JPS62190791A - Wiring board and connector - 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] [Industrial Application Field] The present invention is applied to a connector technology that electrically connects a large number of wires on a wiring board to a large number of wires on another wiring board at once. It is about effective techniques.

[Prior art]

Conventionally, multiple wires for transmitting high frequency signals on a printed wiring board are connected to respective connector contacts.

It is electrically connected to many wirings of other wiring boards by the following method. (1) A method of electrically connecting a connector contact on one printed wiring board with a contact on the other printed wiring board by bringing a spring liquid point into contact with it. (2) A method in which protrusions of solder, gold, etc. are formed on the connector contacts on one printed wiring board, and the contacts of the other printed wiring board are brought into pressure contact with the protrusions to electrically connect the two.

The method (1) above will be explained using FIG. 4.

A lead wire 2 is electrically connected to the connector contact 3 on the printed wiring board 1 . The wiring 4 to which the lead wiring 2 is connected is provided on another structure (for example, a printed wiring board). The wiring 4 is electrically connected to a contact member 5 having spring properties with adhesive metal such as solder. The connector contact 3 and the contact member 5 are connected in an electrically stable state using an envelope (not shown) that allows the spring of the contact member 5 to be appropriately bent within its elastic limit. ing.

Next, the method (2) will be explained using FIG. 5. On the printed wiring board 1, a connector contact 3 and a lead-out wiring 2 electrically connected to the connector contact 3 are provided. The connector contact 3 is provided with a contact projection member 6 by soldering, gold plating, or the like. A connector contact 8 and a lead-out wiring 4 electrically connected to the connector contact 8 are connected to a mating printed wiring board 7 to which the contact projection member 6 is electrically connected. The respective lead wires 2 and 4 are connected to the printed wiring boards 1 and 7.
After aligning so that the contact protrusion member 6 and the connector contact 8 are in contact with each other, the surface wiring boards 1 and 7 are fixed with screws or the like.
An electrical connection is established by fixing the

[Problem that the invention seeks to solve]

However, in a multi-terminal connector with this type of structure, the contact member 5 having spring properties also serves as an electrical conductor element.
There is a problem in that a bent structure is disadvantageous in terms of electrical performance such as capacitance and inductance.

In addition, there are variations in the position of the contact member 5 and the wiring 4 when they are connected, bulges in the adhesive metal, and variations in the shape of the adhesive member 5, so the connector contact spacing must be set to 1 dimension to account for this, and the contact member In order to ensure elasticity, a relatively large area is required, and therefore, there is a problem in that it is not possible to realize high-density connector contacts commensurate with the fine pattern dimensions of the two lead-out wiring areas.

In addition, in the method (2) above, since it is necessary to form the contact projection member 6 on the connector contact 3, the pattern processing dimensions of the connector contact 3 cannot be made very small. Since the wires are routed around, there is a problem in that it is not possible to increase the wiring density in the area of the two lead-out wirings. In addition, the height of the contact projection member 6 tends to vary, and when a large number of connector contacts 3 are connected to other connector contacts 8 at the same time, the contact pressure will vary and the reliability of the electrical connection will decrease. There was a problem. The present invention has been made to solve the above problems, and its purpose is to reduce unnecessary stray capacitance in a wiring board and its connector that have connector contacts that transmit a large number of high-frequency signals. Our goal is to provide the technology that makes it possible.

Another object of the present invention is to provide a technology that allows connector contacts of wiring boards to be formed at high density and to connect wiring boards in an electrically stable state.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means for solving problems]

A brief overview of typical inventions disclosed in this application is as follows.

In other words, a connector contact protrusion made of a thick conductive thin film is provided on one side of a flexible insulating substrate, and a lead-out wiring made of a thin conductive thin film is provided on the other side. A wiring board having a connector contact, characterized in that a through-hole wiring is provided for electrically connecting the connector contact protrusion and the lead-out wiring through a through-hole formed in the board. In addition, with the connector contacts of this wiring board and the contacts of another wiring board in contact, a pressure member is inserted on the former wiring board side to fix both wiring boards by interposing an elastic member having compressive elasticity. This is a connector for mounting a wiring board, which is characterized by the following.

[Effect]

The wiring board of the present application has a large number of protrusions for connector contacts on a different surface from the lead-out wiring, so there is no need to provide wasted space between the connector protrusions when routing the lead-out wires, etc. Contact protrusions can be formed independently and with high density. Furthermore, since the lead-out wiring is thin, it is possible to perform fine processing, and a large number of wirings can be formed between the contacts.

In addition, in the connector of the present application, the protrusion member for the connector contact is configured with a thick film thickness to provide flexibility to the board, and when it is in contact with the contact of another wiring board, pressure is applied by interposing an elastic member. Since both wiring boards are fixed with the member, reliable electrical contact can be made at each contact point, and the reliability of the connection portion can be improved.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be specifically described using the drawings.

In addition, in all the figures for explaining the embodiment, parts having the same functions are given the same reference numerals, and repeated explanations thereof will be omitted.

FIG. 1 is a perspective view showing the structure of a printed wiring board having connector contacts according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1.

In FIGS. 1 and 2, 10 is a printed wiring board. This printed wiring board 10 is made of a flexible and insulating board (for example, polyimide resin).
A connector contact protrusion 11 made of a thick conductive thin film is provided on the front surface, and an extraction wiring 12 having a thinner film thickness than the connector contact protrusion 11 is provided on the back surface. The film thickness of this lead-out wiring 12 is the same as that of the internal wiring connected to the lead-out wiring 12. The connector contact protrusion 11 and the lead-out wiring 12 are made of, for example, a copper thin film. Through-holes 13 are provided in the central portion of the contact protrusion 11 and in the laminated portion of the insulating substrate and the lead-out wiring 12, respectively. Through-hole wiring 15 is provided on the surfaces of the substrate, lead-out wiring 12 and connector contact protrusion 11 within this through-hole 13 . The through-hole wiring 15 is formed of a plated layer of gold or the like. This through-hole wiring 15 is configured to electrically connect the connector contact projection member 11 and the lead-out wiring 12.

