JPH03126289A - Card edge connector of printed wiring board and manufacture thereof - Google Patents

Abstract

PURPOSE:To eliminate damage when inserting and extracting a connector part and improved life by performing print-wiring of an electrode terminal continuously from the wiring surface of a printed-wiring board to the tip surface of an insertion side onto the cut slant surface of a card edge connector. CONSTITUTION:A gradient surface 5a which is gradient toward the inner side as it advances toward an end face 5b is formed in wedge shape by performing cutting-machining of the edge part of a copper-clad laminated plate 4. Covering is made with a copper layer 11 by plating, a plating resist 12 is applied to a part which is level with a wiring surface 2a, a seal 13 for resist is applied only to the gradient surface 5a which does not abut on a connector contact, and other parts are covered with a copper layer 14 by plating. A pattern consisting of the part of an electrode terminal 6 and the wiring on a solder layer 15 are solder-plated, the area on the copper layer 14 is covered with a solder layer 15, and the plating resist 12 and the seal 13 are eliminated. Copper layers 11 and 14 excluding the solder-plated part are corroded by etching an insulating substance 4a is exposed for the gradient surface 5a at a part which does not abut on the connector contact. Then, the solder surface 15 is released and nickel and gold layers 16 are plated onto the copper layer 14. The tip is cut and the area between the upper and lower surfaces is separated, and solder resist printing is performed for completion.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Fields> The present invention relates to a card that is integrally formed at one end of a printed wiring board used in electronic equipment, etc., and is inserted and fitted between connector contacts on an external circuit side. This article relates to an edge connector and its manufacturing method.

<Prior Art> FIG. 8 shows an example of a conventional electrical connection structure.

In this connection structure, a card edge connector 53 integrally formed at one end (edge part) of a printed wiring board 52 is directly inserted and fitted as a plug part into a connector 51 as a socket part provided on the electronic device main body 50 side. It is structured to match. Inside the connector 51, a plurality of connector contacts 54 are wired across a passage into which the CardEdge connector 53 is inserted.On the other hand, on the CardEdge connector 53 side, there are electrodes corresponding to the connector contacts 54. Terminals 55 are printed and wired. When the card edge connector 53 is inserted into the connector 51, the connector contacts 54 are pressed against the electrode terminals 55 to establish an electrical connection.

In addition, as shown in FIGS. 9 and 10, the edge of the card edge connector 53 is cut into a wedge shape so that it can be easily inserted between the connector contacts 54, and the edge is cut inward toward the tip. An inclined surface is provided at the insertion side tip. Note that this printed wiring board 52 is formed of a copper-clad laminate in which copper foil 252 is laminated on the upper and lower surfaces of an insulator 152.

Then, the card edge connector 53 is made from this copper clad laminate.
In order to make a printed wiring board 52 having a copper clad laminate, the copper foil 252 on the insulator 152 in the copper clad laminate is etched to form a wiring pattern together with the electrode terminal 55, and then the edges are cut to form the inclined surface 56. I am trying to set it up.

Therefore, the inclined surface 5 of this card edge connector 53
6, the electrode terminal 55 is not formed and the insulator 152 is exposed.

<Problem to be Solved by the Invention> For this reason, when the card edge connector 53 is repeatedly inserted and removed from the connector 51, the inclined surface 56, which has been cut and has a rough surface, and the corner portion 57 of the electrode terminal 55 are removed. Therefore, the contact surface of the connector contact 54 is easily damaged.
There was a problem that shortened the lifespan.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a card edge connector and a method for manufacturing the same, which can reduce damage during attachment and detachment of the connector portion and improve the life of the connector.

<Means for Solving the Problems> In order to achieve the above object, the card edge connector according to the present invention continuously connects the printed wiring T8i terminals inward as they proceed in the direction in which they are inserted between the connectors. It is provided continuously from the wiring surface of the printed wiring board to almost the insertion side end surface along the sloped surface formed by cutting the wiring board so as to be inclined.

<Operation> According to this configuration, electrode terminals are printed and wired continuously on the cut inclined surface from the wiring surface of the printed wiring board to the insertion side tip surface. Therefore, the entire part of the card edge connector that comes into contact when it is inserted between the mating connector contacts is covered with the electrode terminal, so the contact part on the cut slope is the electrode terminal. It is formed smoothly and the sliding friction force with the connector contact can be reduced.

<Example> Hereinafter, an example of the present invention will be described in detail using the drawings.

