WO2019188549A1

WO2019188549A1 - Connection jig

Info

Publication number: WO2019188549A1
Application number: PCT/JP2019/011344
Authority: WO
Inventors: 清文久保
Original assignee: 日本電産リード株式会社
Priority date: 2018-03-30
Filing date: 2019-03-19
Publication date: 2019-10-03
Also published as: JPWO2019188549A1; JP7248018B2

Abstract

This connection jig (1) is for conductively connecting a standard to a second external device, the standard comprising a connection unit which can connect to a first external device over a coaxial connection cable, and at least an electrostatic capacitance that acts as a standard of an electrical property. The connection jig is provided with a substrate (9) covered on the surface by a planar pattern (90), and on said substrate, a coaxial connector (8) which can be detachably attached to the connector unit and a mounting pad (15) on which a capacitor (14) is mounted are provided. The mounting pad and the planar pattern are connected by only a connection pattern (16b) having a width dimension w2 smaller than the width direction W2 of the mounting pad.

Description

Connecting jig

The present invention relates to a connection jig used to electrically connect a standard device having at least a capacitance that is a standard of electrical characteristics to an external device.

2. Description of the Related Art Conventionally, in a substrate inspection apparatus provided with a measurement circuit for measuring resistance, a device having a standard device (reference resistor) having a known resistance used for calibration of the measurement circuit is known (for example, (See Patent Document 1). In Patent Document 1, the measurement unit (measurement circuit) can measure the electrical resistance value by a four-terminal method, a pin terminal is connected to one end of the standard device, and a pin terminal is connected to the other end of the standard device. And connecting a standard device to the measurement circuit via the pin terminal, measuring the electrical resistance value, and calculating the difference between this measured value and the known electrical resistance value, It is described that calibration is performed.

JP-A-2015-55516

By the way, if the above-mentioned standard device does not have a predetermined electrical characteristic corresponding to the inspection object, it is not possible to properly inspect the substrate by the inspection device (first external device). For this reason, it is necessary to accurately measure the electrical characteristics in advance in a state where a standard device is connected to a measuring device (second external device) having a measuring unit, a display unit, and the like.

Such a standard device and a device to be connected including an inspection device and a measurement device are connected using, for example, a coaxial connection cable. However, it is troublesome to perform the connection work by manually attaching and detaching the coaxial connection cables one by one to the standard device and the device to be connected.

An object of the present invention is to provide a connection jig that can easily connect a standard device to a device to be connected.

A connection jig according to an example of the present invention includes a standard device having a connection portion connected to a first external device via a coaxial connection cable, and at least a capacitance that is a standard of electrical characteristics. A connection jig for conductively connecting to an external device, comprising a substrate whose surface is covered with a planar pattern, on which a coaxial connector detachable from the connection portion and a capacitor are mounted The mounting pad and the planar pattern are connected only by a connection pattern having a width dimension smaller than the width dimension of the mounting pad.

It is a front view which shows the structure of the connection jig which concerns on this invention. It is a bottom view which shows the structure of the principal part of the connection jig shown in FIG. It is a conceptual diagram which shows notionally the structure of the standard device connected to the connection jig shown in FIG. FIG. 4 is a sectional view of the standard device shown in FIG. 3 taken along the line IV-IV. FIG. 4 is an equivalent circuit diagram equivalently showing an electric circuit of the standard device shown in FIG. 3. It is a top view which shows the modification of the connection jig which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

1 is a front view showing the configuration of the connection jig 1 according to the present invention, FIG. 2 is a bottom view showing the configuration of the main part of the connection jig 1 shown in FIG. 1, and FIG. 3 is the connection shown in FIG. FIG. 4 is a conceptual diagram schematically showing the configuration of the standard device 10 connected to the jig 1, FIG. 4 is a sectional view taken along the line IV-IV of the standard device 10 shown in FIG. 3, and FIG. FIG. 3 is an equivalent circuit diagram equivalently showing the electrical circuit of FIG.

As shown in FIGS. 3 and 4, the standard device 10 includes a coaxial cable 20 having a core wire 11 and an outer conductor 12, a resistor 2 having one end 2 a connected in series to the core wire 11, and the core wire 11. A base plate 3 having an opening 31 and a housing case 4 for housing the coaxial cable 20, the resistor 2 and the base plate 3 are provided.

The housing case 4 includes a bottom plate 41 having a predetermined width extending in the installation direction of the coaxial cable 20, a pair of side plates 42 erected on the side portions thereof, and a pair of end plates 43 erected on both ends of the bottom plate 41. And a lid body (not shown) that covers the upper surface portion of the case main body.

