JP4387292B2 - Electrical inspection apparatus and electrical inspection method for flexible printed circuit board - Google Patents

Description

  The present invention relates to an electric inspection apparatus and an electric inspection method for a flexible printed circuit board, and more particularly, to an electric inspection apparatus and an electric inspection apparatus for a flexible printed circuit board in which a movable pin for connecting a board is formed by a spring type probe. It is about the method.

  Conventionally, in the manufacturing process of a flexible printed circuit board, a spring with a built-in spring that expands and contracts its length in order to inspect electrical performance such as disconnection and short circuit of a wiring pattern formed on the flexible printed circuit board A type probe is used. In this spring type probe, the tip of the probe comes into contact with the flexible printed circuit board (inspection object) during electrical inspection, and the inspection object is pushed down, and the probe tip is inspected by the spring pressure of the spring. Pressed against. As described above, conventionally, an electrical inspection such as a short circuit or disconnection of the wiring pattern is performed by an electrical inspection apparatus using a spring type probe.

  In particular, the flexible printed circuit board is an adhesive-type copper-clad laminate in which a copper foil is bonded to at least one surface of an insulating base material made of a flexible insulating resin film such as a polyimide film via an adhesive. Or, using a non-adhesive copper clad laminate in which copper foil is directly bonded without using an adhesive, forming a resist layer on the copper foil surface, or exposing / developing / peeling / exposing the resist layer A process of forming a wiring pattern by a series of photofabrication methods of etching processing on the copper foil, forming a component mounting land, a surface protection layer corresponding to a land for connection to an external substrate, and cutting an outer shape It is manufactured after that.

  Such a flexible printed circuit board is characterized in that the constituent material is thin and the constituent material itself is softer than a substrate using another glass epoxy or ceramic as an insulating base material. Therefore, in the inspection of the electrical performance using the spring type probe, it is necessary to consider that the flexible printed circuit board is not broken by the tip of the probe.

  In particular, in recent years, with the miniaturization and weight reduction of devices, flexible printed circuit boards have become increasingly finer due to the miniaturization of wiring patterns and the miniaturization of mounted components. The tip portion of the mold probe is further miniaturized, and a probe having a sharp tip shape has been adopted (Patent Document 1).

  Here, the configuration of the conventional electrical inspection apparatus will be described in detail. FIG. 8 is a cross-sectional view of an essential part showing a movable pin portion for connecting a substrate of a conventional electrical inspection apparatus. In the figure, reference numeral 1 denotes an electric check upper base provided so as to be capable of moving up and down, and a flexible printed circuit board 2 is disposed on the lower surface side of the electric check upper base 1. On the lower side of the flexible printed circuit board 2, a positioning guide plate 3 and a pin board 4 are sequentially arranged. A plurality of board connecting movable pins 5, 5... 5 are fixed to the pin board 4. Yes. As the movable pins 5, 5, 5, a spring type probe is used that contracts when pressure is applied and restores when the pressure is released.

  Through holes 6, 6... 6 having slightly larger diameters than the movable pins 5, 5... 5 are opened at a plurality of locations corresponding to the substrate connecting movable pins 5, 5. The substrate connecting movable pins 5, 5,... 5 can be freely fitted through the through holes 6, 6,. Further, a plurality of guide pins are provided at predetermined positions of the pin board 4, and project through the guide plate 3 through a through hole having a diameter larger than that of the guide pin provided in the guide plate 3. The flexible printed circuit board 2 is positioned by the guide pins.

  FIG. 9 is a conceptual diagram showing a conventional electrical inspection apparatus, which includes a plurality of board connecting movable pins 5 and 5 that abut against the land portion of the flexible printed circuit board 2 during electrical inspection. ... a pin part having 5, a changeover switch part (scan part) 7 having a plurality of points AF corresponding to each of the substrate connecting movable pins 5, 5... 5, and points A to F of the changeover switch part 7 A tester unit (measurement unit) 8 that is electrically connected is schematically configured. Therefore, by switching the point of the changeover switch unit 7, the conduction of each conductive pattern formed on the flexible printed board 2 and the electrical insulation test between the conductive patterns can be individually performed.

