JP2004309359A - Crimp type connecting means for flexible wiring and inspection device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp type connecting means for flexible wiring that normally obtains a stable low contact resistance with easy maintenance and a low price, and to provide an inspection device therefor. <P>SOLUTION: The crimp type connecting means electrically connects to an external circuit by putting a plurality of flexible wiring patterns printed on a flexible thin film therein, which includes a dot electrode substrate 2 having dot electrodes D (electrodes including fine mountain-like projections) made grow, a rat cable 4 for connecting between an external measuring circuit MC and the dot electrode substrate 2, a flexible printed wiring part 6, an urethane rubber 8 for pressing the flexible printed wiring part 6 to the dot electrodes D, and a metal base to a metal base 10 for applying a uniform spring pressure to the urethane rubber 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a crimp-type connection device for flexible printed wiring and an inspection method.
[0002]
More specifically, the present invention provides a crimping type connection device for making an electrical connection by crimping or clipping a flexible wiring portion (so-called flexible) such as a flexible printed wiring pattern, and a flexible wiring portion. The present invention relates to an inspection device for inspecting various electrical characteristics related to a unit.
[0003]
[Prior art]
2. Description of the Related Art As electronic devices have been miniaturized in recent years, the use of flexible wiring on a printed circuit board based on a flexible resin, that is, a so-called flexi cable (commonly referred to as a flexible cable) has been increasing for wiring inside the electronic device. Further, as is often the case in laser pickup devices for CDs, etc., a signal processing circuit itself is also manufactured on a flexible substrate by being integrated with a flexible cable.
[0004]
In the process of manufacturing such an electronic device, it is necessary to electrically connect a flexible wiring portion (that is, one end of a flexible cable) to a measuring device in order to perform adjustment or inspection. In this case, the following three methods are currently known.
[0005]
The first method is to use a flexible cable connector for a product also during production inspection. That is, this is a method of diverting the connector used in the final product for inspection. This method has an advantage that adjustment or inspection can be performed in the same state as that used by the end user.
[0006]
However, since the connector for the final product is not detached after being connected once in a normal use, the durability in the case of repeated attachment and detachment is not generally guaranteed. Therefore, when a large number of units are produced per day on a mass production line, it is necessary to replace the connectors at least twice a day, for example.
[0007]
The second method is a method of arranging and pressing needle-like contact pins CP on the wiring pattern of the flexible printed wiring portion FPW as shown in FIGS. 1 and 2 (for example, Non-Patent Document 1). This second method is a method that has been conventionally used in a pin board tester or the like.
[0008]
As described in Japanese Patent Application Laid-Open Publication No. 2002-25656 (Patent Document 1), a third technique is to attach a base member to the base member so that the tip side is openable and closable, and attach the base member to the tip side. A movable member provided with a pressure contact member, and a laminated substrate provided inside the base member and provided with a contact terminal group at least on the distal end side, and the contact terminal group of the laminated substrate and the pressing member measure or This is a method using a connector for holding a terminal unit on the check device side.
[0009]
[Patent Document 1]
JP-A-2002-25656 (page 1, FIG. 1, FIG. 4, FIG. 8)
[0010]
[Non-patent document 1]
(Yokowo DS Co., Ltd., "Catalog Catalog of Clip Connectors and Inspection Tools, 2002", page 3, page 8, page 15, page 44, page 45, page 56)
[0011]
[Problems to be solved by the invention]
However, in the second method described above, for example, when a flexible cable having an electrode pitch of about 0.5 mm is used, there is a problem in terms of maintenance because a very thin contact pin CP must be used.
[0012]
In other words, there is a problem that maintenance is not good in terms of troubles in replacement, troubles in cleaning, and costs involved in replacement due to a minute dust clogging the tip of the contact pin CP. there were. Further, since the contact tip of the contact pin CP is thin, there is a problem that the wiring pattern of the flexible printed wiring portion FPW is damaged.