A first BNC connector 45 to which the outer conductor 12 of the coaxial cable 20 is connected is provided at one end of the bottom plate 41 located on the right side of FIG. 3 is provided with a second BNC connector 46 to which the other end 2b of the resistor 2 is connected via a connection line 13 to be described later. The BNC connector means a bayonet lock connection type coaxial connector.

The base plate 3 is made of a plate-like body made of an electrically insulating material having a width dimension that can slide along the bottom plate 41 of the housing case 4, and is disposed in a state of being erected between the side plates 42 of the housing case 4. ing. The opening 31 formed in the base plate 3 has an opening diameter larger than the outer diameter of the core wire 11 by a predetermined value or more. Thereby, the core wire 11 inserted through the opening 31 is configured to be displaceable in a direction orthogonal to the axial direction of the core wire 11 in the opening 31 as shown by an arrow A in FIG.

A base end portion of a conductor tube 5 made of a conductor such as a brass pipe is attached to the first surface 3a of the base plate 3, that is, the wall surface located on the right side in FIG. The conductor tube 5 is formed of a cylindrical body having an open end, and a flange portion (not shown) provided at the base end portion of the conductor tube 5 is bolted to the first surface 3 a of the base plate 3. Is installed so as to surround the coaxial cable 20.

The coaxial cable 20 includes a semi-rigid cable including a core wire 11 made of a copper wire, an outer conductor 12 made of a small-diameter copper pipe, and an insulator made of a fluororesin disposed between the two. Yes. This semi-rigid cable is made of, for example, a trade name “SUCOFLEX100 series” manufactured by Hayashi Eiki Co., Ltd., and has a foldable flexibility and a rigidity for maintaining the folded shape.

The core wire 11 of the coaxial cable 20 is installed so as to extend from the one end 2 a of the resistor 2 toward the one end portion side of the bottom plate 41, that is, the end portion side located on the first surface 3 a side of the base plate 3. Has been. And the front-end | tip of the core wire 11 penetrates the opening part 31 of the base board 3, and is inserted in the below-mentioned external conductor 12 located in the 1st surface 3a side of the base board 3. FIG.

The resistor 2 is composed of a lead wire type resistor in which lead wires are led out from both ends of the resistor body, and one end 2a of the resistor 2 is connected to the base end of the core wire 11 on the second surface 3b side of the base plate 3. They are connected in series. The resistor 2 constitutes a reference resistor having a predetermined electric resistance value R. In addition, the other end 2 b of the resistor 2 is connected to a second BNC connector 46 provided on the other end side of the housing case 4 via the connection line 13.

The outer conductor 12 of the coaxial cable 20 has a rising portion 12a rising from a first BNC connector 45 provided on one end side of the bottom plate 41 of the housing case 4 and an upper end portion thereof toward the other end portion side of the housing case 4. And an extending portion 12b extending.

The extending portion 12 b of the outer conductor 12 is introduced into the conductor tube 5 from the distal end side of the conductor tube 5 and is externally fitted to the core wire 11 located on the first surface 3 a side of the base plate 3. Is installed. The core wire 11 and the outer conductor 12 constitute a first capacitor having a certain reference capacitance C1.

Further, on the second surface 3b of the base plate 3, that is, the wall surface located on the left side in FIG. The electrode 32 is connected to the circuit ground via a connection line 33.

The second capacitor capable of adjusting the capacitance C2 is formed by the core wire 11 installed so as to be inserted through the opening 31 of the base plate 3 and the annular electrode 32. That is, since the electrostatic capacitance of the capacitor is inversely proportional to the facing distance, the electrostatic force generated between the core wire 11 and the electrode 32 by the operator displacing the core wire 11 in a direction orthogonal to the axial direction. The capacity C2 is configured to be adjustable.

Furthermore, the conductor tube 5 is conductively connected to the other end 2 b of the resistor 2 through a connection line 51. The conductor tube 5 and the extended portion 12b of the outer conductor 12 inserted into the conductor tube 5 form a third capacitor capable of adjusting the capacitance C3. The conductor tube 5 and the core wire 11 form a fourth capacitor capable of adjusting the capacitance C4.

That is, since the capacitance of the capacitor is proportional to the facing area, the operator slides and displaces the base plate 3 along the inner wall surface of the housing case 4, and the conductor tube as shown by the arrow B in FIG. 5 is displaced in the axial direction of the coaxial cable 20, so that the electrostatic capacitance C 3 generated between the extending portion 12 b of the outer conductor 12 and the conductor tube 5 and the static electricity generated between the core wire 11 and the conductor tube 5 are obtained. The electric capacity C4 is configured to be adjustable.