Thus, at the time of the electrical inspection, the substrate connecting movable pins 5, 5,... After setting the flexible printed circuit board 2, the base 1 is lowered while maintaining parallel on the electrical check, and the flexible printed circuit board 2 is pressed against the guide plate 3 as shown in FIG. 11. As shown in FIG. 12, the flexible printed circuit board 2 is pressed and moved until the electric check upper base 1 reaches a predetermined position between the electric check upper base 1 and the pin board 4. 5, 5... 5 are shortened by receiving a reaction force from the flexible printed circuit board 2.
JP-T 2002-511938

  By the way, in the conventional electrical inspection apparatus, in order to maintain the electrical reliability between the board connecting movable pins 5, 5... 5 and the flexible printed board 2, the board connecting movable pins 5, 5. The land contact portion of 5 has an acute tip shape and requires a high contact pressure of a predetermined value or more. In particular, the board connecting movable pins 5, 5... 5 used for the inspection of the component mounting product have a higher contact pressure and the board connecting movable pins 5, 5. Is required to use.

  Here, the high contact pressure of the substrate connecting movable pins 5, 5... 5 means that the spring constant of the spring built in the movable pins 5, 5. It is easy to do. In addition, since the contact pressure of the substrate connecting movable pins 5, 5,... 5 is high, the substrate connecting movable pins 5, 5,. It's easy to do. If the electrical inspection of the flexible printed circuit board 2 is performed in a state in which a pin operation failure has occurred, the flexible printed circuit board 2 is attached to the substrate as shown in FIG. There may be a serious problem that the distal ends of the connecting movable pins 5, 5.

  However, in the conventional configuration, even if the board connecting movable pins 5, 5... 5 pass through the flexible printed circuit board 2, this cannot be detected, so the board connecting movable pins 5, 5. It was not detected and judged to be in a defective state, that is, a “pin operation abnormal state”.

  Therefore, even when a serious failure such as pin penetration of the flexible printed circuit board 2 due to a failure of the movable pins 5, 5... As long as the electrical inspection apparatus and the electrical inspection apparatus are kept in electrical connection, the manufacturing operation of the flexible printed circuit board 2 is continued as it is. As a result, the flexible printed circuit board 2 is manufactured while the pin operation is in an “abnormal” state, which damages the flexible printed circuit board 2 one after another, which is extremely inconvenient in the substrate manufacturing operation.

Therefore, the failure of the movable pin for connecting the board (spring type probe) is immediately detected and specified, and the continuous occurrence of serious damage such as perforation of the flexible printed circuit board due to the failure of the movable pin is suppressed. A technical problem to be solved in order to enable mass production of a flexible printed board stably arises, and the present invention aims to solve the problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that the board connecting movable pin capable of contacting the land portion of the flexible printed board has a pressure load. In an electrical inspection device formed by a spring type probe that shortens and expands according to
A conductive plate is disposed on the surface of the flexible printed board opposite to the surface on which the movable pins for connecting the substrate abut, and the space between the conductive plate end and the flexible printed circuit board or A conductive plate connection terminal portion that is electrically connected to the conductive plate is provided at a location of the through hole opened in the flexible printed circuit board, and the conductive plate connection terminal portion and the movable pin for substrate connection are provided. Provided is a flexible printed circuit board electrical inspection device configured to detect that the movable pin for connecting the board has penetrated the flexible printed circuit board by measuring a short circuit occurring therebetween.

  According to this configuration, the conductive plate connecting terminal portion (common terminal portion) is electrically connected to the conductive plate by the time of electrical inspection when the substrate connecting movable pin comes into contact with the land portion of the flexible printed circuit board. What is necessary is just to comprise. For example, specific embodiments of the terminal part include a movable terminal pin made of a spring-type probe that is fixed to a pin board and contacts the conductive plate by the time of electrical inspection, or wiring directly connected to the conductive plate. It is.

  At the time of electrical inspection, the board connecting movable pin abuts on the land portion of the flexible printed circuit board, but the conductive plate connecting terminal portion is electrically connected to the conductive plate before or at the time of contact. If the movable pin for board connection penetrates the flexible printed circuit board due to a failure, the tip of the movable pin for board connection contacts the conductive plate, and the movable pin for board connection and the conductive plate are connected via the conductive plate. Cause a short circuit with the terminal. By detecting this short by the measuring means, it is automatically detected that the movable pin for connecting the board has penetrated the flexible printed board.

  According to a second aspect of the present invention, there is provided an electrical inspection apparatus for a flexible printed circuit board according to the first aspect, wherein a plurality of the conductive plate connecting terminal portions are provided.

