WO2016046917A1 - 電気製品の組み立て工程の管理方法 - Google Patents
電気製品の組み立て工程の管理方法 Download PDFInfo
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- WO2016046917A1 WO2016046917A1 PCT/JP2014/075264 JP2014075264W WO2016046917A1 WO 2016046917 A1 WO2016046917 A1 WO 2016046917A1 JP 2014075264 W JP2014075264 W JP 2014075264W WO 2016046917 A1 WO2016046917 A1 WO 2016046917A1
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- electrical product
- potential difference
- points
- assembly process
- electrical
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000005259 measurement Methods 0.000 claims abstract description 35
- 239000004065 semiconductor Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 48
- 230000003068 static effect Effects 0.000 claims description 47
- 238000007726 management method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 5
- 239000003550 marker Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 56
- 238000010586 diagram Methods 0.000 description 15
- 238000012986 modification Methods 0.000 description 14
- 230000004048 modification Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 13
- 239000011265 semifinished product Substances 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000015654 memory Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41805—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by assembly
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16561—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in hand-held circuit testers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2656—Instrumentation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45031—Manufacturing semiconductor wafers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/08—Monitoring manufacture of assemblages
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/163—Monitoring a manufacturing process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Definitions
- This invention relates to a method for managing an assembly process of an electrical product.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for managing an assembly process of an electrical product that can accurately identify and manage an electrical product affected by electrostatic discharge.
- the present invention is a method for managing an assembly process of an electrical product including at least a substrate on which a semiconductor component is mounted and a power supply circuit, While the assembly of the electrical product is being performed, the potential difference between two points on the electrical line or signal line that is electrically connected across the impedance element inside the electrical product is constantly measured, When a change exceeding a predetermined threshold value that distinguishes between electrostatic discharge noise and a normal potential range occurs in the potential difference between the two points, the measurement data of the potential difference between the two points is recorded, and the electrical product is subjected to electrostatic discharge.
- the electronic product is provided with a label for identifying that it has been affected.
- the electric potential difference between two points on an electrical line or a signal line that is electrically connected across an impedance element inside the electrical product is constantly measured, and a predetermined threshold value is applied while the electrical product is being assembled.
- FIG. 5 is a flowchart for explaining a management method of an assembly process of electrical product 2 in the first embodiment.
- FIG. 10 is a diagram for describing one modification example of the first embodiment.
- FIG. 10 is a diagram for describing one modification example of the first embodiment.
- It is a figure for demonstrating the apparatus structure which concerns on Embodiment 2 of this invention.
- Embodiment 2 it is a figure for demonstrating the electrical connection of the semiconductor component 5 and the static electricity measuring device 9.
- FIG. 5 is a flowchart for explaining a management method of an assembly process of electrical product 2 in the second embodiment.
- FIG. 10 is a diagram for describing one modification example of the second embodiment. In Embodiment 3, it is a figure for demonstrating the example which measures the electrical potential difference between two points on a signal wire
- FIG. 10 is a diagram for describing one modification example of the first embodiment.
- FIG. 10 is a diagram for describing one modification example of the first embodiment.
- FIG. FIG. 1 is a diagram for explaining an apparatus configuration according to Embodiment 1 of the present invention.
- the apparatus shown in FIG. 1 includes a work table 1.
- the electrical product 2 is placed on the work table 1.
- the electrical product 2 includes at least a substrate 3 and a power supply circuit 4.
- the substrate 3 has a semiconductor component 5 mounted thereon.
- the substrate 3 and the power supply circuit 4 are mounted on the electrical product 2 using a tool 6.
- the semiconductor component 5 is electrically connected to the power supply circuit 4 through the substrate 3 by the electric wire 7.
- the electric wire 7 is connected to the static electricity measuring instrument 9 via the terminal 8.
- the static electricity measuring instrument 9 is connected to the computer 10.
- the static electricity measuring instrument 9 While the electrical product 2 is being assembled, the static electricity measuring instrument 9 constantly calculates the potential difference between two points on the electrical wire 7 that are electrically connected across the impedance element (semiconductor component 5) inside the electrical product 2. measure.
- the measurement cycle is preferably 100 ns or less.
- the static electricity measuring instrument 9 stores the measurement data of the potential difference between the two points. 10 to send.
- the above threshold value is an index indicating electrostatic discharge that may affect quality, and is set based on experimental results and simulation results in advance. As an example, when the rated voltage of the semiconductor component is 5.5V, the threshold is set to 7V.
- the computer 10 includes, for example, a memory including a ROM and a RAM, an input / output interface for inputting / outputting various information, and a processor capable of executing various arithmetic processes based on the various information.
