Senior Product & Yield Device Engineer

Primary Responsibilities

Product-Level Technical Ownership

- Own yield, variability, and device performance across all manufacturing stages for assigned products.

- Lead deep technical investigations into complex yield limiters involving epitaxy, wafer processing, device architecture, inspection, and test systems.

- Develop physics-based hypotheses and validate them through structured DOE, statistical modeling, and experimental execution.

- Drive yield recovery plans from problem identification through verified improvement.

- Serve as the central technical authority for product behavior across internal teams and external customers.

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Epitaxy & Reactor Expertise

- Leverage strong understanding of compound semiconductor epitaxy and epi reactor fundamentals.

- Understand critical growth parameters including temperature uniformity, V/III ratio, precursor chemistry, chamber pressure, dopant incorporation, thickness control, strain management, and defect formation mechanisms.

- Correlate epitaxial variation to downstream optical and electrical device performance.

- Partner with Epitaxy Engineering to reduce wafer-to-wafer and run-to-run variability.

- Translate device-level failures into actionable feedback for reactor and process optimization.

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Advanced Data Analytics & Modeling

- Perform deep dives into large-scale manufacturing datasets using SQL, JMP, Python, or equivalent tools.

- Develop multivariate statistical models to isolate root causes of yield loss.

- Apply regression analysis, variance decomposition, SPC, and DOE methodology.

- Build predictive models for early detection of yield excursions.

- Develop automated data analysis workflows to accelerate technical learning cycles.

- Translate raw data into defensible, physics-based conclusions.

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Wafer Process & Device Integration

- Analyze interactions between epitaxy, lithography, etch, deposition, metallization, inspection (AVI), and electrical/optical test steps.

- Identify how upstream variability propagates into final device performance.

- Provide Design-for-Manufacturability (DFM) input during new product development.

- Reduce process sensitivity through structured experimentation and device-level insight.

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New Product Introduction (NPI)

- Own yield performance during new product ramp from development into high-volume manufacturing.

- Conduct structured technical risk assessments.

- Rapidly identify and mitigate yield sensitivities during early production.

- Shorten yield learning cycles using disciplined experimentation and data-driven decisions.

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Customer & External Technical Engagement

- Serve as a primary technical interface for key customers on yield, device performance, and reliability topics.

- Present complex technical findings clearly and confidently to customer engineering and quality teams.

- Lead technical discussions during customer audits and yield reviews.

- Support joint root cause investigations and corrective action plans.

- Translate internal manufacturing data into customer-relevant performance metrics.

- Build customer trust through clear, physics-based explanations of device behavior and variability.

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What Success Looks Like

- Sustained improvement in product yield and variability across the full manufacturing flow.

- Rapid containment and permanent resolution of yield excursions.

- Successful high-yield ramp of new products into volume manufacturing.

- Strong correlation established between epitaxial behavior and device-level outcomes.

- Development of predictive models that prevent yield loss before it occurs.

- Recognition internally and externally as a technical authority on product behavior.

- Earned trust from key customers through technical rigor and consistent performance.

Education & Experience

- PhD in Electrical Engineering, Applied Physics, Materials Science, or related discipline with strong emphasis on semiconductor device physics or relevant experience with Master/B-Eng.

-             5+ years of experience in semiconductor device, product, or yield engineering in high-volume manufacturing.

- Demonstrated history of independently leading complex technical investigations and delivering measurable yield improvement.

- Experience in compound semiconductor or optoelectronic device manufacturing strongly preferred.

Required Technical Skills

- Strong foundation in solid-state physics and semiconductor device operation.

- Working knowledge of compound semiconductor epitaxy and epi reactor operation.

- Understanding of key epitaxial variables including temperature control, V/III ratio, precursor flow stability, pressure control, strain, and dopant incorporation.

- Experience correlating material-level variation to device electrical and optical performance.

- Advanced proficiency in statistical analysis and DOE methodology.

- Proficiency in JMP,…