Process Engineer

Primary Duties & Responsibilities

1. Process Development & Optimization

• Develop and optimize chemical-mechanical polishing and fine grinding techniques for ZnSe.
• Establish process parameters (abrasive selection, pressure, speed, slurry composition, pH control, temperature).

• Reduce defects such as surface haze, scratches, subsurface damage, and roughness through process improvements.

• Production & Quality Control

• Implement statistical process control (SPC) for polishing uniformity.

• Define quality criteria (flatness, roughness, surface irregularities) based on interferometry.

• Work with the Quality Assurance team to ensure compliance with optical performance standards (ISO 10110, MIL-PRF-13830B).

• Tooling & Equipment Management

• Maintain and optimize lapping and polishing equipment (single/double-sided polishers, planetary systems).

• Evaluate new tools, pads, slurries, and coatings to enhance performance.

• Develop predictive maintenance programs to ensure equipment reliability.

• Defect Analysis & Root Cause Investigation

• Perform failure analysis using optical microscopy, interferometry, and SEM.

• Address process deviations and propose corrective actions to minimize yield loss.

• Optimize edge rounding, stress-relief polishing, and surface conditioning techniques.

• Process Automation & Efficiency Improvements

• Implement automation and Industry 4.0 technologies for real-time process monitoring.

• Develop standard work procedures and automation scripts for consistent polishing outcomes.

• Environmental & Safety Compliance

• Ensure handling of ZnSe follows EPA, OSHA, and material safety regulations.

• Develop waste management protocols for slurry disposal and recycling.
  Conduct risk assessments (FMEA, HAZOP) for chemical exposure and process hazards.

Education & Experience

Required:

• Bachelor's Degree in Engineering (Materials Science, Mechanical, Optical, or Manufacturing Engineering)
• 1-3 years of experience in precision optics polishing, CMP, or semiconductor wafer processing
• Proficiency in ZnSe material properties, surface roughness control, and finishing techniques
• Experience with abrasives (CeO₂, Al₂O₃, diamond), slurries, and polishing chemistries
• Strong knowledge of ISO 10110 optical surface specifications and MIL standards
• Familiarity with metrology tools (interferometers, profilometers, AFM, SEM)

Preferred:

• Six Sigma Certification (Green/Black Belt) for process optimization
• Experience with precision optics manufacturing (lenses, IR windows, laser optics)
• Knowledge of fluid dynamics in polishing slurry distribution
  Proficiency in Python, MATLAB, or LabVIEW for process automation

Skills

• Process Optimization & Root Cause Analysis – Expertise in reducing polishing defects
• Material Science & Surface Engineering – Understanding of ZnSe behavior under different conditions
• Metrology & Quality Assurance – Experience with precision optical measurements
• Lean Manufacturing & Continuous Improvement – Experience with SPC, DOE, and yield enhancement
• Technical Writing & Documentation – SOP development for consistent process execution
• Work effectively with other members of Coherent Corp.

Working Conditions

• Cleanroom or controlled laboratory environment with polishing equipment
• May involve chemical handling and exposure to polishing slurries
• Requires close collaboration with production, and quality teams

Culture Commitment

Ensure adherence to company's values (ICARE) in all aspects of your position at Coherent Corp.:

I ntegrity – Create an Environment of Trust

C ollaboration – Innovate Through the Sharing of Ideas

A ccountability – Own the Process and the Outcome

R espect – Recognize the Value in Everyone

E nthusiasm – Find a Sense of Purpose in Work

Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.

Coherent Philippines Pte Ltd shares the 5 key principles of fair employment practices and is committed to adopting these principles in the management of our human resources. We believe that the effective implementation of fair employment practices will bring about a more harmonious and progressive work environment within our organization, and contribute towards making Philippines a great place to work.

ABOUT US

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.

ABOUT THE TEAM