[0013]
Furthermore, since the contact area of the contact pin CP at the pin tip is small, there is a problem that the contact resistance with the wiring pattern is not stable.
[0014]
In view of the above, an object of the present invention is to provide a crimping connection device and an inspection device for a flexible wiring, which can always obtain a stable and low contact resistance, are easy to maintain, and are inexpensive. It is in.
[0015]
Patent Document 1, which discloses the third method, discloses that “contact terminals on a laminated substrate can be formed at a small pitch arbitrarily. It is possible to cope with flexible cables in which wiring is performed in an appropriate state. "
[0016]
However, in the connector of Patent Literature 1, since the electrodes are directly formed by the copper foil pattern, there is a problem in that if a small electrode is to be formed at a narrow pitch, the wiring pattern must be thin. However, making the pattern thinner leads to an increase in electric resistance and also makes it difficult to manufacture, so that there is a limit to the shape and size of the electrode. Furthermore, in the connector of Patent Literature 1, since the electrode pattern and the wiring pattern are not separated from each other in structure, there is an inconvenience that a minute multipoint contact electrode cannot be formed.
[0017]
Therefore, another object of the present invention is to provide a crimp-type connection device and an inspection device for flexible wiring, in which a plurality of contact electrodes are formed facing one flexible wiring pattern.
[0018]
[Means for Solving the Problems]
Means for Solving the Problems To achieve the above object, the present invention according to claim 1 is a press-fit type in which a plurality of flexible wiring pattern portions printed on a flexible thin plate are sandwiched and electrically connected to an external circuit. A connection device, comprising: a solid electrode substrate provided with two or more mountain-shaped protruding electrodes facing predetermined positions of each of the flexible wiring pattern portions; and When the flexible wiring pattern portion is inserted between the elastic member pressing the substrate and the elastic member and the solid electrode substrate, an external circuit and the flexible circuit are interposed via at least one of the mountain-shaped projection electrodes. Connection means for connecting to the conductive wiring pattern portion.
[0019]
According to a second aspect of the present invention, in the crimping connection device according to the first aspect, the mountain-shaped protruding electrode forms a copper pattern on the solid electrode substrate, except for a partial region of the copper pattern. A dot electrode in which a resist is applied, a mountain-shaped nickel plating layer is grown on a copper pattern to which the resist is not applied, and a specific metal film is formed on the surface of the nickel plating layer.
[0020]
The present invention according to claim 3 provides a flexible printed circuit pattern or a flexible printed circuit on the flexible thin plate by sandwiching a plurality of flexible wiring pattern portions printed on the flexible thin plate, or An inspection device for inspecting electrical characteristics of a circuit connected to a flexible wiring pattern portion, wherein two or more mountain-like projection electrodes are opposed to predetermined positions of each of the flexible wiring pattern portions. The solid electrode substrate provided, an elastic member for pressing the flexible wiring pattern portion against the solid electrode substrate, and the flexible wiring pattern portion being inserted between the elastic member and the solid electrode substrate. Connecting means for connecting an external characteristic test circuit and the flexible wiring pattern portion via at least one of the mountain-like projection electrodes; and a predetermined voltage via two or more of the mountain-like projection electrodes. By flowing to the flexible wiring pattern portion is obtained by anda resistance measuring means for detecting a contact resistance between said mountain shaped protrusion electrodes and the flexible wiring pattern.
[0021]
According to a fourth aspect of the present invention, in the inspection apparatus according to the third aspect, the mountain-shaped projection electrode is a dot-shaped micro-peak-shaped projection grown on the solid electrode substrate, and one flexible At least two mountain-shaped projection electrodes are provided for the conductive wiring pattern, one mountain-shaped projection electrode is connected to one end of the current source and one end of the voltage measurement circuit, and the other mountain-shaped projection electrode is The other end of the current source and the other end of the voltage measurement circuit are connected.
