JPH0627138A - Connecting-terminal component and jig for measuring electric characteristic of electronic component - Google Patents

Abstract

PURPOSE:To obtain an electric-characteristic measuring jig for an electronic component, which can accurately measure the electric characteristics over the wide range from a low frequency to a high frequency. CONSTITUTION:A hole part is formed at the central part of a printed board, wherein a plurality of strip-line conductors and a grounding conductor are provided. A plurality of protruding pieces 10 are formed in a comb shape inward from the inner edge part of the hole part as a unitary body. The tip of each conductor, which is provided on the surface of each protruding piece, is made to be the contact point for connection to various kinds of terminals of an electronic component to be measured. A spring plate 32, which pushes each contact point to each terminal of the electronic component, is provided on the rear surface side of the protruding piece. The printed board and the spring plates are fixed and housed in a shielded box. An inserting hole 26b is provided in the shielded box 20. The contact point provided on the protruding piece 10 is exposed to the outside through an inserting hole 26b, and the electronic component is loaded in the inserting hole 26b so as to align the position of the electronic component. A cap body 30, which covers the inserting hole 26b so that the hole can be freely opened and closed and pushes the loaded electronic component to the side of the printed board when the hole is closed, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting terminal part and a jig for measuring electric characteristics of electronic parts, which are capable of accurately measuring electric characteristics over a wide band from low frequencies to high frequencies.

[0002]

2. Description of the Related Art As a measuring jig used for measuring the electrical characteristics of electronic parts, a conventional jig has been used.
The one proposed in Japanese Patent No. 5 is known. This measuring jig is a probe placed on the printed circuit board,
The probe consists of a stripline conductor configured to be connected to this probe on the printed circuit board and a leaf spring connected to the ground conductor surface on the back side of the printed circuit board. A leaf spring is used in contact with a terminal or a case of an electronic component to be measured, and a probe can be used to easily connect to input / output terminals of various shapes.

[0003]

However, in the probe, the probe pin is inserted into and retracted from a conductor tube and is urged toward the projecting side by a spring, so that the probe pin is moved to the measured electron. Since the probe pins are pressed into contact with the input / output terminals of the parts, the protruding length of the probe pin when connecting to the input / output terminals changes each time and is not constant. There was a problem of inconsistency.

Further, in terms of the structure of the probe, it is necessary to give a certain length to the probe pin, which causes the probe pin to act as an antenna and is easily affected by disturbance such as noise. In addition, as shown in (a) in the graph of the voltage standing wave ratio of FIG. 6, there is a problem that signal reflection occurs particularly in a high frequency band of 50 MHz or more.

The present invention has been made in view of the above background, and an object thereof is to measure electric characteristics of electronic parts capable of accurately measuring electric characteristics over a wide band from low frequencies to high frequencies. It is to provide a connection terminal part and a jig.

[0006]

In order to achieve the above object, the present invention provides a connecting terminal component for measuring electrical characteristics of an electronic component, which is provided with a plurality of strip line conductors and a grounding conductor and is provided at a predetermined position. A printed circuit board having a hole; a plurality of flexible projecting pieces integrally formed by extending from an inner peripheral edge of the hole of the printed circuit board; and a strip provided on the surface of the projecting piece. The line conductor and the ground conductor are constituted by contacts for connecting to the input / output terminal and the ground terminal of the measured electronic component, respectively.

In addition to the above structure, it is preferable to further provide an elastic member capable of contacting and pressing the back surface of each protruding piece of the printed circuit board, and further, a contact provided on the surface of the protruding piece. May be formed so as to be raised. Further, at least one of the projecting pieces may be formed to have a wide width, and two adjacent contact points may be arranged side by side.

On the other hand, the electric characteristic measuring jig according to the present invention is provided with the connecting terminal parts having the above-mentioned respective configurations and a shield box for fixing and housing the connecting terminal part in the shield box. Of a plurality of contacts provided on the surface of the projecting piece of the device are exposed to the outside, and an electronic part to be measured is loaded, and the input / output terminal and the ground terminal of the electronic part to be measured are aligned with each contact. An insertion hole for alignment and a lid body that covers the insertion hole so as to be openable and closable and that presses the measured electronic component loaded in the insertion hole toward the printed circuit board when closed.

[0009]

When the input / output terminal and the ground terminal of the electronic component to be measured are pressed against the predetermined contacts provided on the surface of each projecting piece of the printed circuit board, each projecting piece is elastically deformed and individually bent. Each contact is pressed into contact with each terminal of the electronic component. That is, each terminal of the electronic component and each contact of the printed circuit board can be reliably connected without using a conventional probe, and there is no element such as a probe pin that varies in length or functions as an antenna. Therefore, it is possible to prevent impedance mismatch and standing waves in the high frequency band as much as possible, suppress disturbance such as noise, and measure accurate electrical characteristics over a wide range from low frequency to high frequency. obtain.