  According to this configuration, since a plurality of conductive plate connection terminal portions are provided, even if one of the plurality of conductive plate connection terminal portions, for example, two of the conductive plate connection terminal portions causes an electrical malfunction. The electrical inspection is performed by the other conductive plate connecting terminal portion. Further, by testing the presence or absence of conduction between the two conductive plate connection terminal portions, it is determined whether or not the electrical connection of one or both of the two conductive plate connection terminal portions is normal.

According to a third aspect of the present invention, there is provided an electrical inspection method in which a movable pin for connecting a substrate capable of contacting a land portion of a flexible printed circuit board is formed by a spring-type probe that is shortened and extended depending on the presence or absence of a pressure load. A conductive plate disposed on a surface of the flexible printed board opposite to a surface on which the movable pin for connecting the substrate contacts , a space between the conductive plate end and the flexible printed circuit board, or the After electrically connecting the conductive plate connecting terminal portion provided at the through hole formed in the flexible printed circuit board, the movable pin for connecting the substrate is brought into contact with the land portion of the flexible printed circuit board. Then, by measuring a short circuit generated between the board connecting movable pin and the conductive plate connecting terminal portion, it is detected that the board connecting movable pin has penetrated the flexible printed board. Providing an electrical inspection method of a flexible printed circuit board, characterized by.

According to this configuration, when the electrical inspection is performed, the conductive plate connecting terminal portion is electrically connected to the conductive plate, and then the substrate connecting movable pin is brought into contact with the land portion of the flexible printed board. Thus, when the board connecting movable pin breaks down and penetrates the flexible printed circuit board, the tip of the board connecting movable pin comes into contact with the conductive plate, and the board connecting movable pin and the conductive plate pass through the conductive plate. A short circuit occurs between the connection terminals. By measuring this short circuit, an abnormal operation state of pin penetration of the flexible printed circuit board is immediately detected.

  According to a fourth aspect of the present invention, the electrical connection between the conductive plate connection terminal portion connected to the conductive plate and the plurality of substrate connection movable pins is individually switched, and the conductive plate connection terminal portion and each substrate connection are switched. 4. The electrical inspection of a flexible printed circuit board according to claim 3, wherein a movable pin for board connection that penetrates the flexible printed circuit board is detected and specified by measuring the presence or absence of a short circuit occurring between the movable printed circuit board and the movable printed circuit board. Provide a method.

  According to this configuration, by sequentially switching and scanning the electrical connection between the other end portion of the conductive plate connecting terminal portion and the plurality of movable pins for connecting the substrate, the conductive plate connecting terminal portion and the substrate connecting terminals The presence or absence of a short circuit occurring with the movable pin is individually measured. Therefore, when any of the plurality of board connecting movable pins breaks down and penetrates the flexible printed circuit board, a short circuit between the penetrating board connecting movable pin and the conductive plate connecting terminal portion is measured. The penetrated board connecting movable pin is specified.

  According to the first aspect of the present invention, when the movable pin for connecting the board passes through the flexible printed board, the abnormal operation state is detected and discriminated, so that the manufacturing operation of the flexible printed board can be stopped immediately. Therefore, it is possible to immediately suppress the occurrence of continuous perforation (abnormal operation state of pin penetration) due to the failure of the movable pin for board connection, and to stably mass-produce the flexible printed board. There is an effect. That is, until now, unless each individual flexible printed circuit board is confirmed by visual inspection, damage due to perforation of the flexible printed circuit board could not be detected. Since the damage can be automatically detected at an early stage and the production work of the flexible printed circuit board can be stopped immediately, a high-quality flexible printed circuit board can be stably produced and the production efficiency is increased.

  According to the second aspect of the present invention, even if any of the plurality of conductive plate connecting terminal portions malfunctions, the remaining conductive plate connecting terminal portions can perform electrical inspection. In addition to the effect of the present invention, it has an excellent advantage that electrical inspection can be carried out more reliably. Further, by measuring the presence or absence of a short circuit between the plurality of conductive plate connecting terminal portions, the normal / abnormal state of the electrical connection between the conductive plate connecting terminal portions can be determined by self-diagnosis.

  According to the third aspect of the present invention, since the abnormal operation state of pin penetration of the flexible printed circuit board can be automatically detected immediately, the occurrence of continuous perforation of the flexible printed circuit board due to a pin failure is prevented in advance. be able to.