[0022]
According to a fifth aspect of the present invention, in the inspection apparatus according to the third or fourth aspect, the mountain-shaped protruding electrode forms a copper pattern on the solid electrode substrate, except for a partial region of the copper pattern. A dot electrode in which a resist is applied, a mountain-shaped nickel plating layer is grown on a copper pattern to which the resist is not applied, and a specific metal film is formed on the surface of the nickel plating layer.
[0023]
According to a sixth aspect of the present invention, in the inspection apparatus according to any one of the third to fifth aspects, a flexible printed circuit pattern or a flexible printed circuit on the flexible thin plate or the flexible wiring is further provided. Prior to inspecting the circuit connected to the pattern portion, by operating the resistance measuring means, the contact resistance between the mountain-shaped projection electrode and the flexible wiring pattern portion is equal to or less than a predetermined reference value. And determining means for determining whether or not.
[0024]
According to a seventh aspect of the present invention, in the inspection apparatus according to any one of the third to sixth aspects, a power supply of the resistance measuring unit and a power supply of the external characteristic test circuit are insulated.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 3 is a schematic diagram illustrating the principle of a crimping connection device to which the present invention is applied. In this drawing, reference numeral 2 denotes a dot electrode substrate on which dot electrodes (= electrodes having fine projections in a mountain shape) D are grown. Reference numeral 4 denotes a flat cable for connecting the external measurement circuit MC and the dot electrode substrate 2. Reference numeral 6 denotes a flexible printed wiring unit (commonly referred to as flexible). Reference numeral 8 denotes urethane rubber for pressing the flexible printed wiring portion (flexible) against the dot electrode D. Note that, instead of the urethane rubber 8, another generally known flexible material may be used. Reference numeral 10 denotes a metal base for applying a uniform spring pressure to the urethane rubber 8. This spring pressure is obtained by a spring shown in FIG.
[0026]
FIG. 4 is an explanatory diagram in which the surface of the dot electrode substrate 2 shown in FIG. 3 is enlarged. In the example shown in this figure, four dot electrodes are provided for one flexible wiring (one channel). Therefore, when the length of the wiring pattern in the flexible printed wiring section (flexible) 6 is short, or when it is better to reduce the number of the dot electrodes D due to the material of the dot electrode substrate 2, the dot electrode The number can be smaller (for example, two) for one flexible wiring.
[0027]
Further, the number of dot electrodes may be one for one flexible wiring. However, in consideration of the measurement of the contact resistance described later (see FIGS. 12 to 15), it is preferable that the number of the dot electrodes D is two for one flexible wiring. is there.
[0028]
In order to grow the dot electrode D shown enlarged below in FIG. 4, for example, a resist is first applied to the copper pattern electrode portion, and a hole having a diameter of about 0.1 mm is formed in the resist. In this state, when electrolytic nickel (or copper) plating is applied, mountain-shaped nickel (or copper) swells from the hole of the resist. Then, when the mountain-shaped nickel (or copper) is raised, for example, by about 50 μm, gold (or nickel and gold or silver) is plated to complete the dot electrode. The above-mentioned copper, nickel, gold, and silver are merely examples. That is, as long as the dot electrode satisfies predetermined electrical characteristics and mechanical strength, its constituent material and manufacturing method are not limited. The dot electrode forming process will be described later in detail with reference to FIGS.
[0029]
FIG. 5 is a perspective view showing a connector (hereinafter, referred to as a flex clamper) actually manufactured based on the principle diagram shown in FIG. FIG. 6 is a side view, a front view, and a plan view for showing the configuration of the flexible clamper in detail. In the flexible clamper shown in FIGS. 5 and 6, it is necessary to insert the flexible printed wiring section (flexible) along the flexible guide so that the wiring pattern is directed downward. In other words, this flexible clamper is configured so that the dot electrodes face upward. However, another external circuit or the like may be connected to the other end of the flexible printed wiring section (flexible) (not shown), and it is suitable that the wiring pattern of the flexible printed wiring section (flexible) is directed upward. In some cases. In this case, it is necessary to configure the dot electrode so as to face downward. However, since this is a normal design item, the description is omitted.
