Metal fusion bonding – Process – With condition responsive – program – or timing control
Patent
1992-01-22
1993-04-06
Seidel, Richard K.
Metal fusion bonding
Process
With condition responsive, program, or timing control
228103, 228110, 228 11, B23K 106, B23K 2010, B23K 3112
Patent
active
051996308
ABSTRACT:
A method, and apparatus for performing the method, for the ultrasonic contacting wired connection of electrical circuits to metallic leadframe strips, which apparatus essentially includes a bonding head with the energy transducer located thereon for feeding to the process point of the leadframe strip and for producing a longitudinal vibration amplitude is supplied with a first voltage, the bonding head is associated a measuring head fixed to a machine base, and the measuring head has an optical/electrical sensor which measures the instantaneous amplitude of the longitudinal vibration of the infeed of the bonding head and determining a correction factor mathematically from the measured quantities obtained, and the first ultrasonic value for the vibration amplitude of the energy transducer is calibrated with the correction factor.
REFERENCES:
patent: 4854494 (1989-08-01), Von Rabin
Felber Armin
Nehls Walter
ESEC SA
Knapp Jeffrey T.
Seidel Richard K.
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