Degradation of weld strength beyond that which is unacceptable in the end product can always be detected non-destructively. This detection is best made during the weld cycle by monitoring a combination of three parameters: voltage pulse, infrared radiation, and setdown. Other measurements evaluated but found impractical are: eddy current, joint resistance, and sonic/ultrasonic methods. Laboratory experiments show that weld criteria and instrumentation are easily developed.
In-Process Non-Destructive Microweld Inspection Techniques
Sae Technical Papers
Micro Electronic Packaging Conference ; 1968
01.02.1968
Aufsatz (Konferenz)
Englisch
Welding , Drag , Radiation , Inspections
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