TW201403077A - Termination discriminant method and termination discriminant device of built-in substrate - Google Patents

Abstract

To provide a terminal discrimination device for built-in substrates that is capable of identifying the terminal type of an electronic component embedded in a built-in substrate. For every terminal pair combination of a plurality of terminals T1 to T6 of an electronic component 8 embedded in a built-in substrate 7, a current is supplied at various levels while switching the current between a forward and a reverse supply direction between the terminals, and the potential difference between the terminals when the current is supplied is detected as a detected potential value for each of the two supply directions and for each current supply level. Furthermore, based on the detection results, among the plurality of terminals of the electronic component 8, terminals for which the detected potential difference with another terminal in one of the two supply directions is less than a predetermined reference potential difference value with respect to all other terminals and all current supply levels, and for which the rate of change between the detected potential difference when the current is at the minimum current supply level and the detected potential difference when the current is at the maximum current supply level is less than a predetermined reference rate of change, are identified as power supply terminals.

Description

Terminal discriminating method and terminal discriminating device for electronic components provided in a substrate

The present invention relates to a terminal discriminating method and a terminal discriminating device for an electronic component provided in a substrate, which discriminates a terminal type of the electronic component, and the electronic component is disposed in the inner component substrate and on the inner component substrate The wiring patterns are connected and have a plurality of terminals classified into a plurality of types.

At present, an internal component substrate (also referred to as an embedded substrate) in which electronic components such as capacitors, resistors, and ICs are provided has been popularized, and it is urgent to establish an inspection method for electronic components provided in such a built-in component substrate. .

For example, in the case of an electronic component having a plurality of terminals classified into a plurality of types, such as an IC (Integrated Circuit), the electrical characteristics and the contents to be inspected are based on the types of terminals (for example, power sources and signals). Classes, etc.) are different. Therefore, when such an electronic component having a plurality of types of terminals is provided, it is necessary to determine which of the terminals of the electronic component is connected to the wiring pattern of the built-in component substrate, and to check the inspection condition, the inspection content, and the like.

However, the substrate manufacturer who manufactures the component substrate sometimes needs to perform the manufacture of the substrate and the inspection of the substrate without knowing the information on the type of each terminal of the electronic component to be provided on the substrate. In this case, since the electronic parts set in the internal component substrate are not clear Since the type of each terminal is the same, there is a problem that the electronic component and the wiring pattern connected to the electronic component cannot be properly inspected.

In addition, since the built-in component substrate itself is a new product, there is no existing technology that can be called a conventional technique for such an inspection method. The prior art document related to the inspection technique for the built-in component substrate in which the electronic component is provided includes, for example, the technique described in Patent Document 1.

[Previous Technical Literature]

[Patent Literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-309814

Therefore, the problem to be solved by the present invention is to provide a terminal discriminating method and terminal discriminating device for an electronic component provided in a substrate, which discriminates the type of the terminal of the electronic component, and the electronic component is disposed in the internal component substrate, and The wiring patterns provided on the internal component substrate are connected and have a plurality of terminals classified into a plurality of types.

In order to solve the above problems, a first aspect of the present invention is an electronic component terminal discriminating method provided in a substrate, which is provided in a built-in component substrate and connected to a wiring pattern provided on the internal component substrate and has The type of the terminal of the electronic component classified into a plurality of types of terminals is determined, and the method includes a terminal characteristic detecting step for all combinations of terminal pairs of the plurality of terminals of the electronic component. The current is switched between the terminals in the forward and reverse directions, and is changed to a plurality of current supply levels, and the current is supplied via the wiring pattern, for each of the two supply directions and the current supply level. Each of the terminals detects a potential difference between the terminals when the current is supplied as a detected potential difference value, and a terminal determining step of satisfying the plurality of the plurality of terminals of the electronic component based on the detection result of the terminal characteristic detecting step The terminal of the condition is discriminated as a power supply type terminal for power supply input or grounding, and the above conditions are: Between any two of the above sub-feeding directions The detection potential difference in one direction is the same as the detection potential difference at the current supply level when all the terminals and all the current supply levels have not reached the predetermined reference potential difference, and the current is at the maximum current supply level. The degree of change between the detected potential differences does not reach the specified reference degree of change.

