Overview
This quality method record defines Electrochemical Migration Testing through purpose, specimen condition, equipment or method, sequence, acceptance logic, and traceable output. Equipment presence alone is not proof of tolerance, range, accreditation, or released capability.
Measurement route
The order makes assumptions and ownership visible before a result is promoted to a requirement.
- 01
Translate the drawing requirement
For Electrochemical Migration Testing, control dimensions, datums, layer stack, interfaces, tolerances, and assembly constraints in the released drawing.
- 02
Condition and identify specimens
For Electrochemical Migration Testing, document the functional requirement, operating boundary, interfaces, quantities, and acceptance owner against the current drawing.
- 03
Verify method and equipment status
For Electrochemical Migration Testing, agree the inspection method, sample plan, acceptance criteria, traceability, and report format before validation.
- 04
Capture result and uncertainty
For Electrochemical Migration Testing, document the functional requirement, operating boundary, interfaces, quantities, and acceptance owner against the current drawing.
- 05
Link disposition to lot and revision
For Electrochemical Migration Testing, complete link disposition to lot and revision against the controlled drawing, named assumptions, responsible owner, required evidence, and release decision.
Engineering review matrix
Each row links a design variable to evidence that can support a drawing or release decision.
| Variable | Control question | Verification route |
|---|---|---|
| Voltage definition | For Electrochemical Migration Testing, separate working, transient, test, common-mode, and fault voltages; identify polarity, waveform, duration, and source impedance. | Verify the released construction and method; do not infer a universal voltage rating. |
| Geometry | Spacing, creepage, clearance, edges, holes, crossovers, topography, and contamination paths must be visible in layout. | Inspect critical dimensions using defined datums and processed-part conditions. |
| Dielectric stack | Material, printed thickness, layer count, firing or cure, porosity, pinholes, and interfaces control isolation. | Measure processed thickness and defects, then correlate with construction-specific electrical testing. |
| Environment | Humidity, condensation, ionic contamination, chemicals, pressure, temperature, and altitude alter leakage and breakdown risk. | Condition specimens before and during bias or dielectric testing as required. |
| Failure response | Test energy, current limit, ramp, dwell, trip logic, re-test policy, and post-test inspection determine safety and meaning. | Record waveform, limits, result, specimen identity, and disposition. |
Failure controls
These are review prompts, not evidence that every risk applies or that every test is available.
- A
Surface leakage or tracking along contamination and protection interfaces
- B
Pinholes, voids, edge thinning, or topography reducing dielectric thickness
- C
Arc or breakdown at pads, edges, vias, cutouts, or damaged overcoat
- D
Latent damage from excessive test energy or undefined re-test policy
Inputs for a practical review
Unknown values may be labelled unknown. The review should convert uncertainty into an explicit decision or validation task.
Send Drawings- 01
Working, transient, fault, and test voltages with waveform and duration
- 02
Creepage, clearance, insulation, and leakage criteria
- 03
Complete conductor/dielectric/protection stack and geometry
- 04
Environment, humidity, altitude, contamination, and media
- 05
Test ramp, current limit, dwell, trip, and disposition