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Title:
DISPLACEMENT DETECTOR FOR BONDING WIRE
Document Type and Number:
Japanese Patent JP2003054834
Kind Code:
A
Abstract:

To provide a displacement detector for detecting a displacement of bonding wire easily and automatically.

The displacement detector is provided with a unwinding spool 1, a plurality of pulleys 4, 5, 6, 7 through which the bonding wire 2 passes, a strain gauge 3 mounted on a mounting stay for the pulley 4 through which the bonding wire 4 from the unwinding spool 1 firstly passes. There is also provided a means for detecting that bonding wire 2 on the unwinding spool 1 has been overtaken according to an excessive output voltage of the strain gauge 3 and an excessive pulse width of a pulse wave detected in the output voltage of the strain gauge 3. When detecting overtaking, an alarm lamp is lit to inform an operator of the overtaking.


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Inventors:
MORI KAZUAKI
DAIGUUJI HIROSHI
AKUTSU SATOSHI
SATO FUMIO
Application Number:
JP2001000249328
Publication Date:
February 26, 2003
Filing Date:
August 20, 2001
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO
International Classes:
B65H49/18; H01L21/60; (IPC1-7): B65H49/18
Domestic Patent References:
JPS5892256U1983-06-22
JPH04100635A1992-04-02
JPH08206764A1996-08-13
Attorney, Agent or Firm:
鴨田 朝雄 (外1名)



 
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