According to a second aspect of the present invention, in the terminal determining method of the electronic component provided in the substrate of the first aspect, in the terminal determining step, the terminal of the power source terminal is determined. When the terminal is set to the positive side and the current is supplied, the terminal whose detection potential difference between the terminal and all other terminals is greater than or equal to the predetermined reference potential difference is determined as the power input terminal, and is determined to be the power source. Among the above-mentioned terminals of the terminal, when the terminal is set to the negative side and the current is supplied, the terminal whose detection potential difference between the terminal and all other terminals is greater than or equal to the predetermined reference potential difference is determined as the ground terminal.

According to a third aspect of the present invention, in the terminal determining method of the electronic component provided in the substrate of the second aspect, in the terminal determining step, the plurality of terminals of the electronic component are discriminated A terminal other than the terminal of the power source terminal is discriminated as a signal type terminal for signal input or signal output.

According to a fourth aspect of the present invention, in the terminal determining method of the electronic component provided in the substrate of the third aspect, in the terminal determining step, the terminal determined to be the power input terminal is set to At the negative electrode side, the magnitude relationship between the detection potential difference values corresponding to any one of the current supply levels between the terminals of the signal terminals and the terminals determined to be the power input terminals is determined as When the terminal of the ground terminal is set to the positive electrode side, the detection potential difference value corresponding to any one of the current supply levels between each of the terminals determined to be the signal type terminal and the terminal determined to be the ground terminal The magnitude relationship determines whether the terminal judged to be the signal type terminal is a signal input terminal or a signal output terminal.

Further, a fifth aspect of the present invention is a terminal discriminating device for an electronic component provided in a substrate, which is provided in a built-in component substrate and connected to a wiring pattern provided on the component substrate. The type of the terminal having the electronic component classified into a plurality of types of terminals is determined, and the apparatus includes a plurality of probes that are in contact with the inspection points provided on the wiring pattern of the built-in component substrate a power supply unit that supplies a current between the terminals of the electronic component at a plurality of current supply levels via the probe and the wiring pattern; and detects a potential difference between the terminals of the electronic component via the probe and the wiring pattern a potential difference detecting unit; a connection switching unit that switches an electrical connection relationship between the probe and the power supply unit and the potential difference detecting unit; and controls the power supply unit and the connection switching unit, and the potential difference detecting unit The control unit that determines the type of the terminal of the electronic component, wherein the control unit performs terminal characteristic detection processing and terminal determination processing, wherein the terminal characteristic detection processing controls the connection switching unit and the power supply unit , for all the terminal pairs of the above plurality of terminals of the above electronic component The current is switched between the terminals in the forward and reverse directions, and is changed to a plurality of current supply levels, and the current is applied via the wiring pattern, and the potential difference detecting unit is used for each of the two supply directions. Each of the current supply levels detects a potential difference between the terminals when the supply of the current is detected as a detected potential difference; and the terminal determining process performs the above-described plurality of electronic components based on the detection result in the terminal characteristic detecting process. Among the terminals, the terminal that satisfies the following conditions is determined to be a power source terminal for power supply input or grounding, and the condition is that the detected potential difference value between the other terminals in either of the above two supply directions is The change between the detection potential difference at the above-mentioned current supply level and the detection potential difference at the current supply level at which the current is the maximum at which all the terminals and all the current supply levels do not reach the predetermined reference potential difference and the current is the smallest. The degree does not reach the specified baseline change.

According to the terminal identification method of the electronic component provided in the substrate according to the first aspect of the present invention, even if the type of each terminal of the electronic component provided in the component substrate is not known, it can be determined that the terminal is provided. A power supply type terminal for power supply input or grounding among a plurality of terminals of the electronic component in the component substrate.