If the measuring jig of the present invention is used,
The connection of the above-mentioned electronic device under test to the contact is easily performed as follows. That is, when the measured electronic component is loaded into the insertion hole of the shield box, the measured electronic component is positioned and its terminals are brought into contact with the contacts formed on the projecting piece of the printed circuit board. The electronic component is pressed against the printed circuit board side by the lid, and each protruding piece is elastically deformed and individually bent, and the elastic force causes each contact to be pressed against each terminal of the electronic component. That is, each terminal of the electronic device under test and each contact of the printed circuit board can be reliably connected by a simple operation of loading the electronic device under test into the insertion hole and closing the lid, and impedance mismatch and Not only can standing waves be prevented from occurring in the high-frequency band as much as possible, but disturbances such as noise can be further suppressed by the shield box, making it more accurate over a wide band from low frequencies to high frequencies. The electrical characteristics can be easily measured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a printed circuit board of a jig for measuring electrical characteristics of electronic parts according to the present invention. The printed circuit board 2 has a plurality of strip line conductors 4.
a, 4b, 4c, 4d and a ground conductor 6 are provided. A rectangular hole 8 is formed in the central portion of the printed circuit board 2, and the inner peripheral edge portion forming the hole 8 is comb-tooth-shaped inwardly from two opposing left and right sides shown in the figure. A plurality of flexible projecting pieces 10, ... One of the stripline conductors 4a to 4d or the ground conductor 6 is extendedly formed on each of the projecting pieces 10, ..., Each extended end of which is exposed on the surface of each of the projecting pieces 10 ,. 12, ... Are formed. Here, in this embodiment, two systems of the strip line conductor 4d and its contact 12 and the ground conductor 6 and its contact 12 are provided in parallel on one projecting piece 10a. As a result, since the plate member is also present between the two conductors 4d and 6, it is possible to widen the width of the ground conductor 6 or to form a through hole in the ground conductor on the back surface corresponding to the portion between them. As a result, the ground area is increased and the stabilization of the characteristics is improved. It also increases strength.

On the other hand, in the present example, each contact 12, ... Is formed by a terminal pin protruding about 2 mm from the surface of each projecting piece 10 ,. Conduct the measured object on the printed board with conductors 4a-
You may make it connect directly to d and 6. A ground conductor is formed on almost the entire back surface of the printed circuit board 2.

The printed circuit board 2 is housed in and fixed to a shield box 20 as shown in FIGS. Shield box 20
Is a bottom box 22 having a rectangular opening 22a on the upper surface,
An under plate 24 having an outer peripheral portion fastened and fixed to the upper surface of the bottom box 22 and provided on the opening 22a, an upper plate 26 superposed on the under plate 24 and fastened and fixed thereto, and the upper plate 26. 30 attached to the upper surface of the hinge via a hinge 28
It has been mainly since.

The outer peripheral side of the printed circuit board 2 is fastened and fixed to the upper surface of the under plate 24. Between the printed circuit board 2 and the under plate 24, the projecting pieces 10 ,. A spring plate 32 is interposed as an elastic member for auxiliary elastically supporting the back side of the plate, and the spring plate 32 is fixed to the under plate 24 together with the printed circuit board 2. Further, the under plate 24 and the spring plate 32 are formed with openings 24 a and 32 a for exposing the back surface of the printed board 2 to the opening 22 a of the bottom box 22.

The opening 32a of the spring plate 32 is located between the projecting piece groups 10A and 10B (see FIG. 1) from the left and right of the printed circuit board 2, and is centered so as to connect the two front and rear sides facing each other. A bridge 32b is formed in the portion, and a plurality of spring pieces 32c extending leftward and rightward from the bridge 32b and reaching below the projecting pieces 10 of the printed circuit board 2 are formed in a comb shape. In addition, the opening 2 of the under plate 24
4a also corresponds to the bridge 32b of the spring plate 32,
Connecting piece 24b for supporting the lower side of the bridge 32b
Is formed integrally by connecting the front and rear sides. In this example, the spring plate 32 is always separated from the projecting piece 10 and comes into contact with the projecting piece 10 when the projecting piece 10 is pressed and lowered during measurement, and is given an elastic force. That is, it also has a function as a stopper. However, they may be always in contact with each other.