For example, when calibrating an inspection apparatus such as a board inspection apparatus installed in a user's factory, the connection part of the standard device 10, that is, the first BNC connector 45 and the second BNC connector 46, as shown in FIG. The

coaxial connectors

63a and 64a provided at one end portions of the

coaxial connection cables

63 and 64 are respectively connected. The

coaxial connectors

63b and 64b provided at the other ends of the

coaxial connection cables

63 and 64 are connected to a first external device (hereinafter referred to as an inspection device) composed of an inspection device (not shown), and the standard 10 Thus, the inspection apparatus using the standard device 10 is calibrated.

As shown in FIG. 1, the connection jig 1 according to the present invention is a board on which a connection portion (first BNC connector 45 and second BNC connector 46) of a standard device 10 and a detachable coaxial connector 8 are provided on the upper surface. 9.

As shown in FIG. 2, a planar pattern 90 covering the surface (bottom surface) of the substrate 9 and a first terminal 91 connected to the core wire of the coaxial connector 8 are provided on the bottom surface of the substrate 9. A plurality (four in the illustrated example) of second terminals 92 connected to the outer conductor of the coaxial connector 8 are provided around the first terminal 91. A connector 93 that can be connected to a second external device (hereinafter referred to as a measuring device) composed of a measuring device to be described later is provided. The first terminal 91 and the second terminal 92 are connected to the connector 93 via a wiring pattern provided on the substrate 9. Thus, the first terminal 91 and the second terminal 92 are configured to be connected to the measuring device via the connector 93, respectively.

Further, three sets of mounting pads 15 on which the capacitors 14 are mounted are provided between the adjacent

second terminals

92 and 92. The mounting pad 15 has a first pad 15a to which one of the electrodes provided on the capacitor 14 is soldered, and a second pad 15b to which the other electrode of the capacitor 14 is soldered. 2 shows a state in which the capacitor 14 is removed from the substrate 9, and the capacitor 14 is indicated by a virtual line.

The first pad 15a is connected to the first terminal 91 only by a connection pattern 16a having a width dimension w1 narrower than the width dimension W1. On the other hand, the second pad 15b is connected to the planar pattern 90 only by the connection pattern 16b having a width dimension w2 smaller than the width dimension W2.

The capacitor 14 has substantially the same capacitance as the capacitance of the above-described

coaxial connection cables

63 and 64 used when the standard device 10 and the inspection device are conductively connected. The electrodes of the capacitor 14 are attached to the bottom surface of the substrate 9 by being soldered to mounting pads 15 provided on the substrate 9.

Next, adjustment for setting the electrical characteristics of the standard device 10 to an appropriate value in a state where the standard device 10 is electrically connected to the measuring device including an AC power source and an ammeter (not shown) by the connection jig 1 described above. The method is described below.

First, the connecting part of the standard device 10 composed of the first and

second BNC connectors

45 and 46 is connected to the coaxial connector 8 provided on the upper surface of the substrate 9 as shown in FIG. As a result, the standard device 10 and the measuring device (not shown) are electrically connected by the connecting jig 1 having the substrate 9. Next, an alternating current signal having a constant voltage is supplied to the standard device 10 from an unillustrated alternating current power source provided in the measuring apparatus, and the current value is detected by an unillustrated ammeter.

Based on the voltage of the AC signal and the detected value of the ammeter, the electrical resistance value R of the RC series circuit equivalent to the standard device 10 and the capacitance C are measured by a measurement unit (not shown), and the measurement is performed. The value is displayed on a display unit (not shown). The above-described measuring unit is composed of, for example, an impedance measuring instrument that measures electrical characteristics such as resistance of a conductor pattern provided on a substrate and capacitance between conductor patterns.

For example, the operator confirms the capacitance C displayed on the display unit, and displaces the core wire 11 in a direction orthogonal to the axial direction so that the capacitance C becomes a desired value. The capacitance C2 is changed, or the base plate 3 is slid along the inner wall surface of the housing case 4 to change the capacitances C3 and C4. In this way, the electrical characteristics of the standard device 10 can be adjusted to a desired value.

When the electrical characteristics of the standard device 10 reach a desired value, the operator fixes the base plate 3 so that the capacitance C of the standard device 10 does not change by bonding or screwing the base plate 3 to the housing case 4. To do.

