For those of you doing solderability testing, what sorts of parameters should we be concerned about for reliable results?  Our tester already allows inputs for lead perimeter, cross sectional area, and hang time.  My company's testing also specifies immersion angle, depth, and speed as well as the type of flux.  By controlling these factors, can I expect repeatable results?

It has been suggested that we also need to limit the length of the leads for our testing as wall as installing a thermal break between the lead and the hanger.  Both have been blamed for failing test results.  Has anyone experienced changes in test results from these variables?

Neil Flatter
TRW-Automotive
Process Quality

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