According to the terminal identification method of the electronic component provided in the substrate according to the second aspect of the present invention, even if the type of each terminal of the electronic component provided in the component substrate is not known, it can be determined that it is provided. a power source terminal among a plurality of terminals of the electronic component in the component substrate, and It can be determined whether the power source terminal is a power input terminal or a ground terminal.

According to the third aspect of the present invention, the method for determining the terminal of the electronic component provided in the substrate can be determined even if the type of each terminal of the electronic component provided in the component substrate is not known. Among the plurality of terminals of the electronic component in the component substrate, a signal type terminal for signal input or signal output is provided.

According to the fourth aspect of the present invention, the method for determining the terminal of the electronic component provided in the substrate can be determined even if the type of each terminal of the electronic component provided in the component substrate is not known. A signal type terminal among the plurality of terminals of the electronic component in the component substrate is provided, and it can be determined whether the signal type terminal is a signal input terminal or a signal output terminal.

According to the terminal discriminating device for an electronic component provided in the substrate according to the fifth aspect of the present invention, substantially the same effect as the terminal discriminating method of the electronic component provided in the substrate in the first aspect can be obtained.

1‧‧‧Substrate inspection device

2‧‧‧Connection Switching Department

3‧‧‧Power Supply Department

3a‧‧‧First output terminal

3b‧‧‧second output terminal

4‧‧‧ Potential Difference Detection Department

5‧‧‧ Current Detection Department

6‧‧‧Control Department

7‧‧‧ Built-in parts substrate

8‧‧‧Electronic parts

D1~D14‧‧‧ checkpoint

N1~N10‧‧‧ wiring pattern

P1~P14‧‧‧ probe

T1~T6‧‧‧ terminal

SW1, SW2‧‧‧ switching components

SWG1~SWG14‧‧‧ switch group

S1~S4‧‧‧ steps

1 is a view showing an electrical configuration of a substrate inspecting apparatus to which a terminal discriminating method for an electronic component provided in a substrate according to an embodiment of the present invention is applied.

FIG. 2 is a view schematically showing a configuration of an internal component substrate to be inspected.

3 is a view in which an electronic component provided in the internal component substrate of FIG. 2 and a wiring pattern connected to a terminal of the electronic component are extracted and shown.

Fig. 4 is a view showing an operational procedure of the substrate inspecting apparatus shown in Fig. 1;

FIG. 5 is a view showing the detection result of step S1 of FIG. 4 in a table.

A substrate inspection apparatus to which a terminal determination method for an electronic component provided in a substrate according to an embodiment of the present invention is applied will be described with reference to FIG. 1 to FIG. As shown in Figure 1, the substrate inspection The device 1 includes an inspection jig (not shown) having a plurality of probes P1 to P14 (indicated by the symbol "P" in the collective name), a connection switching unit 2, a power supply unit 3, a potential difference detecting unit 4, and a current detecting unit 5, and The control unit 6 inspects the electrical characteristics of the wiring pattern provided on the internal component substrate (hereinafter referred to as "substrate") 7 shown in FIG. 2 and the electronic component 8 provided in the substrate 7. In the present embodiment, the case where the IC is provided in the substrate 7 as the electronic component 8 has been described as an example. However, the present invention is not limited to the IC, and may be classified into a plurality of power sources and signals. The technology of the present embodiment can be applied to the electronic components of the terminal types. In the present embodiment, the two-terminal method in which the power supply probe and the potential difference detecting probe are shared is used in the potential difference detection for determining the terminal of the electronic component 8 or the like. A four-terminal method for detecting a potential difference by a power supply probe and a potential difference detecting probe.

The substrate 7 is formed by laminating a plurality of substrates, and an electronic component (IC having a plurality of terminals T1 to T6 classified as a plurality of types (in the case of collective use, the symbol "T" is used) is provided in the inside. 8), and a plurality of wiring patterns N1 to N10 are provided (the symbol "N" is used in the case of collectively). As shown in FIG. 3, the wiring patterns N1 to N6 in the wiring patterns N1 to N10 are connected to the terminals T1 to T6 of the electronic component 8. Further, on the upper surface and the lower surface of the substrate 7, a plurality of inspection points D1 to D15 (refer to the symbol "D" in the case of collective use) which can be in contact with the probe P of the substrate inspection apparatus 1 are provided. For example, a land portion, a solder bump, or the like provided on the wiring patterns N1 to N10 can be used as the inspection points D1 to D15. The relationship between each of the inspection points D1 to D15 and the wiring patterns N1 to N10 is as shown in FIG. 2 .