- the computer 10 receives and records the measurement data transmitted from the static electricity measuring device 9 and gives a mark to the electric product 2 for identifying that the electric product 2 has been affected by electrostatic discharge. Specifically, the computer 10 adds a sign to the measurement data.
- the computer 10 has a screen as an output interface, and displays measurement data to which a sign is added on the screen. Further, the computer 10 has a communication connector connected to an external device as an output interface, and transmits measurement data to the outside via the communication connector.
- FIG. 2 is a diagram for explaining electrical connection between the semiconductor component 5 and the static electricity measuring instrument 9 in the first embodiment.
- the electric wire 7 shown in FIG. 1 includes the two electric wires 71 and 72 shown in FIG.
- the two electric wires 71 and 72 connect the power supply circuit 4 (power supply device in FIG. 2) and the semiconductor component 5.
- the static electricity measuring instrument 9 is connected to one point on the electric wire 71 and one point on the electric wire 72.
- the static electricity measuring device 9 measures a potential difference between the two electric wires 71 and 72.
- FIG. 3 is a flowchart for explaining a management method of the assembly process of electrical product 2 in the first embodiment.
- the routine shown in FIG. 3 is executed every time assembly of the electric product 2 is started.
- step S101 the operator connects the electric wire 7 and the static electricity measuring instrument 9. Specifically, the worker connects the two electric wires 71 and 72 to the static electricity measuring instrument 9.
- the worker is not limited to a person, but may be mechanical equipment having a robot arm or the like.
- step S102 the operator determines whether or not the assembly process of the electrical product 2 has been completed. If the assembly process has not been completed, the process of step S103 is executed.
- step S103 the static electricity measuring instrument 9 measures a potential difference between the two electric wires 71 and 72.
- step S104 the static electricity measuring device 9 determines whether or not the potential difference measured in step S103 is smaller than a threshold value.
- the threshold value is a predetermined value for distinguishing between electrostatic discharge noise and a normal potential range, and is set in advance.
- step S104 determines whether electrostatic discharge that affects the quality of the electrical product 2 has occurred, and the process continues from step S102. If it is determined in step S102 that the assembly process of the electrical product 2 has been completed, this routine ends.
- step S104 If the determination condition in step S104 is not satisfied, the potential difference measurement data measured in step S103 is recorded in the computer 10 (step S105). Specifically, the static electricity measuring device 9 transmits measurement data to the computer 10, and the computer 10 stores the received measurement data.
- step S106 the computer 10 gives a mark to the measurement data.
- the sign is a sign for identifying that the electric product 2 is affected by electrostatic discharge.
- step S107 the computer 10 displays the measurement data with the mark on the screen.
- the computer 10 transmits measurement data to the outside via a communication connector.
- step S108 the operator removes the semi-finished product in which electrostatic discharge that may affect the quality has occurred. After the process of step S108, this routine is terminated.
- the potential difference between two points on the electrical wire 7 that are electrically connected across the impedance element inside the electrical product is always set. While measuring and assembling the electrical product, it is possible to accurately identify the electrical product affected by electrostatic discharge by monitoring the potential difference between the two points for a change that exceeds a predetermined threshold. Can be managed.
- the method for managing an assembly process of an electrical product according to the first embodiment when an electrostatic discharge that may affect quality occurs in a semi-finished product that is being manufactured, the semi-finished product that is being assembled is immediately removed. You can also.
- FIG. 4 is a diagram for explaining one modification of the first embodiment.
- the configuration of FIG. 4 is the same as the configuration of FIG. 2 except that the connectors 71a and 72b are provided.
- the connector 71a is connected to one point on the electric wire 71
- the connector 72b is connected to one point on the electric wire 72.
- the static electricity measuring instrument 9 is connected to the connectors 71a and 72b. Since the connectors 71a and 72b for measuring the potential difference are prepared in advance at two points which are measurement points, the attachment of the electrostatic measuring device 9 is facilitated, and the management efficiency of the assembly process of the electric product 2 is increased.
- FIG. 5 is a diagram for explaining one modification of the first embodiment.
- the configuration of FIG. 5 is the same as the configuration of FIG. 1 except that the static electricity measuring instrument 9 has a wireless communication function for transmitting measurement data and a wireless communication device 11 is added.
- the wireless communication device 11 receives the measurement data transmitted by the static electricity measuring device 9 and transmits it to the computer 10.
- the structure which carries out the wireless connection of the static electricity measuring device 9 and the computer 10 may be sufficient.
- FIG. 11 is a diagram for explaining one modification of the first embodiment.
