ppm targets

PPM Targets are the maximum allowable defective parts per million specified for semiconductor products — quality targets that define the acceptable outgoing defect rate, determined by the end application's reliability requirements and customer expectations.

PPM Target Levels

• Automotive (AEC-Q100): <1 PPM — the most demanding target, reflecting safety-critical applications.
• Medical: <5 PPM — patient safety drives stringent quality requirements.
• Industrial/Telecom: <10-20 PPM — high reliability for infrastructure equipment.
• Consumer Electronics: <50-100 PPM — lower criticality allows slightly relaxed targets.

Why It Matters

• Test Strategy: PPM targets determine the required test coverage, burn-in strategy, and screening levels.
• Economics: Achieving <1 PPM requires significantly more testing than <100 PPM — major cost impact.
• Contractual: PPM targets are contractually specified — failure to meet them triggers penalties or business loss.

PPM Targets are the quality bar — application-specific defect rate limits that drive testing strategy, screening intensity, and manufacturing quality requirements.