Returning to the configuration of FIG. 1, the inspection jig includes: an upper inspection jig having probes P1 to P3, P7 to P10 which can be in contact with inspection points D1 to D3 and D7 to D10 on the upper surface of the substrate 7, and a lower inspection The jig has probes P4 to P6 and P11 to P14 which are in contact with the inspection points D4 to D6 and D11 to D14 on the lower surface of the substrate 7. At the time of inspection, the probes P1 to P3 and P7 to P10 of the upper inspection jig and the probes P4 to P6 and P11 to P14 of the lower inspection jig are in contact with the corresponding inspection points D1 to D14 of the substrate 7.

The connection switching unit 2 is configured to include the switch groups SWG1 to SWG14 provided on each of the probes P, and to switch the first and the first probes P and the power supply unit 3 by the control of the control unit 6. The electrical connection relationship between the two output terminals 3a and 3b, the potential difference detecting unit 4, and the current detecting unit 5. Each of the switch groups SWG1 to SWG14 includes two switching elements (for example, semiconductor switching elements) SW1 and SW2 that are turned on and off by the control unit 6. In the case where the switching element SW1 is turned on, the corresponding probe P is connected to the first output terminal 3a of the power supply unit 3 via the switching element SW1. When the switching element SW2 is turned on, the corresponding probe P is connected to the second output terminal 3b of the power supply unit 3 via the switching element SW2.

The power supply unit 3 outputs inspection power for inspection by the control of the control unit 6, and has paired first and second output terminals 3a and 3b that output inspection power. The power supply unit 3 can switch and output a DC stabilized current and a DC stabilized voltage as the inspection power, and can switch the supply current level and the supply voltage level of the current value supplied to the inspection target in a plurality of stages. Further, the power supply unit 3 may output an alternating current (for example, an alternating current stable current), an alternating current voltage (for example, an alternating current stable voltage), a direct current fluctuation current whose output current value changes periodically, or an output voltage value, depending on the inspection content. A cyclically varying DC voltage that varies. Further, when the inspection power outputted from the power supply unit 3 has a polarity, the first output terminal 3a can be set to the positive electrode side, and the second output terminal 3b can be set to the negative electrode side.

The potential difference detecting unit 4 detects a potential difference applied between the inspection points D of the substrate 7 by the power supply unit 3 via the probe P, and supplies the detection result to the control unit 6.

The current detecting unit 5 is inserted into the wiring from the first output terminal 3a or the second output terminal 3b (the second output terminal 3b in the present embodiment) of the power supply unit 3 via the connection switching unit 2 toward the probe P. The current supplied to the electronic component to be inspected by the power supply unit 3 via the probe P is detected, and the detection result is supplied to the control unit 6.

The control unit 6 performs control of the substrate inspection device 1 , processing for determining the respective terminals T of the electronic component 8 , and inspection processing for the wiring pattern N of the substrate 7 and the electronic component 8 . The details of the processing for determining the terminal T and the inspection processing performed by the control unit 6 will be described in detail below with reference to FIGS. 4 and 5 .

As shown in FIG. 4, in the present embodiment, before the inspection process is performed in step S4, preparation processing for inspection is performed in steps S1 to S3. The preparation process of the steps S1 to S3 is for determining the type of each terminal T of the electronic component 8 provided in the substrate 7, and determining the inspection contents and inspection conditions of the wiring pattern N and the electronic component 8 provided on the substrate 7. Wait. In the case of inspecting a plurality of substrates 7 of the same kind, the preparation processing of steps S1 to S3 may be performed only at the time of inspection for the first substrate 7, and at the time of inspection for the second or subsequent substrate 7. Can be omitted.

