JP2000223794A - Printed sheet and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed sheet which is used for various electronic devices, which is easy to bend and which can be bent in a desired position, and to provide its manufacturing method. SOLUTION: A printed sheet is formed in such a way that at least, either conductive layers 2 or insulating layers 3 are formed on one face or both faces of a flexible insulating film 1 by printing a flexible resin, and that a linear groove 10 in a prescribed depth is formed by a laser beam machining operation in a prescribed place on the insulating film 1 or the insulating layer 3. As a result, it is possible to obtain the printed sheet which is easy to bend and which can be bent surely in a prescribed position, and it is possible to obtain its manufacturing method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing sheet used for various electronic devices and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, with the diversification and high density of various electronic devices, they have been used for panel sheets and electroluminescent elements used for operation units and display units of these devices, or for electrical connection inside the devices. Printed sheets such as wiring boards are not only installed in a straight, flat state,
It is often mounted on a device in a bent state, and there is a demand for a device that can be easily bent and can be reliably bent at a predetermined position.

[0003] Such a conventional printing sheet will be described with reference to FIGS. 6 and 7 taking a wiring board as an example.

[0004] In order to make the configuration easy to understand, the drawings are enlarged in the thickness direction.

FIG. 6 is a perspective view of a conventional wiring board. In FIG. 6, reference numeral 1 denotes a flexible insulating film such as polyethylene terephthalate or polyimide, on which a conductive powder such as silver or carbon is dispersed. A plurality of conductive layers 2 are formed by printing with a flexible resin such as polyester or epoxy.

The electrodes 2A and 2B at both ends of the conductive layer 2
The insulating layer 3 is printed and formed on the entire surface except for the conductive layer 2 by a flexible resin such as polyester or epoxy so as to cover the conductive layer 2. The recesses 4A and 4B for facilitating bending are formed to form a wiring board.

The wiring board having the above-described structure is mounted on a device in a straight and flat state as it is.
As shown in the figure, it is bent at the recesses 4A and 4B,
The electrodes 2A and 2B are connected to an electronic circuit (not shown) inside the device, and are mounted on the device so as to make an electrical connection between the respective electronic circuits.

[0008]

However, in the above-mentioned conventional printing sheet, in addition to the insulating film 1 having a constant thickness, the number of conductive layers 2 is increased and the width of the printing sheet is large. In this case, there is a problem that it is difficult to bend at an acute angle only by the depressions 4A and 4B having a predetermined width due to the elastic force of the insulating film, and that the bending positions are apt to vary.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a printing sheet which is easy to bend and can be reliably bent at a predetermined position, and a method for manufacturing the same.

[0010]

According to the present invention, at least one of a conductive layer and an insulating layer is printed on one or both sides of a flexible insulating film using a flexible resin. The printing sheet is formed by forming a linear groove having a predetermined depth by laser processing in a predetermined portion of the insulating film or the insulating layer.

As a result, it is possible to obtain a printed sheet which can be easily bent and can be reliably bent at a predetermined position.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is characterized in that a flexible insulating film is provided on one or both sides thereof.
At least one of the conductive layer and the insulating layer was formed by printing with a flexible resin, and a linear groove having a predetermined depth was formed by laser processing at a predetermined portion of at least one of the insulating film and the insulating layer. Since a linear groove is formed at a predetermined position by laser processing, it is possible to obtain a printed sheet that can be easily bent at this position and can be reliably bent.

According to a second aspect of the present invention, in the first aspect of the invention, at least a conductive layer is formed by printing on one surface of the insulating film and a linear groove is formed on the other surface. Since the groove is formed on the surface opposite to the surface on which the print is formed, the groove can be formed linearly over the entire width of the print sheet, and a groove having an appropriate depth is provided according to the thickness of the insulating film. It has the effect of being able to.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, a linear groove is formed at a plurality of locations. It has the effect of obtaining a print sheet that can be folded in a complicated manner such as a combination, a U-shape, a Z-shape, or a bellows shape.

According to a fourth aspect of the present invention, there is provided a printing sheet according to any one of the first to third aspects, wherein the linear groove is formed in a substantially broken line shape except for the conductive layer portion. When forming a groove for bending on the surface side on which the conductive layer or the insulating layer is printed, by forming the groove substantially in a broken line, it is possible to form a linear groove without cutting the conductive layer. Have.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a printed sheet according to any one of the first to fourth aspects, wherein a linear groove having a predetermined depth is formed by laser processing. This has the effect that a printed sheet that can be easily bent and can be reliably bent at a predetermined position can be easily manufactured.

Hereinafter, a printed sheet according to an embodiment of the present invention will be described with reference to FIGS.

In addition, in order to make the configuration easy to understand, each drawing shows an enlarged size in the thickness direction.

The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

FIG. 1 is a perspective view of a wiring board according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a flexible insulating film such as polyethylene terephthalate or polyimide. A plurality of conductive layers 2 are formed by printing with a flexible resin such as polyester or epoxy in which conductive powder is dispersed.

The electrodes 2A and 2B at both ends of the conductive layer 2
The insulating layer 3 is printed and formed with a flexible resin such as polyester or epoxy so as to cover the conductive layer 2 on the entire surface except for the conductive layer 2, and a predetermined portion of the upper surface of the insulating film 1 is bent by laser processing. The wiring board is formed by forming a linear groove 10 having a predetermined depth for use.