- a static electricity measuring device 9 is provided for each work table, and each static electricity measuring device 9 is connected to a common wired transmitter 12.
- the wired transmitter 12 is connected to the computer 10.
- Each static electricity measuring device 9 transmits measurement data to the computer 10 via the wired transmitter 12.
- a configuration in which a plurality of static electricity measuring devices 9 and one computer 10 are connected by wire may be employed. This also applies to the following embodiments.
- FIG. 12 is a diagram for explaining one modification of the first embodiment.
- a static electricity measuring device 9 is provided for each work table, and each static electricity measuring device 9 has a wireless communication function.
- the wireless communication device 13 receives the measurement data transmitted by each static electricity measuring device 9 and transmits it to the computer 10.
- the structure which wirelessly connects the some static electricity measuring device 9 and the one computer 10 may be sufficient. This also applies to the following embodiments.
- Embodiment 2 a second embodiment of the present invention will be described with reference to FIGS.
- the potential difference between two points on the electrical line that is electrically connected across the impedance element (semiconductor component) is measured, and therefore, on the electrical line 7 between the power supply circuit 4 and the semiconductor component 5.
- the potential difference between the two points is measured.
- the measurement location of the potential difference is not limited to this.
- the potential difference between the outlet terminals of the power supply circuit 4 is measured.
- FIG. 6 is a diagram for explaining a device configuration according to Embodiment 2 of the present invention.
- the apparatus shown in FIG. 6 includes a work table 1.
- the electrical product 2 is placed on the work table 1.
- the electrical product 2 includes at least a substrate 3 and a power supply circuit 4.
- the substrate 3 has a semiconductor component 5 mounted thereon.
- the substrate 3 and the power supply circuit 4 are mounted on the electrical product 2 using a tool 6.
- the power supply circuit 4 and the semiconductor component 5 are electrically connected by an electric wire 7 through the substrate 3.
- the electric wire 7 is electrically connected to the electric wire 20 in the power supply circuit 4.
- the electric wire 20 has an outlet 21.
- the outlet 21 is connected to the terminal 8. Therefore, the electric wire 20 is connected to the static electricity measuring instrument 9 through the terminal 8.
- the static electricity measuring instrument 9 is connected to the computer 10.
- the static electricity measuring instrument 9 While the electrical product 2 is being assembled, the static electricity measuring instrument 9 always detects the potential difference between two points on the electrical wire 20 that are electrically connected across the impedance element (semiconductor component 5) inside the electrical product 2. measure.
- the measurement cycle is preferably 100 ns or less.
- the static electricity measuring instrument 9 stores the measurement data of the potential difference between the two points. 10 to send.
- the above threshold value is an index indicating electrostatic discharge that may affect quality, and is set based on experimental results and simulation results in advance.
- FIG. 7 is a diagram for explaining electrical connection between the semiconductor component 5 and the static electricity measuring instrument 9 in the second embodiment.
- the electric wire 20 shown in FIG. 6 includes two electric wires 73 and 74 shown in FIG.
- the two electric wires 73 and 74 connect the power supply circuit 4 and the outlet 21 thereof.
- the static electricity measuring instrument 9 is connected to one point on the electric wire 73 and one point on the electric wire 74.
- the static electricity measuring device 9 measures a potential difference between the two electric wires 73 and 74.
- FIG. 8 is a flowchart for explaining a management method of the assembly process of electrical product 2 in the second embodiment.
- the routine shown in FIG. 8 is executed every time the electrical product 2 is assembled.
- This routine is the same as the routine shown in FIG. 3 except that step S101 is replaced with step S201, step S103 is replaced with step S203, and step S104 is replaced with step S204.
- step S101 is replaced with step S201
- step S103 is replaced with step S203
- step S104 is replaced with step S204.
- FIG. 8 the same steps as those shown in FIG.
- step S201 the operator connects the electric wire 20 and the static electricity measuring instrument 9. Specifically, the worker connects the two electric wires 73 and 74 to the static electricity measuring instrument 9.
- the worker is not limited to a person, but may be mechanical equipment having a robot arm or the like.
- step S102 the operator determines whether or not the assembly process of the electrical product 2 has been completed. If the assembly process has not been completed, the process of step S203 is executed.
- step S203 the static electricity measuring instrument 9 measures the potential difference between the two electric wires 73 and 74.
- step S204 the static electricity measuring device 9 determines whether or not the potential difference measured in step S203 is smaller than a threshold value.
- the threshold is a predetermined value for distinguishing between electrostatic discharge noise and a normal potential range, and is set in advance.