In step S1, the characteristics of the respective terminals T of the electronic component 8 are detected. Specifically, for all combinations of the two terminals T selected from the terminals T of the electronic component 8, a current for detecting the terminal characteristics between the selected terminals T is supplied from the power supply unit 3, and the potential difference detecting portion 4 is passed through the potential difference detecting portion 4 via The probes P1 to P6, the inspection points D1 to D6, and the wiring patterns N1 to N6 detect the potential difference between the selected terminals T. At this time, for each of the selected terminal T pairs, the supply direction of the current is switched between the positive and negative supply directions, and the supplied current value is changed to a plurality of current supply levels (in the present embodiment, the first With the second two current supply levels). That is, the detection of the potential difference between the selected two terminals T is performed for each combination of all the combinations of the two supply directions of the current and the plurality of current supply levels. Further, in the present embodiment, the first current supply level of the current supplied for terminal characteristic detection is set to, for example, 0.2 mA, and the second current supply level is set to, for example, 1 mA.

In the terminal characteristic detecting step, although the combined replacement items are the replacement of the terminal T pair, the replacement of the positive and negative directions of the current supply direction, and the replacement of the two stages of the supply current level, for the three items, The order in which the items are replaced is arbitrary. For example, it can be performed in such a manner that the current supply direction is set to the forward direction for the selected terminal T pair, and the current supply direction is switched to the reverse direction after the current supply level is switched in two stages and the current is supplied. The current supply level is switched again and the current is supplied in two stages. Then, the next terminal T pair is selected, and the current for terminal characteristic detection is provided in the same manner for the selected terminal T pair, and at the end, the next terminal pair is selected.

Further, in the present embodiment, in order to prevent application on the terminal T at the time of terminal characteristic detection Excessive potential difference causes an excessive load to be applied to the electronic component 8, and the control unit 6 is provided with a protection function. For example, when the current for detecting the terminal characteristic is supplied from the power supply unit 3 to the selected pair of terminals T, the potential difference detecting unit 4 monitors the potential difference between the pair of terminals T, and the potential difference between the pair of terminals T reaches the predetermined value. When the upper limit potential difference (3 V in the present embodiment) is exceeded, the supply of current to the power supply unit 3 is stopped.

The potential difference detected for the combination of each terminal T pair is summarized in the table as shown in FIG. In the table of FIG. 5, in the first row from the top, the symbol of the terminal T which is set to the positive electrode side at the time of current supply is written, and in the first column from the left, it is recorded that the current supply is set. It is the symbol of the terminal T on the negative side. In the other fields, the terminals T1 to T6 in the first row of the vertical upper side of the field are set as the positive side, and the terminal in the first column of the horizontal left side of the field is recorded. The two detection potential differences corresponding to the two current supply levels when T1 to T6 are set to the negative side. The value on the left side of the oblique dividing line is the detected potential difference when the current of the first current supply level (0.2 mA) is supplied, and the value on the right side of the oblique dividing line is the detected potential difference when the current is supplied to the second current supply level (1 mA). . The unit of the detection potential difference recorded in each field is V.

For example, in the field G1 of the table of FIG. 5, two detection potential differences corresponding to the first and second supply current levels when the terminal T4 is set to the positive side and the terminal T1 is set to the negative side are recorded. a value in which 0.5 (V) is a detected potential difference when a current of a first current supply level (0.2 mA) is supplied, and 0.6 (V) is a detected potential difference when a current of a second current supply level (1 mA) is supplied . Further, as indicated by the field G2, the place where the detection voltage value of 3 (V) is written indicates that the potential difference applied between the terminals T is restricted by the protection function of the control unit 6.