[0030]
FIG. 7 is an enlarged view of the dot electrode substrate 2 shown in FIG. 5 and FIG. As shown in the upper part of the figure, six dot electrodes are grown at positions facing each wiring pattern of the flexible printed wiring portion (flexible). These dot electrodes are connected to a measurement circuit MC (see FIG. 3) via respective wiring patterns.
[0031]
FIG. 8 is an enlarged view clearly showing the relationship between the six dot electrodes shown in FIG. 7 and the wiring patterns on the substrate. In this example, a set of three dot electrodes is provided for each channel. That is, six dot electrodes are arranged to face one wiring pattern in the flexible printed wiring portion (flexible), and these six dot electrodes are divided into two sets. This makes it possible to measure the contact resistance between each wiring pattern in the flexible printed wiring portion (flexible) and the dot electrode (described later with reference to FIG. 13).
[0032]
FIG. 9 is a diagram showing processing steps for forming a dot electrode substrate. As shown in this figure, in “1. Pretreatment step”, oil and fat are removed and the surface is modified (that is, the surface is roughened by a chemical, so that plating is easily performed on the copper foil surface of the substrate). To improve the bite).
In “2. plating step”, plating by an electrolytic method is performed. The substrate is immersed in the electrolytic solution, and a current is applied to a portion to be plated, whereby metal ions in the solution are adsorbed on the substrate surface and grown.
In “3. post-processing step”, unnecessary chemicals are washed.
In “4. Inspection process”, an appearance / film thickness inspection is performed.
[0033]
FIG. 10 is an explanatory diagram showing the plating step of forming the mountain-shaped dot electrode in more detail. As shown in FIGS. 3A and 3B, a resist is first applied to the copper pattern electrode, and a hole having a diameter of about 0.1 mm is formed in the resist. In this state, when electrolytic nickel (or copper) plating is applied as shown in FIG. 3C, the mountain-shaped nickel (or copper) rises from the hole of the resist. Then, when the mountain-shaped nickel (or copper) swells, for example, by about 50 μm, gold (or nickel and gold, or silver) is plated as shown in FIG.
[0034]
FIG. 11 shows another crimp-type connecting device different from the flex clamper shown in FIGS. 5 and 6. In the example shown in this figure, the dot electrodes are mounted downward, so that the flexible printed wiring section (flexible) can be inserted so that the wiring pattern faces upward. That is, the flexible printed wiring section (flexible) is inserted by operating the lever at the unclamping position depicted in FIG. 11A, and the flexible printed wiring section is operated by operating the lever at the position shown in FIG. 11B. Clamp the part (flexible).
[0035]
FIG. 12 illustrates the principle of measuring the contact resistance between a flexible pattern (= flexible printed wiring section (flexible) wiring pattern) FPN and a dot electrode using _two dot electrodes D ₁ and D ₂ . FIG. As shown in the present Figure (B), the contact resistance between the dot electrodes D ₁ and flexible pattern FPN is R _1, the contact resistance between the dot electrodes D ₂ and flexible pattern FPN is a R ₂ Then, the contact resistance _RT measured between the two dot electrodes D ₁ and D ₂ is
R _T = R ₁ + R ₂ (1)
It becomes.
[0036]
In FIG. 12, the case where the contact resistance between the flexible pattern FPN and the dot electrode is measured using _two dot electrodes D ₁ and D ₂ has been described, but the number of dot electrodes is limited to two. Never.
[0037]
It is necessary to insulate the power supply of the Ω meter for measuring the contact resistance from the power supply of the external characteristic measuring device.