On the back surface of the upper plate 26, a rectangular recess 26a having a slightly larger size is formed in order to avoid interference with the printed circuit board 2. In addition, the upper plate 26 exposes the contacts 12 formed on the respective protruding pieces 10 of the printed circuit board 2 fixed on the under plate 24 to the outside, and at the same time, the measured electronic component (in this example, HI
C) An insertion hole 26b into which 40 is loaded is provided.
The insertion hole 26b is formed in a cross shape, and the longitudinally elongated opening portion in the front-rear direction serves as a loading portion for the measured electronic component 40. When the insertion hole 26b is loaded in the above-mentioned portion, the insertion hole 26b is provided on the back surface of the measured electronic component 40. The various input / output and ground terminals 40a are positioned and connected on the contacts 12 of the printed circuit board 2, respectively. In addition, the horizontally long opening portion in the left-right direction is formed to facilitate the attachment and detachment of the measured electronic component 40.

The insertion hole 26b is covered with a lid 30 so as to be openable and closable. This lid 30
At the center of the back surface of the above, a pressing plate 34 that abuts on the upper surface of the case of the measured electronic component 40 loaded in the insertion hole 26b and presses the measured electronic component 40 toward the printed circuit board 2 side is attached. . The pressing plate 34 is made of a soft copper foil plate and has a rectangular ring-shaped frame 36 between which the lid 3 is inserted.
It is fastened and fixed to the back of 0. By changing the number of laminated copper foil plates, manufacturing errors in the height direction of the measured electronic component 40 can be absorbed, and the measured electronic component 40 can be pressed against the printed circuit board 2 with a predetermined pressure. There is. A concave portion 26c for preventing the interference of the frame 36 is formed on the surface of the upper plate 26.
It is formed around b. Further, the lid 30 is provided with a hook 38 which is engaged with the upper plate 26 and keeps the lid 30 in a closed state.

On the other hand, in the bottom box 22, four coaxial connectors 42 connected to the stripline conductors 4a to 4d of the printed circuit board 2 and provided on the back surface thereof and the bottom box 2 thereof are provided.
The four coaxial cables 46 are arranged by connecting the four coaxial connectors 44 attached to the rear surface of No. 2, and the outer side of each coaxial connector 44 on the rear surface of the bottom box 22 is measured, though not shown. The coaxial cable from the container is connected. In this example, since the output terminal has a high frequency, use a coaxial cable covered with a copper tube,
Other coaxial cables are ordinary ones.

Therefore, in the jig for measuring the electrical characteristics of the electronic component constructed as described above, when the measured electronic component 40 is loaded in the insertion hole 26b of the shield box 20, the measured electronic component 40 is positioned and Various terminals 40a for input / output, grounding, etc. are provided on the respective protruding pieces 10,
When the cover body 30 is closed from this state by being contacted with the contact points 12 respectively formed in.
Is pressed to the printed circuit board 2 side by each protruding piece 1
0, ... are elastically deformed and flexed individually, and each contact 12 is pressed against each terminal 40a of the electronic component 40 by its elastic force, and each projecting piece 10 ,. Elastically supported by.

That is, the measured electronic component 40 is inserted into the insertion hole 2
Each terminal 40a of the measured electronic component 40 and each contact 12 of the printed circuit board 2 can be reliably connected by a simple operation of loading the battery 6b and closing the lid 30. Moreover, unlike the conventional probe pins, since there is no element that varies in length or functions as an antenna, it is possible to prevent standing waves in the high frequency band due to impedance mismatch as much as possible. Disturbances such as noise can be further suppressed by the shield box 20, and the detailed voltage standing wave ratio graph of FIG. 5 and the schematic voltage standing wave ratio graph of FIG. From low frequency to 4GH
It becomes possible to easily measure the electrical characteristics as accurately as possible over a wide band up to a high frequency around z. Incidentally, FIG.
The characteristics of each marker are shown in the table below.

[0021]

[Table 1] Marker frequency VSWR 1 45.0 MHZ 1.1129 2 1.0125 GHZ 1.0338 3 2.52 GHZ 1.2822 4 4.005 GHZ 1.0581 5 4.635 GHZ 1.3723 Also, each protruding piece 10, ... From the back side of the spring piece 32c
By the elastic support by the auxiliary,
It is possible to prevent the occurrence of damage such as breakage in 0 as much as possible and ensure its durability.

