JPS5529753A - Detecting method for foreign matter - Google Patents

Detecting method for foreign matter

Info

Publication number
JPS5529753A
JPS5529753A JP10271478A JP10271478A JPS5529753A JP S5529753 A JPS5529753 A JP S5529753A JP 10271478 A JP10271478 A JP 10271478A JP 10271478 A JP10271478 A JP 10271478A JP S5529753 A JPS5529753 A JP S5529753A
Authority
JP
Japan
Prior art keywords
foreign matter
detector
electronic component
exciter
aimed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10271478A
Other languages
Japanese (ja)
Inventor
Naotake Motoki
Kiyohito Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10271478A priority Critical patent/JPS5529753A/en
Publication of JPS5529753A publication Critical patent/JPS5529753A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Tests Of Electronic Circuits (AREA)

Abstract

PURPOSE: To fix an electronic component with foreign matter by detecting ultrasonic vibration caused when the foreign matter vibrates and strikes, by exciting the whole substrate.
CONSTITUTION: Printed substrate 2 is fixed to holding board 1 fixed to exciter 4 and with an aimed electronic component, detector 3 sensible to an ultrasonic wave is made in contact. Next, power is supplied to exciter 4 to vibrate printed substrate 2 and detector 3 entirely. If the aimed electronic component has foreign matter, vibration caused by its collision is detected by detector 3. For the purpose, the vibration is amplified and then observed through oscilloscope 9, so that the existence of the foreign matter can be found.
COPYRIGHT: (C)1980,JPO&Japio
JP10271478A 1978-08-25 1978-08-25 Detecting method for foreign matter Pending JPS5529753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10271478A JPS5529753A (en) 1978-08-25 1978-08-25 Detecting method for foreign matter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10271478A JPS5529753A (en) 1978-08-25 1978-08-25 Detecting method for foreign matter

Publications (1)

Publication Number Publication Date
JPS5529753A true JPS5529753A (en) 1980-03-03

Family

ID=14334927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10271478A Pending JPS5529753A (en) 1978-08-25 1978-08-25 Detecting method for foreign matter

Country Status (1)

Country Link
JP (1) JPS5529753A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130590A (en) * 1981-02-04 1982-08-13 Ebara Infilco Co Ltd Biological treatment of org. waste water
US5090244A (en) * 1988-06-03 1992-02-25 Thomson-Csf System for detecting free particles in a component housing and detection method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130590A (en) * 1981-02-04 1982-08-13 Ebara Infilco Co Ltd Biological treatment of org. waste water
JPS6331280B2 (en) * 1981-02-04 1988-06-23 Ebara Infilco
US5090244A (en) * 1988-06-03 1992-02-25 Thomson-Csf System for detecting free particles in a component housing and detection method

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