  According to the fourth aspect of the present invention, it is possible to easily and reliably identify a faulty board connecting movable pin at an early stage by individually measuring the presence or absence of a short circuit between the conductive plate connecting terminal portion and each board connecting movable pin. In addition to the effect of the invention described in claim 3, the merit of efficiently manufacturing a high-quality flexible printed circuit board by replacing the failed movable pin for connecting the substrate with another movable pin for connecting the substrate. Have

The present invention is directed to an electrical inspection apparatus in which a movable pin for board connection that can abut on a land portion of a flexible printed board is formed by a spring-type probe that is shortened and extended in accordance with the presence or absence of a pressure load. A conductive plate is disposed on the surface of the conductive printed board opposite to the surface on which the movable pin for connecting the substrate abuts, and a conductive plate connecting terminal portion (a spring-embedded terminal pin that is electrically connected to the conductive plate) Or a detecting connection line), and measuring the short-circuit between the conductive plate connecting terminal portion and the board connecting movable pin, the board connecting movable pin penetrates the flexible printed board. By detecting this, it is possible to immediately detect a failure of the movable pin for connecting the board, and to expand the hole in the flexible printed circuit board due to the pin failure. The then prevent the flexible printed circuit board to achieve a goal can stably mass production.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same component as a prior art example. In FIG. 1, a conductive plate 10 is provided on the lower surface side of the base 1 for electrical check, and the conductive plate 10 is made of a metal having a required conductivity. The area of the conductive plate 10 is set to a size including the entire area in which movable pins 5, 5... 5 and conductive plate connection terminal pins (terminal portions) 11 described later are provided.

  In addition, a flexible printed circuit board 2 as an inspected product is arranged and set at a lower position corresponding to a portion excluding the left part of the conductive plate 10 of the electric check upper base 1, and the flexible printed circuit board in FIG. The left end portion of 2 is located on the inner side (right side in FIG. 1) by a predetermined dimension than the left end portion of the conductive plate 10.

  A positioning guide plate 3 and a pin board 4 are sequentially disposed on the lower side of the flexible printed board 2, and the left end portions of the guide plate 3 and the pin board 4 are substantially the same as the left end portion of the conductive plate 10. I'm doing it. A plurality of substrate connecting movable pins 5, 5... 5 are fixedly planted at appropriate intervals on a portion of the pin board 4 corresponding to the lower surface of the flexible printed circuit board 2.

  In addition, one conductive plate connection terminal pin 11 is fixedly planted on the left side portion of the pin board 4 that does not correspond to the flexible printed circuit board 2. The conductive plate connection terminal pin 11 is configured to be brought into direct contact with and electrically connected to the conductive plate 10 by raising the left space portion of the flexible printed circuit board 2 at the time of electrical inspection. As the substrate connecting movable pins 5, 5... 5 and the conductive plate connecting terminal pins 11, spring type probes that are shortened by pressurization and restored by releasing the pressurization are used.

  The plurality of positions corresponding to the substrate connecting movable pins 5, 5... 5 and the conductive plate connecting terminal pins 11 of the positioning guide plate 3 have through holes 6 having a slightly larger diameter than the pins 5, 5. , 6... 6 are opened, and through the through holes 6, 6... 6, the board connecting movable pins 5, 5. It is configured to project to Furthermore, a plurality of guide pins for positioning the flexible printed circuit board 2 are provided at appropriate locations on the guide plate 3.

  Note that the left end portion of the flexible printed circuit board 2 does not have to be provided on the inner side of the left end portion of the conductive plate 10 and may be provided so that both left end portions thereof are aligned with each other. In this case, as shown in FIG. 2, through holes 12 are opened at locations corresponding to the conductive plate connecting terminal pins 11 in the flexible printed circuit board 2, and the conductive plate connecting terminal pins 11 are not exposed during electrical inspection. The flexible printed circuit board 2 is formed so as to protrude through and contact the conductive plate 10.

  The location of the conductive plate connecting terminal pin 11 on the pin board 4 is arbitrary, and it is not necessary to provide it at the end portion of the pin board 4. For example, as shown in FIG. 3, the conductive plate connection terminal pins 11 may be disposed at a location between the plurality of substrate connection movable pins 5, 5... 5 in the central region of the pin board 4. In this case as well, it goes without saying that through holes 12 are opened at locations corresponding to the conductive plate connecting terminal pins 11 of the flexible printed circuit board 2.

