Overview
This quality method record defines Metallized Via Continuity and Resistance 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 Metallized Via Continuity and Resistance Testing, control dimensions, datums, layer stack, interfaces, tolerances, and assembly constraints in the released drawing.
- 02
Condition and identify specimens
For Metallized Via Continuity and Resistance Testing, document the functional requirement, operating boundary, interfaces, quantities, and acceptance owner against the current drawing.
- 03
Verify method and equipment status
For Metallized Via Continuity and Resistance Testing, agree the inspection method, sample plan, acceptance criteria, traceability, and report format before validation.
- 04
Capture result and uncertainty
For Metallized Via Continuity and Resistance Testing, document the functional requirement, operating boundary, interfaces, quantities, and acceptance owner against the current drawing.
- 05
Link disposition to lot and revision
For Metallized Via Continuity and Resistance 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 |
|---|---|---|
| Nominal function | For Metallized Via Continuity and Resistance Testing, resistance, ratio, tolerance, TCR, voltage, power, pulse, and stability need a defined reference condition. | Measure value and ratio with stated probe geometry, temperature, dwell, and instrument conditions. |
| Geometry and sheet resistance | Paste sheet resistance and effective length-to-width set first-order value; corners and terminations disturb the ideal square model. | Correlate released artwork and processed-film measurements with actual resistance distribution. |
| Termination effects | Conductor overlap, current crowding, contact resistance, aspect ratio, and refire interactions can dominate short geometries. | Use Kelvin or controlled probing where termination resistance is material. |
| Loading and temperature | Power density, substrate spreading, terminal cooling, voltage coefficient, ambient, and duty determine self-heating and drift. | Verify resistance change and temperature field at the intended electrical and thermal boundary. |
| Trim and protection | Trim allowance, cut shape, measurement loop, stability margin, overglaze, and post-trim processing form one sequence. | Record pre-trim, target, post-trim, post-protection, and stability results against the released lot. |
Failure controls
These are review prompts, not evidence that every risk applies or that every test is available.
- A
Value offset from geometry, thickness, firing, or termination interaction
- B
Local overheating and irreversible drift under load
- C
Trim-cut stress, current crowding, or inadequate stability margin
- D
Noise, voltage-coefficient error, humidity drift, or ratio mismatch
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
Nominal resistance or ratio and complete tolerance budget
- 02
TCR, voltage, power, pulse, duty, and temperature range
- 03
Artwork, resistor dimensions, terminals, and trim keep-outs
- 04
Probe method, reference temperature, and acceptance method
- 05
Protection, environment, stability, and reliability profile