According to the connecting jig 1 having the above-described configuration, the standard device 10 having at least a capacitance serving as a standard for electrical characteristics accurately measures whether or not the standard instrument 10 has appropriate electrical characteristics, and is adjusted in advance. Can be easily performed.

That is, in the connection jig 1 used when the standard device 10 connected to the first external device via the

coaxial connection cables

63 and 64 is conductively connected to the measuring device, the first BNC connector 45 and the second BNC connector 45 are used. A connecting portion composed of a BNC connector 46 and a detachable coaxial connector 8 are provided on the substrate 9 of the connecting jig 1. Further, the capacitor 14 for adjusting the difference between the capacitance of the

coaxial connection cables

63 and 64 and the capacitance of the connection jig 1 is provided on the substrate 9 of the connection jig 1. By reducing the difference between the capacitance of the

coaxial connection cables

63 and 64 and the capacitance of the connection jig 1 including the capacitor 14, the capacitance of the

coaxial connection cables

63 and 64 and the connection jig 1 are reduced. It is possible to suppress the occurrence of a measurement error due to the difference between the capacitances of the two. Therefore, there is an advantage that an accurate measurement result taking into account the capacitance of the

coaxial connection cables

63 and 64 can be obtained.

In addition, it is also possible to measure the electrical characteristics of the standard device 10 in a state where the standard device 10 is conductively connected to the measuring device by the

coaxial connection cables

63 and 64. However, in this case, an operator needs a complicated work of manually connecting the standard device 10 and the measuring device one by one using the

coaxial connection cables

63 and 64. In addition, by repeating this connection operation, the

coaxial connection cables

63 and 64 may be disconnected and a connection failure may occur.

In contrast to this, the substrate 9 of the connecting jig 1 and the standard device 10 are connected via the coaxial connector 8 as described above, and the standard device 10 and the measuring device are electrically connected via the substrate 9. In such a case, there is no risk of connection failure due to disconnection, and there is an advantage that the work of measuring the electrical characteristics of the standard device 10 can be facilitated.

Furthermore, as described above, the second pad 15b of the mounting pad 15 on which the capacitor 14 is mounted and the planar pattern 90 covering the surface of the substrate 9 are narrower than the width dimension W2 of the second pad 15b. Since the connection is made only by the connection pattern 16b having w2, when the capacitor 14 is soldered to the mounting pad 15, the heat of the soldering iron is effectively suppressed from moving to the planar pattern 90 side. Can do. As a result, it is possible to suppress a large heat load from being applied to the capacitor 14 from the soldering iron, and it is possible to effectively suppress deterioration of the capacitor characteristics caused by excessive heating of the capacitor.

In addition, as described above, the first connector 91 is connected to the core wire of the coaxial connector 8 and connected to the second external device, and the second conductor is connected to the outer conductor of the coaxial connector 8. When a plurality of second terminals 92 connected to the external device are provided on the substrate 9 and the mounting pad 15 is disposed between the plurality of second terminals 92, the first There is an advantage that the terminals 91 and the second terminals 92 and the mounting pads 15 can be compactly integrated and efficiently arranged on the substrate 9.

Furthermore, as shown in the above-described embodiment, when a plurality of mounting pads 15 are arranged around the first terminal 91, a plurality of capacitors 14 having various electrostatic capacities are combined. Thus, the capacitance of the connection jig 1 adjusted by the above and the capacitance of the

coaxial connection cables

63 and 64 can be made to correspond accurately. As a result, there is an advantage that it is possible to more accurately measure whether or not the standard device 10 having at least a capacitance serving as a standard of electrical characteristics has an appropriate capacitance.

FIG. 6 is a plan view showing a modification of the connecting jig 1 according to the present invention. The substrate 9 of the connection jig 1 is provided with a plurality of pairs of coaxial connectors 8 that can be attached and detached with a standard device 10. According to this configuration, a plurality of standard devices 10 are arranged on the substrate 9 and each standard device 10 has an appropriate capacitance in a state where each standard device 10 is electrically connected to the measuring device. It can be continuously measured. Therefore, there is an advantage that the measurement operation of the standard device 10 can be performed more easily and quickly.

The standard device 10 whose electrical characteristics have been adjusted in advance as described above includes, for example, a touch panel substrate, a printed wiring substrate, a flexible substrate, a ceramic multilayer wiring substrate, an electrode plate for a liquid crystal display or a plasma display, and a semiconductor package. It is used to calibrate a first external device composed of an inspection device for inspecting a substrate composed of a package substrate, a film carrier, or the like.

