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IPC-TM-650 2.6.3.7
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IPC-TM-650 2.6.3.7 2007 Edition, March 1, 2007 Surface Insulation Resistance
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Description / Abstract:
This test method is used to quantify the deleterious effects of
fabrication, process or handling residues on Surface Insulation
Resistance (SIR) in the presence of moisture. The electrodes are
long parallel traces (printed interdigitated comb patterns) on a
standardized printed board or assembly. Samples shall be
conditioned and measurements taken at a high humidity. Electrodes
are electrically biased during conditioning to facilitate
electrochemical reactions.
Specifically, this method is designed to:
• Simultaneously assess
a) leakage current caused by ionized water films and
b) electrochemical degradation of test vehicle, (corrosion, dendritic growth).
• Provide metric(s) that can appropriately be used for binary classification (e.g., go/no go, pass/fail).
• Compare, rank or characterize materials and processes.
Specifically, this method is designed to:
• Simultaneously assess
a) leakage current caused by ionized water films and
b) electrochemical degradation of test vehicle, (corrosion, dendritic growth).
• Provide metric(s) that can appropriately be used for binary classification (e.g., go/no go, pass/fail).
• Compare, rank or characterize materials and processes.