JPS62281282A - Construction of connector for shielded flat cable - 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 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a connector structure for a shielded flat cable for electrical signal transmission.

(Prior Art) Recently, as shown in FIG. 4, a plurality of transmission lines 1 are arranged in parallel at regular intervals in the width direction, and these are wrapped with an insulating layer 2 as cables for electrical signal transmission. A shielded flat cable 4, which has electrical shielding layers 3 bonded to both upper and lower surfaces thereof, has been developed and is now in use.

(Inventiveness <A problem to be resolved) By the way, the above-mentioned shielded flat cable 4 was usually used as it was made of wood and was never connected and used, so no dedicated connector was developed. Ta. However, recently it has come to be used as a probe needle to measure the electrical characteristics of ICs, LSIs, etc. on a wafer by making the tips of the plurality of transmission lines 1 of the shielded flat cable 4 into contact parts. Ta. In that case, if the function as a probe needle deteriorates or becomes unusable, it is necessary to replace it with a new one, and therefore a part of the connector to which the shielded flat cable 4 is connected is required. The connector structure of the shielded flat cable is such that the shielded flat cable as the probe needle does not change its characteristic impedance so that accurate electrical characteristic measurements can be made even in the high frequency range, and that it has high crosstalk or noise. It is required not to be.

Therefore, the present invention aims to provide a shielded flat cable connector structure that can satisfy the above requirements.

(Means for Solving the Problems) In order to solve the above problems, the connector structure of the shielded flat cable according to the present invention has an electrical shield layer on at least one side and a plurality of transmission lines in an internal insulating layer. In a pair of shielded flat cables that are parallel to each other and to be connected, one of the upper and lower electrical shield layers and the insulating layer or A certain length of the insulating layer is removed, and a positioning reference hole is provided near the connection end of each flat cable to align each transmission line, and the cable is divided into upper and lower halves with bins provided corresponding to the positioning reference holes. The connecting end is held between the upper and lower surfaces of the holding body, and the bottle is fitted into the positioning reference hole, and the damper is interposed between the upper holding body and the upper surface of the connecting end of the flat cable, and the pair of flat cables is connected to each other. It is characterized by an integrated cable connection.

(Example) An example of a connector structure according to the present invention will be described with reference to FIGS. 1 and 2. Fig. 1 is a perspective view showing the connector structure before connection, and Fig. 2 is a vertical side view showing the connector structure in the connected state. 4.4' is a shielded flat cable; ' is thickness 3
Transmission line 1 made of Cu with a width of 5μ and a width of 120μ is 500μ.
They are arranged in two parallel rows with an interval of 30 cranes in width.
It is wrapped with an insulating layer 2 consisting of polyimide (100μ thick), and Cu with a thickness of 35μ and a width of 30mm is placed on both the upper and lower surfaces of the insulation N2.
The electrical shield layer 3 made of the following is bonded together. The connecting end 5.5' of the shielded flat cable 4.4' having such a structure has an upper and lower electrical shielding layer 3 and an insulating layer 2 each having a length of ml so that the transmission line 1 is exposed.
Each flat cable 4.4' is removed to form a stepped portion 6.6', and in the vicinity of the connection end 5.5' of each flat cable 4.4' is a diameter 2 which matches the transmission lines 1 to be connected.
Four positioning reference holes 7 (II) are drilled in each of the front, rear, left and right directions. The width 301 is divided into upper and lower halves, with four bins 8 on each side corresponding to the positioning reference holes 7.
, length 691. Holding body made of brass with a thickness of 5 IIm9.
At 9', the connecting ends 5 of a pair of flat cables 4.4' with their connecting ends 5.5' abutted and the stepped portions 6.6' engaged.
．． 5' is sandwiched from both the upper and lower surfaces, and the bin 8 is fitted into the positioning reference hole 7, and the damper 10 made of urethane rubber with a width of 30 mm, a length of 10 mm, and a thickness of 51 mm is flat with the upper holder 9. A pair of flat cables 4.4' are interposed between the upper surface of the connecting end 5' of the cable 4' and are integrally connected.