The method of manufacturing the wiring board as described above will be described. As shown in FIG. 2, first, a sheet-like flexible insulating film 11 such as polyethylene terephthalate or polyimide having a length and width of about 500 mm is formed on the lower surface of silver. After printing and forming a plurality of conductive layers 2 with a flexible resin such as polyester or epoxy in which conductive powder such as carbon or carbon is dispersed, the conductive layer 2 is formed on the entire surface of the conductive layer 2 except for the electrodes 2A and 2B at both ends. The insulating layer 3 is formed by printing with a flexible resin such as polyester or epoxy so as to cover the insulating layer 3.

Then, a linear groove having a predetermined depth is formed by a laser beam on the upper surface of the insulating film 11, that is, on the back surface of the surface on which the conductive layer 2 and the insulating layer 3 are printed and formed, where the bending is performed when the device is mounted on a device. 10A is formed, and finally, the individual outer shapes are cut to complete the wiring board as shown in FIG.

Since the linear groove 10A is processed by a laser beam, the intensity of the laser beam is adjusted according to the material and thickness of the insulating film 11, and the depth and width of the groove 10A are appropriately adjusted. It can be.

The wiring board having the above configuration is
As shown in FIG. 3, the electrode 2 is bent at the groove 10 and
A and 2B are connected to an electronic circuit (not shown) inside the device, and are mounted on the device so as to make electrical connection between the respective electronic circuits.

As described above, according to the present embodiment, a printed sheet that can be bent along a linear groove formed by laser processing, is easily bent, and can be reliably bent at a predetermined position, and a method of manufacturing the same. Can be obtained.

Since the groove 10 is formed on the surface opposite to the surface on which the conductive layer 2 and the insulating layer 3 are formed by printing, the groove can be formed linearly over the entire width of the printed sheet and the insulating film can be formed. It is also possible to provide a groove having an appropriate depth according to the material and thickness.

Further, as shown in FIG. 4A, by forming the linear grooves 10B at a plurality of locations, the linear grooves are combined according to the mounting state to the equipment, and
Complex bending such as a U-shape, a Z-shape, or a bellows shape as shown in FIG.

In the above description, the structure in which the grooves 10 and 10B are formed on the lower surface of the insulating film 1, that is, the surface opposite to the surface on which the conductive layer 2 and the insulating layer 3 are printed is described. It goes without saying that a similar effect can be obtained by forming a groove on the surface on which the conductive layer 2 and the insulating layer 3 are printed.

As shown in FIG. 5, when a groove for bending is formed on the surface on which the conductive layer 2 and the insulating layer 3 are printed, the groove 10C is formed in a substantially broken line shape excluding the conductive layer 2 portion. By doing so, not only the insulating layer 3 but also the insulating film 1
Can be formed without cutting the conductive layer 2.

Also, depending on the procedure of the manufacturing method, the present invention can of course be carried out even if the insulating layer 3 is formed after forming the groove 10 in the insulating film 1.

Further, in the above description, a wiring board in which a conductive layer or an insulating layer is printed and formed on an insulating film has been described as an example, but the film has a conductive layer or an insulating layer such as a picture or pattern, and further, a contact or a pattern. The present invention can be applied to various printed sheets such as a panel sheet on which is formed by printing, or an electroluminescent element in which a light-transmitting electrode layer, a luminescent layer, a dielectric layer, a back electrode layer, etc. are sequentially laminated on an insulating film. It goes without saying that the invention can be implemented.

[0033]

As described above, according to the present invention, there is obtained an advantageous effect that it is possible to provide a printing sheet which can be easily bent and can be bent at a reliable position, and a method for manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wiring board according to an embodiment of the present invention;

FIG. 2 is a perspective view showing the manufacturing method.

FIG. 3 is a perspective view showing a state where the main body is bent at a groove portion which is a main part of the same.

FIG. 4 is a perspective view showing a plurality of grooves.

FIG. 5 is a perspective view showing the groove formed on an insulating layer.

FIG. 6 is a perspective view of a conventional wiring board.

FIG. 7 is a perspective view of the folded state.

[Explanation of symbols]

 1,11 insulating film 2 conductive layer 2A, 2B electrode 3 insulating layer 10, 10A, 10B, 10C groove

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E068 AC00 DA11 5E338 AA01 AA02 AA12 AA16 BB54 BB56 BB63 CC01 EE22 EE31 5F072 YY06

Claims (5)

[Claims] At least one of a conductive layer and an insulating layer is printed and formed on one or both surfaces of a flexible insulating film with a flexible resin, and at least one of the insulating film and the insulating layer is formed in a predetermined shape. A printed sheet in which a linear groove having a predetermined depth is formed by laser processing at the position (1). 2. The printed sheet according to claim 1, wherein at least a conductive layer is formed by printing on one surface of the insulating film, and a linear groove is formed on the other surface. 3. The printing sheet according to claim 1, wherein a linear groove is formed at a plurality of locations. 4. The printing sheet according to claim 1, wherein the linear groove is formed in a substantially dashed shape except for the conductive layer portion. 5. The method for manufacturing a printed sheet according to claim 1, wherein a linear groove having a predetermined depth is formed by laser processing.