The through-hole wiring worker 5 has a protruding member 11 for connector contact.
It extends to cover the connector contact layer 14.

Since the connector contact protrusions 11 are provided on a different substrate surface from the lead-out wiring 12, there is no need to consider the area in which the lead-out wiring 12 is routed, and the spacing between them can be independently made high-density. can. Further, the lead-out wiring 12 is provided on a different board surface from the connector contact protrusion 1■,
Moreover, since the film thickness is thin, it can be constructed with high density.

FIG. 3 is a cross-sectional developed view showing a configuration in which the printed wiring board 10 having the connector contacts of the present embodiment is brought into contact with the contacts (pads) of another printed wiring board 16 to form a connector.

In FIG. 3, reference numeral 16 denotes a mating printed wiring board electrically connected to the connector contact layer 14 of the connector contact protrusion 11. As shown in FIG. One surface of this printed wiring board 16 has contacts (pads) connected to a plurality of lead-out wirings 17.
is provided, and a contact layer 18 is provided on the contact surface thereof.

The connector of this embodiment has a printed wiring board 10.
With the connector contact layer 14 of the printed wiring board 16 in contact with the contact layer 18 of the printed wiring board 16, a pressure member 19 having compressive elasticity is placed on the printed wiring board 10 side, and then printing is performed using a rigid presser member 20. The structure is such that the wiring boards 10 and 16 are fixed, and each lead-out wiring 12 on the printed wiring board 10 and each wiring 17 on the printed wiring board 16 are electrically connected. The pressure member 19 is made of, for example, an insulating material such as a rubber material or sponge, or a conductive material whose portion that contacts the wiring 12 is provided with an insulating property.

At this time, the connector contact member 11 of each printed wiring board 10 independently absorbs slight variations in shape 9 dimensions due to the flexibility of the board and the compressive elasticity of the pressure member 19, and Since reliable electrical contact can be made with the terminal, electrical reliability can be improved.

In addition, the printed wiring board 10 and the connector having the connector contacts are provided with the elasticity necessary to maintain the connection with the printed wiring board 16 not in the conductive material that transmits the signal, but in the board side or the outer circumference. The printed wiring board 16 and the like can be electrically connected through a short route, and high frequency characteristics can be improved.

Further, since the printed wiring board and connector structure having the connector contacts as in this embodiment can be constructed using a series of printed wiring manufacturing techniques, mass production and cost reduction can be achieved.

The present invention has been specifically explained above using examples, but
It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

〔Effect of the invention〕

As described above, according to the present invention, the following effects can be obtained.

(1) A connector contact protrusion made of a thick conductive thin film is provided on one side of a flexible and insulating substrate, and a thin conductive thin film is made on the other side. By providing lead-out wiring and through-hole wiring that electrically connects the connector contact projections and the lead-out wiring through through holes formed on the board, a large number of connector contact projections can be connected to the lead-out wiring. Since they are provided on a different surface from the wiring, the connector contact protrusions can be formed with high density.

(2) By adding a configuration to the configuration of (1) above, which includes a pressure member having compressive elasticity and a pressing member, and fixing the contact points of separate printed wiring boards in a state where they are in contact with each other, the contact member Since reliable contact can be made for each contact without being affected by variations in the shape of the connector, the electrical reliability of the connector can be improved.

(3) According to (2) above, a connector with low high frequency characteristics can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of a wiring board having connector contacts according to an embodiment of the present invention, and FIG. 2 is an A of FIG.
3 is a sectional view taken along cutting line A; FIG. 3 is a developed sectional view showing the configuration of a connector formed by bringing the printed wiring board shown in FIG. 1 into contact with another printed wiring board; 5 and 5 are diagrams for explaining problems with conventional connector contacts. In the figure, 10...Printed wiring board, 11...Protruding member for connector contact, 12.17... Wiring for extraction, 13
... Through hole, 14 ... Connector contact layer, 15
... Through-hole wiring, 16... Other printed wiring board, 18... Contact layer, 19... Pressure member, 20...
...It is a holding member.

Claims (4)

[Claims] (1) A connector contact protrusion made of a thick conductive thin film is provided on one side of a flexible and insulating substrate, and a thin conductive thin film is made on the other side. 1. A wiring board comprising a lead-out wiring and a through-hole wiring for electrically connecting the connector contact protrusion and the lead-out wiring through a through-hole formed in the board. (2) The wiring board according to claim 1, wherein the wiring board has a large number of lead-out wirings and connector contact protrusions. (3) The wiring board according to claim 1 or 2, wherein the through-hole wiring is a plating layer formed on the surface of the board inside the through-hole. (4) A connector contact protrusion made of a thick conductive thin film is provided on one side of a flexible and insulating substrate, and a thin conductive thin film is made on the other side. A first wiring board provided with a lead-out wiring and a through-hole wiring for electrically connecting the connector contact protrusion and the lead-out wiring through a through hole formed in the board, the first wiring board With the connector contact protrusion of and the contact connected to the lead-out wiring of the other second wiring board in contact with each other, a pressure member having compressive elasticity is interposed on the first wiring board side. A connector for mounting a wiring board, characterized in that a holding member is provided for fixing the first and second wiring boards.