[0038]
FIG. 13 is a diagram illustrating a case where contact resistance between a flexible pattern FPN and a dot electrode is measured using six dot electrodes. In the example shown in this figure, the dot electrodes are divided into three dot electrodes in order to measure the contact resistance. The other points are the same as those in FIG.
[0039]
FIG. 14 shows a measurement circuit when measuring the contact resistance between the flexible pattern FPN and the dot electrode using the _two dot electrodes D ₁ and D ₂ . As shown in the figure, the one dot electrodes D _1, from the constant current source 30 via a first analog multiplexer 40A supplies a constant current, the other dot electrode D ₂ and the fourth analog multiplexer 40D The constant current is returned to the constant current source 30 via the power supply. At the same time, the voltage between the _two dot electrodes D ₁ and D ₂ is detected via the second and third analog multiplexers 40B and 40C.
[0040]
The processing circuit 60 calculates the contact resistance based on the voltage information obtained via the amplifier circuit 50 and the constant current value sent from the constant current source 30. An operation panel 70 is connected to the processing circuit 60, and various control signals transmitted from the operation panel 70 are input to the processing circuit 60, and operation results, determination signals, and the like output from the processing circuit 60 are operated. It is sent to the panel 70.
[0041]
The same measurement can be performed for the remaining three channels.
[0042]
As is clear from the above description, the circuit for measuring the contact resistance (Ω meter in FIG. 12B) is isolated from the circuit for inspecting the flexible printed circuit (flexible) itself. Therefore, it is possible to separately measure only the contact resistance while being connected to the flexible inspection circuit (that is, in the in-circuit state).
[0043]
In addition, in the above-described equation (1) of R _T = R ₁ + R ₂ , when the contact resistance on the side connected to the flexible inspection circuit is R ₁ , the upper limit of R _T is equal to or less than a predetermined R _S By managing so that R ₁ is at least smaller than R _T , it can be guaranteed that the contact resistance R ₁ is smaller than R _S.
[0044]
Although FIG. 14 illustrates the case where two dot electrodes are arranged to face one wiring pattern in the flexible printed wiring portion (flexible), one wiring in the flexible printed wiring portion (flexible) is described. The same processing can be performed in a case where six dot electrodes are arranged to face the pattern, and the six dot electrodes are divided into two sets (see FIG. 13).
[0045]
FIG. 15 is a schematic plan view of the operation panel 70 shown in FIG. When the start button SB shown in the figure is pressed, the contact resistance of all channels (for example, 30 channels) is continuously measured. When the contact resistance of all channels is equal to or less than the “determination reference value”, the OK lamp OKLED is turned on. On the other hand, if not, at the same time when the NG lamp NGLED is turned on, the number of the channel whose measured contact resistance exceeds the “determination reference value” and the measured resistance value are simultaneously (or alternately) displayed on the display DISP. Will be displayed.
[0046]
The first dip switch DSW1 is a switch for shifting to a manual mode. Each time the first DIP switch DSW1 is pressed, the channel is increased one channel at a time, and the selected channel number and its measured resistance value are simultaneously (or alternately) displayed on the display DISP.
[0047]
The second dip switch DSW2 is a switch for shifting to a mode for setting the “judgment reference value”. In this mode, the “judgment reference value” increases each time the start button SB is pressed, and the “judgment reference value” decreases each time the reset button RB is pressed.
[0048]
In the above description, a specific example in which the flexible printed wiring portion (flexible) is sandwiched between the flexible clampers (connectors) has been described. However, when the connection target is not flexible but is a rigid electrode, a flexible dot electrode is used. The connector can be formed by using the substrate.
[0049]
【The invention's effect】
As described above, according to the present invention, it is possible to realize a crimp-type connection device and an inspection device for flexible wiring that can always obtain a stable and low contact resistance, are easy to maintain, and are inexpensive. it can.
[0050]
More specifically, the following special effects can be obtained.