Fig. 1 is a schematic perspective view of a printed wiring board having a card edge connector according to the present invention, and Fig. 2 is a schematic perspective view of the printed wiring board shown in Fig. 1.
FIG. 3 is an enlarged sectional view of a portion corresponding to the line ``---'' in FIG. 1.

The card edge connector 1 is integrally formed at one end of the printed wiring board 2, and is a connector for the device main body or connection cable (not shown), similar to the card edge connector 53 shown in FIGS. 8 to 10. It is designed to be able to be removably inserted into and attached to a mating elastic connector contact 3 (see FIG. 2).

Further, the card edge connector 1 has a wedge-shaped distal end portion cut and formed, and an inclined surface 5a that slopes inward toward the distal end on the upper and lower surfaces of the edge portion 5 on the insertion side.
is provided. Electrode terminals 6 are provided on the portions of the inclined surface 5a (hereinafter referred to as "terminal portions") that come into contact with the mating connector contacts 3 when the connectors are inserted and removed. The electrode terminal 6 extends from a wiring pattern (not shown) formed on the wiring surface 2a of the printed wiring board 2 on which various electronic components are mounted, along the inclined surface 5a to a position adjacent to the insertion side end surface 5b. It is provided in a state where the printed wiring is loosely continuous and coated, and is formed in such a way that the sliding friction between it and the connector contact 3 is reduced (see Fig. 2). As shown in FIG. 3, the part of the inclined surface 5a that is inserted and removed without coming into contact with the mating connector contact 3 is not provided with an electrode terminal 6, but is simply formed into a wedge shape with an insulator 4. be put into a state.

Therefore, in the card edge connector 1 formed in this way, the electrode terminals 6 corresponding to the portions that come into contact with the mating connector contacts 3 are coated.
Since the printed wiring is continuous along the inclined surface 5a from the wiring surface 2a of the printed wiring board 2 to the position adjacent to the insertion side end surface 5b, the frictional force can be reduced by the electrode terminals 6, making it easy to attach and detach. It is possible to reduce the sliding friction force generated between the connector contact 3 and the connector contact 3 when the connector is inserted or removed. This reduces damage between the card edge connector 1 and the connector contacts 3, reduces skewer wear, and improves service life.

Note that the electrode terminals 6 formed in the card edge connector 1 of the present invention are inserted from the wiring surface 2a of the printed wiring board 2 to the insertion side end surface 5b, which is a portion that does not come into contact with the connector contacts 3 when inserted.
It may be formed by coating, etching, or other methods as long as it is formed continuously along the inclined surface 5b up to a position adjacent to . Further, the electrode terminals 6 may be plated with copper or gold thereafter.

Next, in FIG. 4, FIG. 7, FIG. 5A, and FIG. 5B, electrode terminals 6 are continuously formed along the inclined surface 5a from the wiring surface 2a of the printed wiring board 2 to a position adjacent to the insertion side end surface 5b. This figure shows an example of a method for manufacturing a cart edge connector. FIG. 4 shows the manufacturing process, and FIG. 5A shows the part that comes into contact with the mating connector contact,
In other words, the terminal portion corresponding to the line ■-■ in FIG. 1 is shown in chronological order in correspondence with the manufacturing process in FIG.
Figure B shows the structural state of the part that does not come into contact with the mating connector contact, that is, the part corresponding to the ■-■ line in Figure 1, in chronological order, corresponding to the manufacturing process in Figure 4. . In FIGS. 4, 5A, and 5B, the same reference numerals as in FIGS. 1 to 3 indicate the same parts as in FIGS. 1 to 3.

Further, this manufacturing method uses the "subtractive method" which is often used when forming printed wiring boards, and this manufacturing process will be explained next.

First, a material for forming the printed wiring board 2 provided with the card edge connector 1 is prepared, that is, a copper-clad laminate 4 made of an insulator 4a and copper foil 4b stretched on the upper and lower surfaces thereof.

This copper-clad laminate 4 is shown in Fig. 5A A1 and Fig. 58 81.
As shown in the figures, the insertion tip side is not yet provided with an inclined surface.

In the first step, cutting is performed on the edge part of the card edge connector 1, and this part is cut upward and downward on the sloped surface 5a that gradually slopes inward as it advances toward the insertion side end surface 5b. to form a wedge shape (
Same figure A2. (See B2 in the same figure).

Next, in the second step, the copper-clad laminate 4 is subjected to activation treatment (see A3 in the same figure and 83 in the same figure).