[0022]

As described in detail in the above embodiments, the connection terminal parts and jigs for measuring electric characteristics of electronic parts according to the present invention have the following excellent effects. That is, when the input / output terminal and the ground terminal of the measured electronic component are pressed against the predetermined contacts provided on the surface of each projecting piece of the printed circuit board, each projecting piece is elastically deformed and individually bent, and the elastic force causes each Since the contacts are pressed into contact with the terminals of the electronic parts, the terminals of the electronic parts and the contacts of the printed circuit board can be securely connected without using a conventional probe, and the length varies like probe pins. Since there is no element that acts as an antenna or functions as an antenna, it is possible to prevent standing waves from occurring in the high frequency band due to impedance mismatch, and suppress disturbances such as noise, and wide range from low frequency to high frequency. It becomes possible to measure the electrical characteristics accurately over the band.

Further, when the projecting piece of the printed circuit board is supported by the elastic member from the back surface side, it is possible to prevent the projecting piece from being damaged such as breakage as much as possible, and the durability is improved. Can be secured. Further, when the contact points of the protruding piece are formed to be raised, the contact points and the terminals can be surely connected regardless of their shapes such as the terminals on the measured electronic component side being formed flat. Furthermore, when the protruding piece is formed wide and two adjacent contact points are arranged in parallel,
The area of the ground conductor formed on the back surface of the protruding piece can be increased, and the stability of the characteristics is improved.

When the various printed circuit boards and the like are mounted in a predetermined shield box, the electronic device under test is simply operated by loading the electronic parts under test into the insertion holes and closing the lid. Not only can each terminal of the component be securely connected to each contact of the printed circuit board, and standing waves in the high frequency band due to impedance mismatch can be prevented as much as possible. Disturbance can be suppressed, and more accurate electrical characteristics can be easily measured over a wide range from low frequencies to high frequencies, and damage such as breakage of protruding pieces can occur as much as possible. It can be prevented and the durability can be secured.

[Brief description of drawings]

FIG. 1 is a diagram showing a printed board of a jig for measuring an electronic component according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a shield box accommodating the printed circuit board of FIG.

FIG. 3 is a sectional view of the shield box shown in FIG. 1 in an assembled state.

FIG. 4 is an enlarged view for explaining an essential part in FIG.

FIG. 5 is a graph showing a characteristic of a voltage standing wave ratio of a measuring jig for an electronic component according to an example of the present invention.

FIG. 6 is a graph schematically showing the characteristics of the voltage standing wave ratio, showing the present example and the conventional example in comparison.

[Explanation of symbols]

 2 printed circuit boards 4a, 4b, 4c, 4d stripline conductors 6 ground conductors 10 protruding pieces 12 contacts 20 shield boxes 26b insertion holes 30 lids 32c spring pieces as elastic members 40 measured electronic components 40a terminals

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidekatsu Yasushima 5-36-11 Shinbashi, Minato-ku, Tokyo Iwaki Denshi Co., Ltd.

Claims (5)

[Claims] 1. A printed circuit board having a plurality of stripline conductors and a ground conductor and having a hole at a predetermined position, and an integrally formed flexible board extending from an inner peripheral edge of the hole of the printed circuit board. A plurality of projecting pieces having flexibility, and contacts provided on the surface of the projecting pieces for connecting the stripline conductor and the ground conductor to the input / output terminal and the ground terminal of the measured electronic component, respectively. A connection terminal component for measuring electrical characteristics of an electronic component, which is characterized by being provided. 2. A printed circuit board provided with a plurality of strip line conductors and a ground conductor, a plurality of flexible projecting pieces extending integrally from a peripheral portion of the printed circuit board, and each projecting piece. And a contact for connecting the stripline conductor and the ground conductor to the input / output terminal and the ground terminal of the measured electronic component, respectively, and contacting the back surface of each of the projecting pieces to enable pressing. A connecting terminal component for measuring electrical characteristics of an electronic component, comprising: an elastic member. 3. The connection terminal component for measuring electrical characteristics of an electronic component according to claim 1, wherein a contact provided on the surface of the projecting piece is formed in a raised shape. 4. At least one of the projecting pieces is formed to have a wide width, and two adjacent contact points are formed on the projecting piece. Connection terminal parts for measuring electrical characteristics of electronic parts. 5. The electric characteristic measuring connection terminal component according to claim 1, and a shield box for fixing the connection terminal component and storing the connection terminal component therein; Is to expose a plurality of contacts provided on the surface of the projecting piece to the outside and to load an electronic component to be measured, and to measure each input / output terminal and ground terminal of the electronic component to be measured so that the measured electronic component An insertion hole for aligning the components, and a lid body that covers the insertion hole so as to be openable and closable, and that presses the measured electronic component loaded in the insertion hole toward the printed circuit board side when closed, are provided. A jig for measuring the electrical characteristics of electronic components.