JPS60101992A - Circuit board and method of producing same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit board used in desktop electronic computers, digital watches, etc., and a method for manufacturing the same.A connector pattern for connecting a liquid crystal display device, etc. to a circuit board conventionally used in digital watches. There was a switch pattern that was opposite to the bushing switch and the bushing switch. A connector called a Nihazepla rubber connector was mounted on the connector pattern and connected to each terminal of the liquid crystal display device. Further, a conductive rubber portion was placed on a rubber sheet roller of 41 mm on the switch pattern, and the conductive rubber portion was suppressed to obtain a voltage of 74 av.

For this reason, the number of rtB products increased, and it was necessary to position the connectors and rubber seaters at predetermined positions on the circuit Ma, making assembly complicated. The thickness increases,
It completely prevented thinning.

The present invention eliminates the above nL defects, and provides a circuit board that has a small number of parts, is easy to assemble, and can be made thinner.
The present invention is intended to be used as a circuit board for a child computer on a tabletop, and is intended to be used as a circuit board for a slave computer. 1 is a cane, which is screwed to the back side. 1. i≦Constitutes the exterior body of the desktop computer together with the lid 2. A transparent display window 3 is fixed to the case 1. A display device k4 such as a liquid crystal is located inside the display window 3. The case 1 is provided with a keyboard section 5 including a numeric keypad and function keys.

A flexible printed circuit board 6 is provided inside the keyboard section 5.
is arranged, and the back side has an electrode part 7 corresponding to each key.
...is being formed. Reference numeral 8 denotes a circuit board R5, which is screwed to the case 1. A display hole 8a into which a part of the display device 4 is inserted is formed in the circuit board 8. A wiring pattern 9 is formed in the circuit board 8-A, and a part of these is formed as a display element L, It is extended to 8a and becomes connector pattern 10, and at the same time as wiring pattern 9, patterns 11a..., 11b...
A switch pattern 11 consisting of... is formed on the circuit board 8.

A rubber layer 12 for an electrically conductive electrically conductive electrically conductive connector is provided on the upper part of the pattern 10 for a connector in close contact. In addition, a rubber layer 13 that is exactly the same as the rubber layer 12 for connectors.
is provided on the opposite side of the display hole 8a, but this rubber j (
Regardless of the 13-pin electrical connection and the TRR, the display device 4 should be placed horizontally once. Further, a switch rubber layer 14 exhibiting pressure-sensitive conductivity is provided in close contact with the upper part of the switch pattern 11-. Rubber layer 12 for carp/lid, pattern 10 for connector
The electrodes are electrically connected to each electrode (not shown) of the display device 4 only in the vertical direction, and are electrically disconnected in the horizontal direction. Rubber layer 14 for the switch switch... is set to protect against disasters with the t1 electrode 7 of the flexible printed circuit board 6, and is pressed against the keyboard section 5 with a finger, etc. It becomes oily and pattern +1a and pattern 11b become O.
This results in N-shaped deafness. 15... are chip parts fixed on the circuit board B, and i6, 16 are battery contacts.

Here, a rubber layer 12 for a connector, a rubber layer 14 for a switch,
I will explain the projection method of... First, a rubber adhesive is prepared by mixing about 10% by volume of tetraelectric particles such as silver powder, carbon, and nickel powder into silicone rubber or the like. Next, this rubber adhesive is applied to the connector pattern 10 on the circuit board B by screen printing or the like. Switch pattern 11...printed on it to a thickness of about 0.1 mm to form connector rubber layer 12 and switch rubber) #1
4... All of them are formed in close contact at the same time. After that, press only the connector rubber layer 12 to a thickness of 20.0511+m.
It is 8 degrees. Note that rubber J-13 may also be pressed at the same time. Then, the connector rubber layer 12 is cured in the pressed state, and the switch rubber layers 14 are cured in the first state.

As a result, the connector rubber layer 12 becomes anisotropically conductive, being conductive only in the direction in which it is pressed, that is, in the vertical direction.
In this way, the connector rubber layer 12 and the switch rubber layer 14 are simultaneously adhered to the circuit board B using a rubber adhesive in which all conductive particles are mixed, so that the pressure-sensitive conductivity becomes i. The manufacturing process is extremely easy because only the rubber layer 12 for the connector is pressed and the rubber layer 14 for the switch is cured as it is. In addition, the rubber layer 12 for the connector, the rubber layer 14 for the switch...
. . . 1, which is provided in close contact with the circuit board 8.
Positioning is easy and assembly is easy. Further thinning is possible.

In addition, the proportion of barrel-resistant particles in rubber-based cutting is 30% by volume.
Depending on the diameter of the particle etc. in the following φ1),! It will change color accordingly. If this ratio is a little large, it may be adjusted by slightly reducing the pressing force used to obtain the anisotropically conductive material.

As stated above, according to the present invention, the rubber layer for the connector and the rubber layer for the switch are provided in close contact with the circuit board, so there is no need to properly determine the position when assembling, and misalignment can be prevented. , 6-fold which can make group W extremely easy? It can be turned into Combat 1 in VJ type.

Since the rubber layer for the double connector and the rubber layer for the switch are formed at the same time, and only the rubber layer for the connector is pressed, both rubber layers are fully cured, so manufacturing is extremely easy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention;
U and A are top views of the circuit board, and the small diagram is a bottom view of the case. 8...Circuit board 10...Connector pattern 11...Switch pattern 12...Rubber for connector) - 14...Rubber layer for switch and above Patent applicant Seikodai Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A rubber layer for connectors that exhibits anisotropic conductivity and a rubber layer for switches that exhibits pressure-sensitive conductivity are formed using a rubber adhesive mixed with conductive particles on the tops of the connector patterns and switch nodules, respectively. A circuit board characterized by the fact that the comb layer is placed in close contact with the other. (2) Form a rubber layer for a connector and a rubber layer for a switch using a rubber adhesive mixed with conductive particles on the top of each of the pattern for a connector and a turn for a switch, and press the rubber layer for a connector. A method for manufacturing a circuit board, characterized in that the switch rubber layer is cured to become anisotropically conductive, and the switch rubber layer is cured as it is to become pressure-sensitive conductive;