Next, in step S2, the type of each terminal T of the electronic component 8 is discriminated based on the detection result of step S1. Specifically, among the plurality of terminals T of the electronic component 8 , the terminal that satisfies the following condition is determined as a power source terminal for power supply input or grounding, in the case where the two terminals are in the two supply directions. The detection potential difference in either direction is the current supply level at which the current reference level difference is not reached for all other terminals and all current supply levels, and the current supply level is the smallest (in the present embodiment, the first current supply level) Detection potential difference The degree of change between the detected potential difference values when the current is at the maximum current supply level (the second current supply level in the present embodiment) does not reach a predetermined reference degree of change. In other words, in the discriminating step, the terminal T having the polarity characteristic of the diode is detected from the plurality of terminals T and the electrical characteristics between all the other terminals T, and the terminal T is discriminated as a power source. Class terminal.

The predetermined reference potential difference value is set to, for example, 3V. Further, regarding the degree of change between the detected potential difference when the supply current supplied between the terminals T is the first current supply level and the detected potential difference when the supply current is the second current supply level, two detected potential difference values are used. Difference or ratio (division value), etc. In the present embodiment, the difference between the two detected potential differences is used as the degree of change of the two detected potential differences, and when the difference is smaller than the predetermined reference change difference (for example, 0.15 V), the power supply type terminal is discriminated . In the case of the detection result of FIG. 5, the terminals T3 and T4 are discriminated as power supply type terminals as indicated by the circled areas A1 and A2.

Further, in this step S2, it is determined whether the terminals T3 and T4 determined as the power source terminals are the power supply input terminal or the ground terminal. Specifically, when the terminals T3 and T4 are set to the positive electrode side and the current for terminal determination is supplied, the difference between the detection potentials of the terminals T3 and T4 and all the other terminals T1 to T6 is greater than or equal to the predetermined reference. The terminal of the potential difference is determined as the power input terminal. When the terminals T3 and T4 are set to the negative side and the current for terminal identification is supplied, the difference between the detection potentials of the terminals T3 and T4 and all other terminals T1 to T6 is greater than A terminal equal to or equal to the predetermined reference potential difference is determined to be a ground terminal. In the case of the detection result of FIG. 5, as shown in the circled areas A3 and A4, the terminal T3 is determined as the power supply input terminal, and the terminal T4 is determined as the ground terminal.

In other words, in the determination step, when the terminals T3 and T4 that are determined to be the power source terminals are set to the positive side and supplied with current to the other terminals T1 to T6, they are connected to the other terminals T1 to T6. A terminal that does not detect the forward direction characteristic of the diode is determined as a power input terminal. In addition, when the terminals T3 and T4 that are determined to be the power source terminals are set to the negative side and the current is supplied to the other terminals T1 to T6, the diode forward characteristics are not detected between the other terminals T1 and T6. The terminal is judged to be a ground terminal.

Further, in this step S2, the terminals T1, T2, T5, and T6 other than the terminals T3 and T4 which are determined to be power source terminals among the plurality of terminals T of the electronic component 8 are discriminated as signal input or signals. The output signal type terminal determines whether the terminals T1, T2, T5, and T6 are signal input terminals or signal output terminals.

Specifically, as the first determination method, the first or second current supply bit between each of the terminals T1, T2, T5, T6 and the terminal T3 when the terminal T3 of the power supply input terminal is determined to be set to the negative side It is determined whether the terminals T1, T2, T5, and T6 are signal input terminals or signal output terminals due to the magnitude relationship of the corresponding detection potential difference values. Alternatively, as the second discriminating method, the first or second current supply level between the respective terminals T1, T2, T5, T6 and the terminal T4 is determined according to the terminal T4 determined to be the ground terminal being set to the positive side. Check the magnitude relationship of the potential difference to determine whether the terminals T1, T2, T5, and T6 are signal input terminals or signal output terminals. In addition, any one of the first or second discriminating methods may be employed, or in each discriminating method, a detected potential difference corresponding to the first current supply level and a second current supply level may be used. The magnitude relationship of any one of the potential difference values is detected to determine. Here, the method of determining the input side or the output side of the signal type terminal is that the forward voltage using the diode characteristic between the signal type terminal and the power source type terminal is generally such that the input side is smaller than the output side. method.