In the third step, electroless copper plating is applied to this top layer, so that the entire copper-clad laminate 4 is covered with the copper layer 11 (A in the same figure).
4. (See Figure 84).

In the fourth step, a plating resist 12 is applied to a portion flush with the wiring surface 2a (see A5 in the same figure and B5 in the same figure).

In the fifth step, the resist seal 13 is pasted only on the inclined surface 5a of the portion that does not come into contact with the mating connector contact (see A6 in the same figure and 86 in the same figure).

In the sixth step, electrolytic copper plating is applied, and the parts other than the part to which the seal 13 is attached are covered with the copper layer 14 (see A7 in the same figure and B7 in the same figure).

In the seventh step, the portion that will become the electrode terminal 6 and the wiring formed on the wiring surface 2a are solder plated in a pattern that combines them, and the top of f171114 is further covered with a solder layer 15 (A8 in the same figure. See 88>.

In the eighth step, the plating resist 12 and seal 13 applied in the fourth and fifth steps are removed (see A9 in the same figure).

In the ninth step, an etching process is performed, and the other copper layers 11 and 14 except the solder-plated part are corroded, and the insulator 4a is exposed on the sloped surface 5a in the part not in contact with the mating connector contact. (AI in the same figure)
(see O).

Next, the process proceeds to the 12th process through fusing in the 10th process and terminal taping in the 11th process, in which the solder layer 15 is peeled off (A11 in the same figure).
(See B9 in the same figure).

Next, in the thirteenth step, nickel and gold are plated on the copper layer 14 of the terminal part from which the solder layer 15 has been peeled off, to form a nickel and gold layer 16 (A12 in the same figure, BIO in the same figure).
reference).

In the 14th step, the tip of the card edge connector 1 is cut to separate the electrical connection between the upper and lower surfaces of the terminal part (A1 in the same figure).
3. (See Bll in the same figure).

In the final 15th step, solder resist printing is performed to complete the product.

In the card edge connector 1 thus formed, the copper/[11, 14 or gold layer 16, which will become the electrode terminal 6, is plated after the edge portion 5 is formed. , the card edge connector 1 is connected to the electrode terminal 6 connected to the wiring pattern on the wiring surface 2a.
The entire terminal section of the terminal is continuously covered. Thereby, the contact surface with the mating connector contact 3 becomes smooth, and sliding frictional force can be reduced.

Next, FIGS. 6 to 7B show another embodiment of the method for manufacturing a card edge connector. FIG. 6 shows the manufacturing process, and FIG. 7A shows the part that comes into contact with the mating connector contact, that is, the part shown in FIG.
The terminal part corresponding to the ■ line is shown in correspondence with the manufacturing process in Figure 6, and Figure 7B shows the part that does not come into contact with the mating connector contact, that is, the part corresponding to the ■ - ■ line in Figure 1. The parts are shown in correspondence with the manufacturing process shown in FIG. Further, in FIGS. 6, 7A, and 7B, the same reference numerals as in FIGS. 1 to 3 indicate the same parts as in FIGS. 1 to 3.

Further, this manufacturing method uses the "additive method" which is often used when forming printed wiring boards, and this manufacturing process will be explained next.

First, similarly to the embodiment shown in FIGS. 4, 5A, and 5B, copper foil 4 is placed on the upper and lower surfaces of the material for forming the wiring board 2 on which the card edge connector 1 is provided, that is, the insulator 4a.
A copper-clad laminate 4 is prepared by stretching the copper clad laminate 4 (see FIG. 7A, C1, and FIG. 78, D1).

In the first step, cutting is performed on the edge part of the card edge connector 1, and the inclined surface 5a, which is continuously inclined inward as it advances toward the insertion side end surface 5b side, is cut vertically. It is formed into a wedge shape (see C2 and D2 in the same figure).

Next, in the second step, electroless plating is applied from above the copper-clad laminate 4, and the entire copper-clad laminate 4 is covered with a copper layer 25 (
(See C3 and D3 in the same figure).

In the third step, electrolytic copper plating is performed to further cover the copper layer 25 with a copper layer 26 (C4 in the same figure, D4 in the same figure).

In the fourth step, a resist is applied from above the copper layer 25 in a pattern that includes the portion that will become the electrode terminal 6 and the wiring formed on the wiring surface 2a.