[0051]
1) Since two or more projecting electrodes (dot electrodes) are used for each channel, not only the contact resistance is reduced, but also dust and foreign matter on the electrode surface are pushed out of the electrode area, and maintenance is difficult. Is excellent. That is, unlike a conventionally known contact pin, dust and foreign matter on the electrode surface do not enter the inside of the pin. As a result, a stable low contact resistance can always be exhibited regardless of the surface state of the wiring pattern in the flexible printed wiring portion (flexible). Further, since the electrode shape is simple, cleaning can be easily performed.
[0052]
2) Since it does not have a complicated structure like a conventionally known contact pin, breakage and wear are extremely reduced, and it is possible to withstand repeated long-term use.
[0053]
3) Unlike a conventionally known contact pin, a thin pin tip is not pressed against a flexible printed wiring portion (flexible), so that there is almost no possibility of damaging a product.
[0054]
4) Since the mountain-shaped protruding electrodes (dot electrodes) according to the present invention can be formed by a normal printed circuit board manufacturing process, the manufacturing cost can be reduced.
[0055]
5) By forming the dot electrode according to the present invention, a plurality of inspection electrodes can be brought into contact with a flexible pattern having a small area. This makes it possible to accurately and easily measure the contact resistance even for a small flexible electrode.
[0056]
That is, since the size and arrangement pattern of the dots according to the present invention are determined by the resist pattern applied on the copper foil pattern, the degree of freedom of the shape and size becomes very large. In addition, it is possible to produce as many small electrodes as irrespective of the wiring pattern, as long as the fabrication accuracy of the resist pattern allows. In addition, by devising a copper foil pattern and a resist pattern according to the application, an optimum electrode can be manufactured. For example, according to the present invention, a circular electrode having a diameter of about 150 microns can be easily produced.
[0057]
6) According to the present invention, the size and arrangement pattern of the dot electrodes are determined by the resist pattern applied on the copper foil pattern, so that the degree of freedom in the shape and size can be greatly increased. In addition, irrespective of the wiring pattern, any number of small electrodes can be made as long as the manufacturing accuracy of the resist pattern allows. Thus, an optimal electrode can be manufactured by devising a copper foil pattern and a resist pattern according to the application. For example, a circular electrode having a diameter of about 150 microns can be easily formed. Therefore, by forming a large number of such dot electrodes at a narrow pitch, it is possible to form dot electrodes that contact at many points within a minute area.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a related art showing a method of arranging and pressing a needle-shaped contact pin CP on a wiring pattern of a flexible printed wiring portion FPW.
FIG. 2 is an explanatory view of a related art showing a method of arranging and pressing a needle-shaped contact pin CP on a wiring pattern of a flexible printed wiring portion FPW.
FIG. 3 is a schematic diagram illustrating the principle of a crimping connection device to which the present invention is applied.
FIG. 4 is an explanatory diagram in which the surface of the dot electrode substrate 2 shown in FIG. 3 is enlarged.
FIG. 5 is a perspective view showing a connector (referred to as a flex clamper) actually manufactured based on the principle diagram shown in FIG. 3;
FIG. 6 is a side view, a front view, and a plan view for showing the configuration of the flexible clamper shown in FIG. 5 in detail.
FIG. 7 is an enlarged view of the dot electrode substrate 2 shown in FIGS. 5 and 6;
8 is an enlarged view clearly showing a relationship between the six dot electrodes shown in FIG. 7 and a wiring pattern on a substrate.
FIG. 9 is a diagram showing a processing step for forming a dot electrode substrate.
FIG. 10 is an explanatory diagram showing in more detail a plating step of forming a mountain-shaped dot electrode.
FIG. 11 is a view showing another crimping connection device different from the flex clamper shown in FIGS. 5 and 6;
FIG. 12 shows a principle of measuring a contact resistance between a flexible pattern (= flexible printed wiring portion (flexible) wiring pattern) FPN and a dot electrode using _two dot electrodes D ₁ and D ₂ . FIG.