More specific example of the determination of the input side or the output side of the signal type terminal, for example, in accordance with the first determination method, when the terminal T3 determined as the power supply input terminal is set to the negative side The check potential difference between the terminals T1, T2, T5, T6 and the terminal T3 corresponding to the first or second current supply level is arranged in order from small to large and is divided into two groups at the center thereof, and belongs to the detection. The terminals T1, T2, T5, and T6 of a group having a small potential difference are discriminated as signal input terminals, and the terminals T1, T2, T5, and T6 belonging to one group having a large detection potential difference are discriminated as signal output terminals. Alternatively, in correspondence with the second determination method, the first or second current supply between the terminals T1, T2, T5, T6 and the terminal T4 when the terminal T4 determined to be the ground terminal is set to the positive side The check potential difference corresponding to the level is arranged in order from small to large and is divided into two groups at the center thereof, and the terminals T1, T2, T5, and T6 belonging to a group having a small difference in detection potential are discriminated as signal input terminals, and Belong to the end of a group whose detection potential difference is large The sub-T1, T2, T5, and T6 are discriminated as signal output terminals.

For example, in the case of the inspection result of FIG. 5, in the discrimination by the above-described first discriminating method, as indicated by the circled area A1, the detection corresponding to the first current supply level (0.2 mA) is performed. The potential difference values are arranged in order from small to large, and are the order of the terminal T1, the terminal T2, the terminal T5, and the terminal T6. The terminals T1 and T2 are determined as signal input terminals, and the terminals T5 and T6 are determined as signal output terminals.

Next, in step S3, based on the determination result of the type of each terminal T of the electronic component 8 in step S2, the inspection contents (conduction inspection, insulation inspection, etc.) performed on the electronic component 8 and each wiring pattern N are set and Inspection conditions (for example, polarity when power for inspection is applied, power supply level, etc.).

Next, in step S4, inspection of the electronic component 8 and each wiring pattern N provided in the substrate 7 is performed based on the inspection contents and inspection conditions set in step S3. The inspection at this time includes, for example, an inspection relating to the conductivity of the wiring pattern N and an inspection relating to the insulation of the wiring pattern N. The continuity check of the wiring pattern N also includes a conduction check between the wiring patterns N connected via the electronic component 8 (for example, between the wiring patterns N1 and N4).

In the case of the continuity check, for example, the connection relationship by the connection switching unit 2 is switched in accordance with the wiring pattern N (or between the wiring patterns N connected via the electronic component 8) to be sequentially selected. The power for inspection is supplied from the power supply unit 3 to the wiring pattern N to be inspected via the probe P, and the potential difference detecting unit 4 detects the potential difference applied to each of the wiring patterns N at this time, and the current detecting unit 5 detects that the power is supplied to each. The current of the wiring pattern N is checked for the continuity between the wiring patterns N based on the detected potential difference and the detected current value.

In the case of the insulation inspection, for example, the connection relationship by the connection switching unit 2 is switched in accordance with the two wiring patterns N of the inspection objects to be sequentially selected, and the inspection target is supplied from the power supply unit 3 via the probe P. The electric power for inspection is supplied between the two wiring patterns N, and the utilization is utilized. The current detecting unit 5 detects whether or not there is a current flowing between the two wiring patterns N, and checks the insulation between the wiring patterns N based on the detection result.

As described above, according to the present embodiment, even when the type of each terminal T of the electronic component 8 provided in the substrate 7 is not known, the terminal T of the electronic component 8 provided in the substrate 7 can be automatically Identify the power input terminal, ground terminal, signal input terminal or signal output terminal. Therefore, the inspection of the built-in electronic component 8 and the wiring pattern N connected to the electronic component 8 can be performed appropriately.