In the fifth step, a resist sticker 27 is pasted on the insertion side end surface 5b of the part that does not come into contact with the mating connector contact and the terminal part that comes into contact with the mating connector contact (see C5 in the same figure). (See D5 in the same figure).

Next, in the sixth step, the copper layer 25 is etched in the areas where the resist and seal 27 are not applied.
, 26 to expose the insulator 4a (
(See Figure 06).

In the seventh step, the resist and seal 27 are removed (see D6 in the same figure), and in the eighth step, the terminal portions are taped.

In the ninth step, nickel and gold are plated on the copper layer 26 to form a nickel and gold layer 28 (see C7 in the same figure).
(See D7 in the same figure).

In the 10th step, the tip of the card edge connector 1 is cut off, and the electrical connection between the upper and lower surfaces of the terminal section is separated (C8 in the same figure).
, see D8 in the same figure).

Solder resist printing is performed in the 11th step, and finally the 12th step
The product is completed by flux coating during the process.

Therefore, in this manufacturing method as well, the copper layer 2526 or the gold layer 28 which will become the TI terminal 6 is plated and formed after the edge portion 5 is formed.
The entire terminal portion of the card edge connector 1 is continuously covered with the electrode terminals 6 connected to the wiring pattern on the wiring surface 2a. Thereby, the contact surface with the mating connector contact 3 becomes smooth, and sliding frictional force can be reduced.

In addition, in the manufacturing method in each of the above embodiments, the electrode terminal 6
Nickel and gold plated layer 16.28
Although we have explained the case where the electrode terminal 6 is provided with a copper layer (
11, 14, 25, 26) may be formed alone.

<Effects of the Invention> As explained above, according to the present invention, the electrode terminals are printed on the cut inclined surface from the wiring surface of the printed wiring board to the insertion side end surface, so that there is no connection with the mating connector contacts. The entire portion of the card edge connector that comes into contact with the card edge connector when inserted between the connectors is covered with electrode terminals. Thereby, the contact portion on the cut inclined surface is smoothed by the electrode terminal, and the sliding frictional force with the connector contact can be reduced. As a result, damage caused by insertion and removal associated with the connection and removal of the connector portion is reduced, and the service life can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic external perspective view of a printed wiring board having a card edge connector according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. 1 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 4 is a manufacturing process diagram showing an example of the method for manufacturing the above connector, and FIG. 5A corresponds to the ll-Tl line in FIG. 1. Figure 5B is a state diagram chronologically showing the terminal part corresponding to the manufacturing process shown in Figure 4. Fig. 6 is a manufacturing process diagram showing another embodiment of the method for manufacturing the same connector as above; Fig. 7A shows the terminal portion corresponding to the line ■-■ in Fig. 1; 6th
Figure 7B is a state diagram shown in chronological order corresponding to the manufacturing process in Figure 1.
Figure 8 is a schematic configuration diagram showing an example of a conventional electrical connection structure; Figure 9 is a schematic perspective view of a conventional card edge connector; FIG. 10 is an enlarged sectional view taken along the line xx in FIG. 9. 1...Card edge connector. 2...Printed wiring board, 2a...Wiring surface. 3... Connector contact, 4... Copper clad laminate. 5... Edge portion, 5a... Inclined surface. 5b... Insertion side end surface, 6... Electrode terminal. Patent...Applicant

Claims (2)

[Claims] (1) It is integrally formed at one end of a printed wiring board that has electrode terminals printed and wired corresponding to the connector contacts on the mating side, and the tip on the insertion side is cut to form a wedge shape. In a card edge connector that is inserted and fitted between connector contacts, the electrode terminal is provided continuously from the wiring surface of the printed wiring board to almost the insertion side end surface along the sloped surface of the cut insertion side tip. A card edge connector for a printed wiring board, which is characterized by: (2) A method for manufacturing a card edge connector that is integrally provided at one end of a printed wiring board formed of a copper-clad laminate and inserted and fitted between the connector contacts of the mating side, the method comprising: a step of cutting the edge of the copper-clad laminate into a wedge shape having an inclined surface that slopes inward in the direction of insertion and fitting; a step of plating the entire copper-clad laminate with copper; and a step of plating the copper-clad laminate with copper. a step of continuously providing a resist material from the wiring surface of the copper-clad laminate through the inclined surface to approximately the insertion side end surface; and etching the copper-clad laminate provided with the resist material. A method for manufacturing a card edge connector for a printed wiring board, comprising the step of forming an electrode pattern drawn with the resist material.