- step S204 determines whether electrostatic discharge that affects the quality of the electrical product 2 has occurred, and the process continues from step S102. If it is determined in step S102 that the assembly process of the electrical product 2 has been completed, this routine ends.
- step S105 the measurement data of the potential difference measured in step S203 is recorded (step S105). Specifically, the static electricity measuring device 9 transmits measurement data to the computer 10, and the computer 10 stores the received measurement data.
- step S106 the computer 10 adds a sign to the sign data.
- the sign is a sign for identifying that the electric product 2 is affected by electrostatic discharge.
- step S107 the computer 10 displays the measurement data with the mark on the screen.
- the computer 10 transmits measurement data to the outside via a communication connector.
- step S108 the operator removes the semi-finished product in which electrostatic discharge that may affect the quality has occurred. After the process of step S108, this routine is terminated.
- the potential difference between two points on the electrical wire 20 that are electrically connected across the impedance element inside the electrical product is always set. While measuring and assembling the electrical product, it is possible to accurately identify the electrical product affected by electrostatic discharge by monitoring the potential difference between the two points for a change that exceeds a predetermined threshold. Can be managed.
- the method for managing an assembly process of an electrical product according to the second embodiment when an electrostatic discharge that may affect quality occurs in a semi-finished product that is being manufactured, the semi-finished product that is being assembled is immediately removed. You can also.
- FIG. 9 is a diagram for explaining one modification of the second embodiment.
- the configuration of FIG. 9 is the same as the configuration of FIG. 6 except that the static electricity measuring instrument 9 has a wireless communication function for transmitting measurement data and a wireless communication device 11 is added.
- the wireless communication device 11 receives the measurement data transmitted by the static electricity measuring device 9 and transmits it to the computer 10. In this manner, the static electricity measuring instrument 9 and the computer 10 may be wirelessly connected.
- Embodiment 3 the potential difference between two points on the electric wire is measured.
- the potential difference between two points on the signal line may be measured using a signal test connector provided on the signal line.
- FIG. 10 is a diagram for explaining an example of measuring a potential difference between two points on a signal line in the third embodiment.
- the electrical product 2 includes a substrate 3 and a power supply circuit. On the substrate 3, impedance elements such as semiconductor components and memories are arranged.
- the static electricity measuring instrument 9 is connected to signal test connectors 81 and 82 provided on the signal line.
- the electrostatic measuring instrument 9 always measures the potential difference between two points (signal test connectors 81 and 82) on the two signal lines sandwiching the impedance element while the electrical product 2 is assembled.
- the electrostatic measuring instrument 9 sends the measurement data of the potential difference between the two points to the computer 10. Send.
