B2902C four-wire contact-resistance measurement

Keysight Technologies · Geometric and electrical metrology

Purpose: Evaluate contact or interconnect resistance while reducing errors contributed by test leads.
Technical approach: B2902C uses separate Force/Sense connections for four-wire measurements; resistance compensation reduces thermal-EMF effects.
Scope of use: Suitable for low-resistance devices or test structures with accessible measurement terminals. Kelvin-via and RDL structures need corresponding connection layouts.
Limitations and open questions: These evaluation considerations are compiled by BLNKK from public information. They are not supplier guarantees or a mandatory submission checklist.
Scope and limitations
Four-wire sensing does not isolate a buried contact without separate terminals. Fixtures and settings affect accuracy; capture of every transient open is not guaranteed.
What to prepare
BLNKK suggests structure and terminal drawings, expected resistance, allowable test current, temperature conditions and repeated measurements.
Confirm with the supplier
Confirm Kelvin fixtures, current/integration settings, thermal-EMF compensation, system uncertainty and time resolution.
Public evidence: Keysight's resistance page lists B2902C; the B2900C/CL guide explains Kelvin connections, lead error and resistance compensation.

Supporting references

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