  In short, the conductive plate connecting terminal pin 11 may be configured to directly contact the conductive plate 10 without contacting the flexible printed circuit board 2 at the time of electrical inspection. Further, a plurality of conductive plate connecting terminal pins 11 can be provided. It is preferable to provide two or more conductive plate connecting terminal pins 11 in order to be able to electrically detect problems such as disconnection of the conductive plate connecting terminal pins 11 themselves. In FIG. 4, two conductive plate connection terminal pins 11 are implanted in the pin board 4, and two conductive plate connection terminal pins 11 are provided on the left and right sides of the substrate connection 5, 5. An arrangement example is shown.

  FIG. 6 is a conceptual diagram showing the electrical inspection apparatus of the present embodiment. The electrical inspection apparatus has a pin portion composed of a plurality of substrate connecting movable pins 5, 5... 5 and conductive plate connecting terminal pins 11, and a point corresponding to the plurality of substrate connecting movable pins 5, 5. A switching switch unit (scanning unit) 13 having A to F and G and a tester unit (measuring unit) 14 electrically connected to points A to F and G of the switching switch unit 13 are schematically configured. . During the electrical inspection, the plurality of substrate connecting movable pins 5 abut on the land portion of the flexible printed circuit board 2, while the conductive plate connecting terminal pins 11 always abut on the lower surface of the conductive plate 10 at all times.

  The tester unit 14 includes a power supply unit, a point switching measurement unit, a measurement data display unit, and the like, and a storage device that stores various measurement data. Therefore, by switching the points A to F of the changeover switch unit 13, an electrical inspection such as electrical insulation between the conductive patterns of the flexible printed board 2 can be performed. In addition, in a state where the point G of the changeover switch portion 13 is closed, a short inspection between the plurality of substrate connecting movable pins 5, 5... 5 and the conductive plate connecting terminal portion conductive plate 10 can be performed individually.

  Therefore, when performing an electrical inspection, after setting the front ends of the board connecting movable pins 5, 5,... The flexible printed board 2 is pressed against the guide plate 3 side. By this pressing operation, the board connecting movable pins 5, 5... 5 and the conductive plate connecting terminal pins 11 come into contact with the lower surfaces of the flexible printed board 2 and the conductive plate 10, respectively.

  According to the electrical inspection apparatus used here, scanning can be performed to detect the presence or absence of a conductive state between the plurality of substrate connecting movable pins 5, 5... 5 and the conductive plate connecting terminal pins 11. That is, the electrical inspection apparatus is a short / open determination means that can individually confirm whether or not the pins 5, 5... 5 and 11 are electrically short-circuited (open), that is, the changeover switch unit 13, the tester. Part 14 and the like.

  In a general electrical inspection method, it is confirmed whether or not an electrical short circuit has occurred between the plurality of substrate connecting movable pins 5, 5. As a method for confirming whether or not the short circuit has occurred, one electrical inspection signal for detection is input for each of the substrate connecting movable pins 5, 5. Then, regarding whether or not the electrical inspection signal is detected by the other substrate connecting movable pins 5, 5... 5, all the other substrate connecting movable pins 5, 5. Perform individual performance checks.

  Here, at the time of initial setting of the electrical inspection apparatus, the designated board connection movable pins 5, 5,... 5 are preset, and an electrical inspection signal other than the set board connection movable pins 5, 5,. When detected, it is determined that the movable pin 5 is short-circuited. Further, when an electrical inspection signal is not detected for the designated designated board connection movable pins 5, 5,... 5 that are initially set, it is determined that the movable pins 5 are not short-circuited, that is, are open. Is done.

Next, an example of the inspection operation by the electrical inspection apparatus will be described in detail. When checking the normal electrical connection state, in the configuration example of FIGS. 4 and 7, two conductive plate connection terminal pins 11 are used.
By confirming the conduction state between them, it is confirmed that the conductive plate connecting terminal pins 11 are operating normally, and thereafter, the electrical performance of the flexible printed circuit board 2 is inspected.

  In FIG. 6, when an electrical test signal is input to point A of the changeover switch unit 13, if the wiring pattern has normal electrical performance, the electrical test signal is output only to point F of the changeover switch unit 13. .