FIG. 13 is a diagram illustrating a case where contact resistance between a flexible pattern and a dot electrode is measured using six dot electrodes.
FIG. 14 is a diagram illustrating a measurement circuit when measuring contact resistance between a flexible pattern and a dot electrode using _two dot electrodes D ₁ and D ₂ .
15 is a schematic plan view of the operation panel 70 shown in FIG.
[Explanation of symbols]
2 Dot electrode substrate 4 Flat cable 6 Flexible printed wiring section 8 Urethane rubber 10 Metal base

Claims (7)

A crimping connection device that sandwiches a plurality of flexible wiring pattern portions printed on a flexible thin plate and electrically connects to an external circuit,
A solid electrode substrate in which two or more mountain-shaped protruding electrodes are disposed, facing a predetermined position of each of the flexible wiring pattern portions;
An elastic member for pressing the flexible wiring pattern portion against the solid electrode substrate,
When the flexible wiring pattern portion is inserted between the elastic member and the solid electrode substrate, an external circuit and the flexible wiring pattern portion are connected via at least one mountain-like projection electrode. Connecting means to
A crimping connection device, comprising: The crimping connection device according to claim 1,
The mountain-like projection electrode,
A copper pattern is formed on the solid electrode substrate, a resist is applied except for a part of the copper pattern, and further a mountain-shaped nickel plating layer is grown on the copper pattern on which the resist is not applied, A crimping connection device, which is a dot electrode having a specific metal film formed on the surface of a nickel plating layer. By sandwiching a plurality of flexible wiring pattern portions printed on a flexible thin plate, a flexible printed wiring or a flexible printed circuit on the flexible thin plate, or connected to the flexible wiring pattern portion An inspection device for inspecting electrical characteristics of a circuit,
A solid electrode substrate in which two or more mountain-shaped protruding electrodes are disposed, facing a predetermined position of each of the flexible wiring pattern portions;
An elastic member for pressing the flexible wiring pattern portion against the solid electrode substrate,
When the flexible wiring pattern portion is inserted between the elastic member and the solid electrode substrate, an external characteristic test circuit and the flexible wiring pattern portion are connected via at least one of the mountain-shaped projection electrodes. Connection means for connecting
A resistance for detecting a contact resistance between the mountain-shaped projection electrode and the flexible wiring pattern portion by flowing a predetermined current to the flexible wiring pattern portion through the two or more mountain-shaped projection electrodes. Measuring means;
An inspection apparatus comprising: The inspection device according to claim 3,
The mountain-shaped projection electrode is a dot-shaped minute mountain-shaped projection grown on the solid electrode substrate,
At least two ridge-shaped projection electrodes are provided for one flexible wiring pattern, and one ridge-shaped projection electrode is connected to one end of a current source and one end of a voltage measurement circuit, and the other ridge-shaped projection electrode is connected to one end of a voltage measurement circuit. An inspection device, wherein the protruding electrode is connected to the other end of the current source and the other end of the voltage measurement circuit. The inspection device according to claim 3 or 4,
The mountain-like projection electrode,
A copper pattern is formed on the solid electrode substrate, a resist is applied except for a part of the copper pattern, and further a mountain-shaped nickel plating layer is grown on the copper pattern on which the resist is not applied, An inspection apparatus comprising a dot electrode having a specific metal film formed on a surface of a nickel plating layer. The inspection device according to any one of claims 3 to 5, further comprising:
Before inspecting a flexible printed wiring pattern or a flexible printed circuit on the flexible thin plate, or a circuit connected to the flexible wiring pattern portion, operating the resistance measuring means to form the mountain-like shape. An inspection apparatus comprising: a determination unit configured to determine whether a contact resistance between a protruding electrode and the flexible wiring pattern unit is equal to or less than a predetermined reference value. The inspection device according to any one of claims 3 to 6,
A power supply for the resistance measuring means and a power supply for the external characteristic test circuit are insulated.

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