Job Description

Responsibilities:

Wafer Process Ownership

• Own and optimize the integrated wafer fabrication process flow for assigned products.
• Define and maintain wafer process specifications and control strategies, including MES process flow setup.
• Analyze process, inline, and test data to understand process behavior and improve yield and manufacturability.
• Investigate and resolve process deviations and product test failures through systematic root cause analysis.
• Implement corrective and preventive actions to improve yield, process stability, and product quality.
• Provide shop floor guidance and support manufacturing teams during process issues.
• Maintain technical documentation including process specifications, change records, and experimental results.

New Product Introduction

• Design and optimize integrated process flows to enable new products and device concepts.
• Collaborate with Chip Design and Process Engineering to balance device performance and manufacturability.
• Plan and manage wafer lots used for prototyping and product development.
• Characterize integrated processes and evaluate the impact of process and design tolerances on yield and device performance.
• Support ramp-up and stabilization of new products in manufacturing.

Process and Technology Development

• Development and optimization of new process integration technologies for current and next-generation InP PIC platforms to expand process capability.
• Plan and execute experiments to develop and optimize process modules.
• Ensure new integration technologies reach maturity suitable for product process flows.

Collaboration

• Work closely with Chip Design, Process Engineering, Product Engineering, Manufacturing, and Quality teams.
• Collaborate with global Coherent sites (e.g. Sherman, Fremont, Zürich)

Skills & Qualifications:

We are looking for candidates with a strong foundation in semiconductor processing, process integration, and device physics. Experience with III-V or photonic device fabrication is highly advantageous but not required.

Required

• MSc or PhD in Engineering Physics, Electrical Engineering, Optoelectronics, or a related field.
• Hands-on experience working with semiconductor fabrication processes and equipment in a cleanroom environment.
• Familiarity with semiconductor fabrication processes such as epitaxy, wet etching, plasma etching, thin-film deposition, and photolithography.
• Experience in semiconductor process integration, process engineering, or related roles in a semiconductor fabrication environment.
• Experience developing or supporting semiconductor processes from development through product ramp and high-volume manufacturing.
• Experience with III–V semiconductor or photonic device fabrication is highly advantageous, but candidates with relevant experience from other semiconductor technologies are also encouraged to apply.

Technical Skills

• Strong understanding of semiconductor process integration and interactions between multiple fabrication steps.
• Ability to analyze manufacturing, inline, and test data to understand process behavior and identify root causes of yield or device performance issues.
• Experience with statistical methods and tools for process analysis and control (e.g., DOE, FMEA, JMP or similar tools).
• Experience with process characterization and metrology techniques such as SEM, EDX, electrical measurements, and materials analysis.
• Experience with CAD layout tools for lithography mask design is beneficial.
• Knowledge of optoelectronic device physics or III–V device design is a plus.

Language

• Fluent in English.
• Swedish proficiency is an advantage, with willingness to develop working proficiency.

Who You Are

• Self-driven and naturally curious, with strong motivation to understand underlying process and device interactions and drive technical solutions to completion.
• Strong analytical and problem-solving skills, with the ability to interpret complex process and test data and identify root causes of yield or device performance issues.
• Detail-oriented and structured, with the ability to track and organize complex process information across multiple fabrication steps, experiments, and datasets.
• Clear and effective written and verbal communication skills, with the ability to present technical analyses and recommendations to cross-functional engineering teams.
• Ability to collaborate effectively with teams including chip design, process engineering, manufacturing, product engineering, and quality.
• Ability to understand different perspectives and translate technical requirements into clear and practical process instructions for manufacturing teams.

In this role, you will apply these capabilities in a highly collaborative environment, where clear communication, ownership, and continuous improvement are essential.

We believe you demonstrate behaviors aligned with our ICARE values:

• Integrity – You take ownership and ensure high quality and accuracy in your work
• Collaboration – You work effectively across teams and functions
• Accountability – You drive results and take responsibility for outcomes
• Respect – You value different perspectives and contribute to a positive work environment
• Excellence – You are curious, analytical, and continuously seek improvements

Working Environment

• A substantial portion of the work takes place in the wafer fabrication cleanroom, particularly during process development, product ramp-up, and manufacturing issue resolution.
• Combination of hands-on work, analysis, and cross-functional collaboration.

Recruitment Process

At Coherent, we follow a structured and fair recruitment process:

• Applications are reviewed continuously
• Initial screening by HR
• Competency-based interviews with hiring manager and team
• Final candidates may undergo background checks, reference checks, and medical testing (including alcohol and drug testing)
• For some roles, union consultation may be required before final decision

We encourage internal candidates to apply and explore development opportunities within Coherent.

Additional Information

• This role has no direct reports
• Senior candidates may take on mentoring responsibilities
• Right to work in Sweden is required

Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!

Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.