Then, according to the standard device 10 having the above-described configuration, trial and error such as combining reference resistors having various electric resistance values and reference capacitors having various electrostatic capacities and combining them in various ways. It is possible to easily obtain the standard device 10 having an appropriate electric resistance value R and capacitance C without performing it.

That is, the connection jig according to an example of the present invention includes a standard device having a connection portion connected to the first external device via a coaxial connection cable, and at least a capacitance that is a standard of electrical characteristics. A connection jig for conductively connecting to a second external device, comprising a substrate whose surface is covered with a planar pattern, on which a coaxial connector detachable from the connection portion and a capacitor are mounted. The mounting pad and the planar pattern are connected only by a connection pattern having a width dimension smaller than the width dimension of the mounting pad.

According to this configuration, it is possible to easily perform the work of measuring the electrical characteristics of the standard device in advance without causing problems such as a connection failure caused by the disconnection of the coaxial connection cable. Furthermore, when soldering the capacitor to the mounting pad, the soldering iron can be prevented from moving to the planar pattern side by the narrow connection pattern. There is an advantage that the capacitor can be easily soldered to the mounting pad of the substrate while suppressing the load. Therefore, it is possible to effectively suppress deterioration of the capacitor characteristics caused by excessive heating of the capacitor.

The substrate is connected to the core wire of the coaxial connector, connected to the single first terminal connected to the second external device, and to the external conductor of the coaxial connector. Preferably, a plurality of second terminals connected to the second external device are provided, and the mounting pad is disposed between the plurality of second terminals.

This configuration has the advantage that the first terminal, the second terminal, and the mounting pad can be compactly arranged and efficiently arranged on the substrate.

Further, it is preferable that a plurality of the mounting pads are arranged around the first terminal.

According to this configuration, the capacitance of the connection jig adjusted by combining a plurality of capacitors having various capacitances and the capacitance of the coaxial connection cable can be accurately matched. As a result, there is an advantage that it is possible to more accurately measure whether or not a standard device having at least a capacitance serving as a standard for electrical characteristics has an appropriate capacitance.

Further, it is preferable that the substrate is provided with a plurality of the coaxial connectors.

According to this configuration, whether or not each standard device has an appropriate capacitance in a state where a plurality of standard devices are arranged on the substrate and each standard device is electrically connected to the second external device. No can be measured continuously. Therefore, there is an advantage that the measurement work of the standard device can be performed more easily and quickly.

The connection jig having such a configuration can easily and properly connect the standard device to the device to be connected.

This application is based on Japanese Patent Application No. 2018-069997 filed on Mar. 30, 2018, the contents of which are included in this application. It should be noted that the specific embodiments or examples made in the section for carrying out the invention are merely to clarify the technical contents of the present invention, and the present invention is not limited to such specific examples. It should not be interpreted in a narrow sense only as a limitation.

DESCRIPTION OF SYMBOLS 1 Connection jig 2 Resistor 3 Base board 4 Accommodating case 5 Conductor tube 8 Coaxial connector 9 Substrate 10 Standard 11 Core wire 12 External conductor 12a Rising part of external conductor 12b Extension part of external conductor 13 Connection line 14 Capacitor 15 For mounting

Pad

16a, 16b Connection pad 20 Coaxial cable 31 Opening portion 32 Electrode 33 Connection line 41 Bottom plate 42 Side plate 43 End plate 45 First BNC connector (connection portion)
46 Second BNC connector (connection part)
51

Wiring cable

63, 64 Coaxial connection cable 90 Planar pattern 91 First terminal 92 Second terminal

Claims

A connection jig for conducting and connecting a standard device having a connection portion connectable to the first external device via a coaxial connection cable and at least an electrostatic capacity serving as a standard of electrical characteristics to the second external device. Because
A substrate whose surface is covered with a planar pattern,
The board is provided with a coaxial connector that can be attached and detached, and a mounting pad on which a capacitor is mounted,
The connection jig in which the mounting pad and the planar pattern are connected only by a connection pattern having a width that is narrower than the width of the mounting pad.
The substrate is connected to the core wire of the coaxial connector, and is connected to a single first terminal connected to the second external device, and to an external conductor of the coaxial connector, and the second connector A plurality of second terminals connected to an external device;
The connection jig according to claim 1, wherein the mounting pad is disposed between the plurality of second terminals.
The connection jig according to claim 2, wherein a plurality of the mounting pads are arranged around the first terminal.
The connection jig according to any one of claims 1 to 3, wherein the coaxial connector is provided at a plurality of locations on the substrate.