  On the other hand, when the wiring pattern has an abnormal electrical performance, for example, when a short circuit occurs between adjacent wiring patterns, the electrical inspection signal input to the point A corresponds to the wiring pattern in which the short circuit has occurred. It is also output to points B and E. Then, with all the points A to F and G of the changeover switch unit 13 turned on, the tester unit 14 detects the electrical inspection signal and outputs a difference between the detected value and the initial set value to detect a short circuit. Yes.

  Here, when the designated board connecting movable pin 5 is in the open state, the electrical inspection signal input to the point A is not output from the other point F. From this, it can be detected as a disconnection of the wiring pattern or an abnormal operation of the specified board connecting movable pin 5.

  Therefore, in the electrical inspection using the above-described detection principle, when any of the movable pins 5, 5, 5 for connecting the substrate passes through the flexible printed circuit board 2, the movable pins 5 for connecting the substrate and the conductive plate that have passed therethrough. An electrical connection is established between 10 and 10. Thereby, the movable pin 5 in an abnormal operation state can be specifically identified.

  In order to detect an abnormal operation state of pin penetration, when inspection is performed with point A and point G closed, the board connecting movable pin 5 corresponding to point A breaks down and penetrates the flexible printed board 2. When this occurs (see FIG. 13), the tip of the board connecting movable pin 5 comes into contact with the conductive plate 10 on the upper side of the flexible printed board 2 and is electrically connected.

  As a result, the board connecting movable pin 5 and the conductive plate connecting terminal pin 11 are electrically connected to each other to cause a short circuit therebetween. This short is measured by the tester unit 14, and a short-circuit occurs between the non-designated board connecting movable pin 5 and the conductive plate connecting terminal pin 11, that is, the board connecting movable pin 5 corresponding to the point A. Is determined to be in a “malfunction” state.

  As described above, when any of the movable pins 5, 5... 5 for board connection penetrates the flexible printed circuit board 2 and comes into contact with the conductive plate 10 during the electrical inspection, the movable pin 5 is connected to the conductive plate. A short circuit occurs with the terminal pin 11 for measurement, and this is measured by the tester unit 14 to automatically detect an operation failure of the movable pin 5 for connecting the substrate. Therefore, damage to the flexible printed circuit board 2 due to the malfunction of the board connecting movable pin 5 can be detected at an early stage.

  In the present invention, the changeover switch portion 13 is provided between the conductive plate connecting terminal pin 11 and the plurality of substrate connecting terminals 5, 5... 5, and is electrically connected to the conductive plate connecting terminal pin 11. By sequentially switching the points A to F corresponding to the movable pins 5, 5... 5, it is possible to measure the presence or absence of a short circuit between them. In particular, since shorts or opens of each board connecting movable pin 5 can be individually scanned and measured exceptionally, if there is a specific board connecting movable pin 5 penetrating through the flexible printed circuit board 2, this is quick. Automatic detection can be performed quickly and reliably at each stage.

Therefore, the board manufacturing operation can be stopped immediately and damage to the flexible printed circuit board 2 can be minimized. In this case, by exchanging the penetrating board connecting movable pin 5 with a new one, the abnormal operation state of the pin penetrating can be solved, and the board manufacturing can be continued in a normal state, and the high-quality flexible printed board 2 can be stabilized. Can be mass-produced.

  In the above embodiment, the terminal pin 11 made of the spring type probe is used as the conductive plate connecting terminal portion. However, as shown in FIG. 5, instead of the conductive plate connecting terminal pin 11, it is always connected to the conductive plate 10. The connected conductive plate connection wiring 15 may be used. Further, the type of the changeover switch part is not particularly limited, and for example, a matrix type changeover switch part can be used.

  Also, by providing a plurality of conductive plate connection terminal portions, that is, conductive plate connection terminal pins 11 or conductive plate connection wirings 15, short-circuiting between the conductive plate connection terminal pins 11 or the conductive plate connection wirings 15 can be achieved. By inspecting the presence / absence, it is possible to self-diagnose the malfunction of the conductive plate connecting terminal portion.