- the above threshold value is an index indicating electrostatic discharge that may affect quality, and is set based on experimental results and simulation results in advance. Since the computer 10 is as described in the first embodiment, detailed description thereof is omitted.
- the computer 10 records the measurement data transmitted from the static electricity measuring device 9 and gives a mark to the electrical product 2 for identifying that the electrical product 2 has been affected by electrostatic discharge.
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- Quality & Reliability (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Elimination Of Static Electricity (AREA)
- Supply And Installment Of Electrical Components (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
Description
前記電気製品の組み立てが行われている間、前記電気製品の内部のインピーダンス要素を挟んで電気的につながる電気線或いは信号線上の2点間の電位差を常時計測し、
静電気放電ノイズと正常電位範囲とを区別する所定の閾値を超える変化が前記2点間の電位差に生じた場合、前記2点間の電位差の計測データを記録するとともに、前記電気製品が静電気放電の影響を受けたことを識別するための標識を前記電気製品に対して付与することを特徴とする。
図1は、本発明の実施の形態1に係る装置構成について説明するための図である。
図1に示す装置は、作業台1を備えている。電気製品2は、作業台1上に置かれる。電気製品2は、少なくとも基板3と電源回路4とを備えている。基板3は半導体部品5を搭載している。基板3や電源回路4は、工具6を用いて電気製品2に搭載される。
図1に示す電気線7は、図2に示す2本の電気線71、72を含む。2本の電気線71、72は、電源回路4(図2では電源装置)と半導体部品5とを結線する。静電気計測器9は、電気線71上の1点と電気線72上の1点とに接続する。静電気計測器9は、2本の電気線71、72間の電位差を計測する。
図3は、実施の形態1において、電気製品2の組立工程の管理方法を説明するためのフローチャートである。図3に示すルーチンは、電気製品2の組立開始毎に実行される。
上述した実施の形態1の変形例について説明する。
図4は、実施の形態1の1つの変形例について説明するための図である。図4の構成は、コネクタ71a、72bを有する点を除き、図2の構成と同様である。コネクタ71aは、電気線71上の1点に接続され、コネクタ72bは電気線72上の1点に接続される。静電気計測器9は、コネクタ71aと72bに接続される。電位差の計測のためのコネクタ71a、72bが計測箇所である2点に予め用意されているため、静電気計測器9の取り付けが容易となり、電気製品2の組立工程の管理効率が高まる。
次に、図6~図9を参照して本発明の実施の形態2について説明する。
上述した実施の形態1では、インピーダンス要素(半導体部品)を挟んで電気的につながる電気線上の2点間の電位差を計測するため、電源回路4と半導体部品5との間の電気線7上の2点間の電位差を計測している。しかし、電位差の計測箇所はこれに限定されるものではない。実施の形態2では、電源回路4のコンセントの端子間の電位差を計測することとした。
図6に示す装置は、作業台1を備えている。電気製品2は、作業台1上に置かれる。電気製品2は、少なくとも基板3と電源回路4とを備える。基板3は半導体部品5を搭載している。基板3や電源回路4は、工具6を用いて電気製品2に搭載される。
図6に示す電気線20は、図7に示す2本の電気線73、74を含む。2本の電気線73、74は、電源回路4とそのコンセント21とを結線する。静電気計測器9は、電気線73上の1点と電気線74上の1点とに接続する。静電気計測器9は、2本の電気線73、74間の電位差を計測する。
図8は、実施の形態2において、電気製品2の組立工程の管理方法を説明するためのフローチャートである。図8に示すルーチンは、電気製品2の組立毎に実行される。このルーチンは、ステップS101がステップS201に、ステップS103がステップS203に、ステップS104がステップS204に置き換えられている点を除き、図3に示すルーチンと同様である。以下、図8において、図3に示すステップと同一のステップについては、同一の符号を付す。
上述した実施の形態2の変形例について説明する。図9は、実施の形態2の1つの変形例について説明するための図である。図9の構成は、静電気計測器9が計測データを送信する無線通信機能を備え、無線通信機11が追加されている点を除き、図6の構成と同様である。無線通信機11は、静電気計測器9が送信した計測データを受信し、コンピュータ10に送信する。このように静電気計測器9とコンピュータ10とを無線接続する構成としてもよい。
次に、図10を参照して本発明の実施の形態3について説明する。実施の形態1及び2では、電気線上の2点間の電位差を計測している。しかしながら、信号線上に設けられた信号テストのためのコネクタを利用して信号線上の2点間の電位差を計測することとしてもよい。
2 電気製品
3 基板
4 電源回路
5 半導体部品
6 工具
7 電気線
8 端子
9 静電気計測器
10 コンピュータ
11、13 無線通信機
12 有線伝送器
20 電気線
21 コンセント
71、72、73、74 電気線
71a、72b コネクタ
81、82 信号テスト用コネクタ
Claims (7)
- 半導体部品が搭載された基板と電源回路とを少なくとも備える電気製品の組み立て工程の管理方法であって、
前記電気製品の組み立てが行われている間、前記電気製品の内部のインピーダンス要素を挟んで電気的につながる電気線或いは信号線上の2点間の電位差を常時計測し、
静電気放電ノイズと正常電位範囲とを区別する所定の閾値を超える変化が前記2点間の電位差に生じた場合、前記2点間の電位差の計測データを記録するとともに、前記電気製品が静電気放電の影響を受けたことを識別するための標識を前記電気製品に対して付与することを特徴とする電気製品の組み立て工程の管理方法。 - 前記2点間の電位差として、前記電源回路と前記半導体部品とを結線する2本の電気線間の電位差を計測することを特徴とする請求項1に記載の電気製品の組み立て工程の管理方法。
- 電位差の計測のためのコネクタが計測箇所である前記2点に予め用意されていることを特徴とする請求項1又は2に記載の電気製品の組み立て工程の管理方法。
- 信号線上に設けられた信号テストのためのコネクタを利用して前記2点間の電位差を計測することを特徴とする請求項1に記載の電気製品の組み立て工程の管理方法。
- 前記2点間の電位差として、前記電源回路のコンセントの端子間の電位差を計測することを特徴とする請求項1に記載の電気製品の組み立て工程の管理方法。
- 前記2点間の電位差を100ns以下の計測周期で計測することを特徴とする請求項1乃至5の何れか1項に記載の電気製品の組み立て工程の管理方法。
- 前記2点間の電位差を計測する静電気計測器と、前記2点間の電位差の計測データを記録するコンピュータとを無線接続することを特徴とする請求項1乃至6の何れか1項に記載の電気製品の組み立て工程の管理方法。
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