Technetters,
What were the reliability studies used to support the negative etchback
requirements of IPC-6012 Figure 3-5?
Is a .0005" inch negative etchback acceptable for all class three
applications, when etchback is not specified?
Are there documented reliability gains when etchback is required on boards?



George Franck
Raytheon Systems
Falls Church Virginia
"My Opinions are just that."

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