  For example, as shown in FIG. 4, when two conductive plate connection terminal pins 11 are provided, even if one of the two conductive plate connection terminal pins 11 malfunctions, the other conductive plate connection terminal 11 Electrical inspection can be performed by the pin 11.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

BRIEF DESCRIPTION OF THE DRAWINGS The principal part sectional drawing which shows one embodiment of this invention and demonstrates the structural example of the pin part of an electrical inspection apparatus. The principal part sectional drawing which shows one embodiment of this invention and demonstrates the other structural example of the pin part of an electrical inspection apparatus. Sectional drawing which shows one Embodiment of this invention and demonstrates the further another structural example of the pin part of an electrical inspection apparatus. The principal part sectional view explaining the example of composition which shows one embodiment of the present invention and provided two terminal pins for conductive plate connection of an electric inspection device. The principal part sectional drawing explaining the example of a structure which showed one Embodiment of this invention and replaced with the conductive plate connection terminal pin of an electrical inspection apparatus, and provided the wiring for conductive plate connection. BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram which shows one embodiment of this invention and demonstrates an electrical inspection apparatus notionally. BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram which shows one Embodiment of this invention, and illustrates notionally the electrical inspection apparatus which provides two conductive plate connection terminal pins. The principal part sectional drawing which shows a prior art example and demonstrates the structural example of the movable pin part of an electrical inspection apparatus. The whole block diagram which shows a prior art example and illustrates an electrical inspection apparatus notionally. The principal part sectional drawing which shows the set state of the movable pin for board | substrate connection. FIG. 11 is a cross-sectional view of a main part showing a state in which the base on the electrical check in FIG. 10 is lowered and the flexible printed board is pressed against the positioning guide plate. FIG. 11 is an essential part cross-sectional view showing a state during normal operation of the substrate connecting movable pin of FIG. 10; FIG. 11 is an essential part cross-sectional view showing a state during abnormal operation of the substrate connecting movable pin of FIG. 10;

Explanation of symbols

1 Base on electrical check (pressing means)
2 Flexible Printed Circuit Board 3 Positioning Guide Plate 4 Pin Board 5 Movable Pin for Connecting Board (Spring Type Probe)
6 Through hole
7 Changeover switch section 8 Tester section (measurement section)
10 conductive plate 11 conductive plate connection terminal pin (conductive plate connection terminal, spring type probe)
12 Through hole 13 Changeover switch part 14 Tester part (measurement part)
15 Conductive plate connection wiring (conductive plate connection terminal)

Claims (4)

In the electric inspection apparatus in which the movable pin for connecting the substrate that can come into contact with the land portion of the flexible printed circuit board is formed by a spring-type probe that is shortened and extended according to the presence or absence of a pressure load,
A conductive plate is disposed on the surface of the flexible printed board opposite to the surface on which the movable pins for connecting the substrate abut, and the space between the conductive plate end and the flexible printed circuit board or A conductive plate connection terminal portion that is electrically connected to the conductive plate is provided at a location of the through hole opened in the flexible printed circuit board, and the conductive plate connection terminal portion and the movable pin for substrate connection are provided. An electrical inspection apparatus for a flexible printed circuit board, which is configured to detect that the movable pin for connecting the board has penetrated the flexible printed circuit board by measuring a short circuit occurring therebetween. .   2. The flexible printed circuit board electrical inspection apparatus according to claim 1, wherein a plurality of the conductive plate connection terminal portions are provided. In the electrical inspection method in which the movable pin for connecting the substrate that can come into contact with the land portion of the flexible printed circuit board is formed by a spring-type probe that is shortened and extended depending on the presence or absence of a pressure load,
A space between the end of the conductive plate and the flexible printed circuit board or a space between the flexible printed circuit board and a conductive plate disposed on a surface opposite to a surface on which the movable pin for connecting the substrate contacts the flexible printed circuit. After electrically connecting the conductive plate connecting terminal portion provided at the location of the through hole opened in the flexible printed board, the board connecting movable pin is brought into contact with the land portion of the flexible printed board, It is detected that the movable pin for connecting the substrate has penetrated the flexible printed circuit board by measuring a short circuit generated between the movable pin for connecting the substrate and the terminal portion for connecting the conductive plate. Electrical inspection method for flexible printed circuit board.   A short circuit that occurs between the conductive plate connection terminal portion and each substrate connection movable pin by individually switching the electrical connection between the conductive plate connection terminal portion connected to the conductive plate and the plurality of substrate connection movable pins. 4. The electrical inspection method for a flexible printed circuit board according to claim 3, wherein the board connecting movable pin penetrating the flexible printed circuit board is detected and specified by measuring the presence or absence of each of the printed circuit boards.

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