Product Engineer

Coherent•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 performance across wafers, lots, and manufacturing stages; identifies process or epitaxial excursions and quality concerns; and drives measurable yield improvements. It analyzes wafer- and die-level test data, including yield summaries, failure paretos, wafer maps, and statistical comparisons, to prioritize improvement opportunities. The engineer works cross-functionally with epitaxy, process engineering, device design, test, manufacturing, quality, and reliability teams to investigate failures, determine root causes, and implement corrective and preventive actions. The role verifies the effectiveness of those actions through device performance, yield improvement, and sustained process stability. It also plans and evaluates experiments, supports product characterization and specification reviews, and evaluates process changes to maintain product performance and manufacturability. The engineer communicates yield trends, findings, actions, and progress through technical reports and product reviews. The position works in office and semiconductor manufacturing environments. Employees must follow site EHS procedures and Coherent Corp. Corporate EHS standards. Depending on location, the role may include responsibilities for executing and maintaining applicable quality and environmental management standards, including ISO 9000, 9001, and 14001. The employee is expected to uphold the company’s ICARE values: Integrity, Collaboration, Accountability, Respect, and Enthusiasm.

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 own yield issues, prioritize investigations, and follow corrective actions through implementation and verification.
Strong interpersonal, teamwork, and technical communication skills.
Ability to work effectively with engineering, manufacturing, quality, and reliability colleagues 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, as required by the role.
Ability to follow applicable site EHS procedures and corporate EHS standards.

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, monitor performance, identify yield detractors, and drive measurable yield improvements.
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-level and die-level test data using yield summaries, failure paretos, wafer maps, and statistical comparisons to prioritize improvement opportunities.
Work 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.
Verify corrective and preventive action 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 and systems.
Adhere to the company’s ICARE values in all aspects of the position.