Product Engineer

Coherent Corp.•Sherman, TX

21d

About The Position

The Product Engineer owns product yield for InP edge-emitting lasers and photodiodes. The role monitors electrical and optical device trends across wafers, lots, and manufacturing stages; identifies process or epitaxial excursions and quality concerns; analyzes wafer- and die-level test data; and leads investigations into yield loss and device failures. The engineer collaborates with epitaxy, process engineering, device design, test, manufacturing, quality, and reliability teams to determine root causes and implement corrective and preventive actions, verifying their effectiveness through improved device performance, yield, and process stability. The position also plans and evaluates experiments to connect epitaxial properties and fabrication processes to device performance, supports product characterization and specification reviews, and evaluates process changes to preserve product performance and manufacturability. The engineer communicates trends, findings, corrective actions, and improvement progress in technical reports and product reviews. Work takes place in office and semiconductor manufacturing environments, with access to laboratory and manufacturing areas as required. Employees must follow site and corporate EHS procedures; depending on location, the role may also support applicable quality and environmental management standards.

Requirements

Minimum 4 years of relevant experience in semiconductor product engineering, device engineering, process engineering, or a related technical role.
BS/MS in Electrical Engineering, Physics, Materials Science, Optical Engineering, or a related discipline, or an equivalent degree.
Experience analyzing semiconductor device performance, investigating manufacturing yield loss, and applying structured root cause analysis.
Strong understanding of semiconductor laser fundamentals, including threshold current, optical gain and loss, slope efficiency, spectral behavior, and temperature-dependent performance.
Strong root cause analysis and problem-solving skills, including the ability to connect device behavior to potential epitaxial, fabrication, or test-related causes.
Working knowledge of statistical analysis, process control, and design of experiments.
Ability to take ownership of yield issues, prioritize investigations, and follow corrective actions through implementation and verification.
Strong interpersonal, teaming, and technical communication skills.
Ability to work effectively with engineering, manufacturing, quality, and reliability teams to resolve technical issues and improve product yield.
Ability to perform computer-based data analysis, prepare technical documentation, and participate in technical discussions.
Ability to access laboratory and manufacturing areas, including occasional standing and walking.
Adherence to company values and applicable safety procedures.

Nice To Haves

Experience with III-V semiconductor devices, particularly InP lasers or photodiodes.
Data processing, scripting, and automation skills, particularly experience with JMP/JSL, SQL, Python, or similar tools for analyzing large manufacturing datasets.

Responsibilities

Own product yield for InP edge-emitting lasers and photodiodes by monitoring performance, identifying yield detractors, and driving measurable improvement.
Monitor electrical and optical device trends across wafers, lots, and manufacturing stages to identify process or epitaxial excursions, performance shifts, and emerging quality concerns.
Analyze wafer- and die-level test data, including yield summaries, failure paretos, wafer maps, and statistical comparisons, to prioritize improvement opportunities.
Collaborate with epitaxy, process engineering, device design, test, manufacturing, quality, and reliability teams to investigate failures and establish root causes.
Develop and implement corrective and preventive actions with cross-functional teams and verify their effectiveness through device performance, yield improvement, and sustained process stability.
Plan and evaluate experiments to understand relationships between epitaxial properties, fabrication processes, and device performance.
Support product characterization, specification reviews, and evaluation of process changes to maintain product performance and manufacturability.
Communicate yield trends, investigation findings, corrective actions, and improvement progress through technical reports and regular product reviews.
Follow site EHS procedures and Coherent Corp. Corporate EHS standards.
Depending on location, execute and maintain applicable quality and environmental management standards.