, a high resolution line width, a pitch, and the like. The impedance is between 100 and 3,000 ohms, the thickness is between 5 and 10 microns, and the line width is between 10 and 50 microns.

In addition, after the photosensitive silver paste line 20 is formed, a protective layer can be formed thereon to protect the photosensitive silver paste line. In the production process of many test papers, a carbon film layer is also laid on the photosensitive silver paste line as a protective layer.

Other applications for flexible substrates, such as soft boards for touch panels, can also be made with this new type.

Next, referring to FIG. 2, a second embodiment of the present invention is a touch panel structure. In this embodiment, a transparent glass substrate 30 is used to form the photosensitive silver paste line 41 thereon, and at the same time, a connection point 42 is formed. The photosensitive silver paste line 41 is connected to the transparent electrode of the visible area of the touch panel 50, and then externally connected to the touch wafer through the connection point 42. Due to the narrowing requirements of the touch panel for the frame, the line width must be made thinner and thinner, and the impedance value also has specific requirements. Therefore, the photosensitive silver paste circuit produced by the lithography process can effectively meet this demand.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention should be encompassed by the present invention. Therefore, the scope of protection of this new type is subject to the definition of the scope of the patent application.

30‧‧‧ glass substrate

41‧‧‧Photosensitive silver paste line

42‧‧‧ Connection point

50‧‧‧Touch panel viewing area

Claims (9)

A device having a photosensitive silver paste line, comprising: a substrate selected from a soft substrate or a transparent substrate; a photosensitive silver paste line formed on the substrate; and wherein the photosensitive silver paste line is In a lithography process, a line width and a thickness of the photosensitive silver paste line are calculated according to an impedance value greater than 10 microns. The device of claim 1, wherein the flexible substrate is selected from the group consisting of PET. The device of claim 1, wherein the transparent substrate is selected from a glass substrate or PET. The device of claim 3, wherein the photosensitive silver paste line is formed on a frame of the transparent substrate to form a conductive line of the impedance value. The device of claim 3, wherein the photosensitive silver paste line is formed in the center of the flexible substrate to form a conductive line of the impedance value. A device having a photosensitive silver paste line as claimed in claim 1, wherein the impedance value is between 100 and 3,000 ohms. A device having a photosensitive silver paste line as claimed in claim 1, wherein the thickness is between 5 and 10 microns. A device having a photosensitive silver paste line as claimed in claim 1, wherein the line width is between 10 and 50 microns. The device of claim 1 , further comprising: a protective layer formed on the photosensitive silver paste line.