8‧‧‧Electronic parts

D1~D6‧‧‧ checkpoint

N1~N6‧‧‧ wiring pattern

T1~T6‧‧‧ terminal

Claims (5)

A terminal discriminating method for an electronic component provided in a substrate, wherein the electronic component is provided in a built-in component substrate and connected to a wiring pattern provided on the component substrate; A method of classifying a plurality of terminals into a plurality of types, the method comprising: a terminal characteristic detecting step of making a current between the terminals for a combination of all terminal pairs of the plurality of terminals of the electronic component Switching in the two supply directions and changing to a plurality of current supply levels, and supplying the current via the wiring pattern, detecting the current supply for each of the two supply directions and each of the current supply levels A potential difference between each of the terminals is used as a power source for determining a potential difference; and a terminal determining step for determining, as a result of the detection result of the terminal characteristic detecting step, a terminal that satisfies the following condition among the plurality of terminals of the electronic component Input or grounded power type terminal, in the direction of either of the two supply directions with other terminals The detection potential difference is the difference between the detection potential difference at the current supply level when all other terminals and all current supply levels do not reach the specified reference potential difference, and the current is at the minimum, and the detection potential difference when the current is at the maximum current supply level. The degree of change between the two does not reach the specified baseline change. The method for discriminating a terminal for an electronic component provided in a substrate according to the first aspect of the invention, wherein in the terminal determining step, the terminal is determined to be a positive electrode side of the terminal of the power source terminal. And the terminal having the detection potential difference between the terminal and all other terminals greater than or equal to the predetermined reference potential difference is determined as the power input terminal when the current is supplied, and is determined in the terminal of the power supply type terminal. When the terminal is set to the negative side and the current is supplied, the terminal whose detection potential difference between the terminal and all other terminals is greater than or equal to the predetermined reference potential difference is determined as the ground terminal. A terminal discriminating method for an electronic component provided in a substrate according to the second aspect of the invention, wherein in the terminal determining step, the plurality of terminals of the electronic component are determined to be the electric The terminals other than the terminals of the source terminal are discriminated as signal terminals for signal input or signal output. The terminal discriminating method of the electronic component provided in the substrate according to the third aspect of the invention, wherein the terminal determining step determines that the terminal is determined to be the negative side when the terminal of the power input terminal is set to the negative electrode side. a magnitude relationship between a detection potential difference corresponding to any one of the current supply levels between the respective terminals of the signal type terminal and a terminal determined to be the power input terminal, or a terminal determined to be the ground terminal is set to In the case of the positive electrode side, the magnitude of the detected potential difference corresponding to any one of the current supply levels between the respective terminals of the signal terminal and the terminal determined to be the ground terminal is determined as Whether the terminal of the signal type terminal is a signal input terminal or a signal output terminal. A terminal discriminating device for an electronic component provided in a substrate, wherein the electronic component is provided in a built-in component substrate and connected to a wiring pattern provided on the component substrate; The device is classified into a plurality of types of terminals, and the device includes a plurality of probes that are in contact with a checkpoint provided on the wiring pattern of the built-in component substrate, and a power supply unit via the probe a current is supplied to the terminal of the electronic component at a plurality of current supply levels with the wiring pattern; the potential difference detecting unit detects a potential difference between the terminals of the electronic component via the probe and the wiring pattern; and connects the switching portion Switching the electrical connection between the probe and the power supply unit and the potential difference detecting unit; and the control unit controls the power supply unit and the connection switching unit, and determines based on the detection result of the potential difference detecting unit a type of the terminal of the electronic component; and the control section performs terminal characteristic detecting processing and terminal discriminating processing, wherein the terminal characteristic detecting By controlling the connection switching unit and the power supply unit, a combination of all terminal pairs of the plurality of terminals of the electronic component switches current between the terminals in two supply directions, and changes to a plurality of currents. Supplying a level and applying the same via the wiring pattern And detecting, by the potential difference detecting unit, a potential difference between each terminal when the current is supplied for each of the two supply directions and the current supply level as a detected potential difference; the terminal discrimination processing is based on As a result of the detection in the terminal characteristic detecting process, the terminal satisfying the following conditions among the plurality of terminals of the electronic component is determined as a power source terminal for power supply input or grounding, and the condition is: between the other terminals The detection potential difference value in any one of the two supply directions is different from the detection potential difference when the current supply level is not the same as the predetermined reference potential difference and all the current supply levels are the minimum The degree of change between the detected potential differences when the current is at the maximum current supply level does not reach a predetermined reference degree of change.