Next, another embodiment of the connector structure according to the present invention will be described with reference to FIG. This example uses flat cable 4
The only difference from the previous embodiment is that the lines 1-11 are provided in parallel on both sides of the exposed transmission line 1 at the stepped portion 6 of the connection end 5, and the other configurations are exactly the same. .

According to the connector structure configured as described above, each transmission line 1 at the stepped portion 6.6' of the connecting end 5.5' of the connected pair of shielded flat cables 4.4' is connected to the respective connecting end. The positioning reference hole 7 drilled in the vicinity of the portion 5.5' and the pin 8 provided in the upper and lower holders 9.9' align each other in the width direction and form a straight line in the longitudinal direction. Since the upper and lower surfaces of each transmission line 1 are in close contact with each other due to the engagement of the stepped portions 6 and 6', the characteristic impedance does not change at the connection portion and remains constant. In particular, as shown in FIG.
1, each transmission line 1 can move independently, so that each transmission line 1 is completely aligned in the width direction and connected with the upper and lower surfaces in close contact with each other. Further, since the transmission lines 1 are completely shielded by the engagement of the step portions 6, 6' at the connection portion, crosstalk is reduced and noise is significantly reduced.

In addition, in each of the above embodiments, the flat cable 4.4'
has an electrical shield layer 3 on both the upper and lower surfaces, but it may be provided only on one of the upper and lower surfaces. In that case, at the connecting end of one flat cable, only the insulating layer 2 without the electrical shield layer 3 is removed to form a stepped portion. Further, although the transmission lines 1 in the flat cable 4.4' are arranged in two rows, the present invention is not limited to this, and any number of rows greater than or equal to two may be used. Further, the upper and lower holders 9,9' are made of brass, but may also be made of plastic.

(Effects of the Invention) As can be seen from the above description, according to the connector structure of the present invention, the transmission lines in the stepped portions of the connecting ends of a pair of connected shielded flat cables are aligned in the width direction. Since the transmission lines are aligned in a straight line in the longitudinal direction and the upper and lower surfaces of each transmission line are in close contact with each other due to engagement of the stepped portions, the characteristic impedance is constant at the connection portion. Further, since the transmission lines are completely shielded by the engagement of the stepped portions at the connection portion, crosstalk is reduced and noise is significantly reduced. Therefore, even in the high frequency range, RC, LSI on the wafer
In transmitting electrical signals by measuring electrical characteristics such as the above, there is an excellent effect that the electrical signals can be transmitted reliably and accurately.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the shielded flat cable connector structure according to the present invention. FIG. 1 is a perspective view before connection, FIG. 2 is a longitudinal sectional view of the connected state, and FIG. Figure 3 is a perspective view of the connector structure of another embodiment before connection;
FIG. 4 is a longitudinal sectional perspective view of the shielded flat cable. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. 5.5...Procedure ■Gun 10...γ>
Figure 2 Figure 4

Claims (1)

[Claims] 1) In a pair of shielded flat cables to be connected, each of which has an electrical shielding layer on at least one side and a plurality of transmission lines in parallel in the width direction in an internal insulating layer. A certain length of the electrical shielding layer and insulation layer on either the upper or lower side is removed so that multiple transmission lines are exposed at the connection end of each flat cable, and each transmission line is removed near the connection end of each flat cable. A positioning reference hole is provided to match the positioning holes, and a pair of flat cables whose connecting ends are abutted by a holder divided into upper and lower halves and provided with pins corresponding to the positioning reference holes are connected to both the upper and lower sides. The pin is inserted into the positioning reference hole, and the damper is interposed between the upper holder and the top surface of the connection end of the flat cable, so that the pair of flat cables are connected and integrated. Features a shielded flat cable connector structure. 2) The shielded flat cable according to claim 1, wherein slits are provided on both sides of the transmission line at the connection end of at least one of the pair of shielded flat cables. connector structure.