IEC 62880-1:2017 - Overview
IEC 62880-1:2017 is the International Electrotechnical Commission standard that specifies an isothermal (constant temperature) aging method to evaluate stress migration (SM) and stress-induced voiding (SIV) in copper (Cu) metallization test structures on microelectronics wafers. The procedure is intended primarily for wafer‑level technology development, providing test structures, methods and reporting requirements used for lifetime prediction and failure analysis. Because the test requires long aging times, it is not intended for routine production lot release testing, although under some conditions it can be adapted to package‑level evaluation.
Key topics and technical requirements
The standard documents the elements necessary to perform reproducible copper SM testing:
- Test purpose and scope - focus on SIV susceptibility in dual damascene Cu metallization with typical liners (Ta/TaN).
- SM test structures - recommended formats such as VIA chains (conventional VIA-at-end and VIA‑in‑the‑middle (VIM)), single Kelvin VIA designs, and nose‑pattern geometries to emphasize SIV risk related to plate width and VIA distance.
- Design rule compliant (DRC) vs wide plate patterns - guidance to cover technology extremes; suggested chain sizes for sensitivity (e.g., circa 100‑VIA chains, with larger counts optional).
- Test method content - specification of isothermal aging conditions, test equipment considerations, sample sizes, measurements, and failure/passing criteria.
- Data reporting - required results and metadata to support lifetime modeling and failure analysis.
- Informative annexes - explanations of SIV mechanisms, temperature and geometry dependence, VIA scaling, and sensitivity of test structures.
Practical applications
IEC 62880-1:2017 is used to:
- Assess SIV risk for new Cu metallization process flows during technology development.
- Provide inputs for lifetime prediction models and accelerated reliability studies.
- Support failure analysis by correlating test-structure failures with field failure modes.
- Compare design/layout variants (nose patterns, VIA placement, metal thickness) for SIV mitigation.
Who should use this standard
- Semiconductor process and reliability engineers
- Failure analysis teams and reliability labs
- Packaging engineers adapting wafer tests to packages
- R&D groups developing Cu interconnects and design-rule sets
Related standards
- Other parts of the IEC 62880 series (see IEC catalogue) address additional stress migration test topics and complementary test methods.
Keywords: IEC 62880-1:2017, stress migration, stress-induced voiding, SIV, copper metallization, isothermal aging, VIA chains, VIA-in-the-middle (VIM), wafer-level testing, semiconductor reliability, lifetime prediction.