Job's mission

As a Senior Field Process Engineer, you will serve as a technical leader driving advanced process optimization and integration for ASM’s semiconductor manufacturing customers. Your expertise will directly influence customer satisfaction, product performance, and internal technology development. This role is pivotal in shaping ASM’s strategic engagement with key accounts and mentoring the next generation of engineering talent.

What you will be working on

• Lead the development and implementation of advanced thin-film deposition process solutions.
• Act as the technical lead for complex customer projects, ensuring timely delivery and high satisfaction.
• Own external field escalations and quality investigations, documenting and publishing lessons learned internally and externally.
• Analyze complex data sets to develop actionable plans and ensure successful outcomes.
• Maintain scorecards for owned applications, identify gaps, and drive closure plans to completion.
• Independently manage process and hardware development, device integration, CIP, and troubleshooting to meet product specifications.
• Understand customer integration strategies across multiple applications and identify new business opportunities for ASM.
• Collaborate with senior engineers and customers to align on technology roadmaps, process flows, and strategic inflection points.
• Proactively resolve technical issues and develop solutions that enhance ASM’s market position.
• Partner with customers to define process and integration requirements.
• Generate and present technical documentation, reports, and presentations to customer leadership and internal business units.
• Provide mentorship and guidance to junior engineers.

What we are looking for

• Master’s or Ph.D. in Material Science, Chemical Engineering, Physics, or a related technical discipline.
• In-depth work experience in thin-film deposition or related semiconductor processes, preferably within an OEM capital equipment company.
• Proven ability to build trusted partnerships with customers and internal stakeholders.
• Strong customer-focused mindset with a results-driven approach.
• Excellent verbal and written communication skills in both Korean and English, with the ability to present technical and strategic content to diverse audiences.
• Proficiency in Microsoft Office Suite, especially Excel and PowerPoint.
• Demonstrated leadership in team environments, with the ability to supervise and inspire others.
• Willingness to work in a cleanroom environment while adhering to safety protocols and wearing appropriate PPE.

WHO WE ARE  

Factorial Energy is a pioneering U.S.-based solid-state battery company driving the future of energy storage and electrification. Partnered with global leaders including Mercedes-Benz, Stellantis, Hyundai, and Kia, Factorial is at the forefront of developing next-generation e-mobility platforms for commercial, defense, and consumer applications—spanning electric vehicles (EVs), drones, eVTOL aircraft, power tools, marine systems, robotics, and more. The company has achieved multiple industry firsts, including being the first to power a demonstration vehicle with a global OEM (Mercedes-Benz) which achieved over 1,200 km (749 mi) of range, the first to earn UN 38.3 certification for automotive-sized solid-state cells, and the first to deliver B-samples of automotive-sized solid-state batteries to major OEMs. 

The Opportunity

Factorial is looking for an All-Solid-State Battery Anode Wet & SE Slurry Coating Process Engineer responsible for the wet slurry coating process and equipment development for anode and sulfide-based solid electrolyte (SE) applications. We leverage cutting-edge wet electrode manufacturing to revolutionize all-solid-state battery performance, cost, and scalability. This role requires experience in close cooperation with internal teams and external partners. This candidate will be involved from the beginning of process optimization for R&D projects, pilot line scale-up, and through to low/high-volume production. The candidate must demonstrate excellent written and verbal communication skills to facilitate efficient communication between various departments/vendors.

Duties and Responsibilities 

Duties and responsibilities include, but are not limited to: 

All-Solid-State Battery Anode Wet & SE Slurry Coating Process Development

• Lead R&D efforts to design, optimize, and scale wet slurry coating processes for ASSB anode and sulfide SE applications.
• Develop novel slurry formulations and coating strategies to enhance electrode-electrolyte interfacial compatibility, ionic transport efficiency, and cycling stability.
• Establish critical process parameters (e.g., slurry dispersion, viscosity control, coating speed, drying profiles) to meet all-solid-state battery performance specifications.
• Address key wet coating challenges specific to ASSB: solvent selection, slurry sedimentation, SE-solvent compatibility, and interfacial side reaction control.

Quality & Yield Improvement

• Identify root causes of wet coating defects (e.g., pinholes, thickness non-uniformity, cracks, lithium dendrite penetration) and implement corrective actions.
• Utilize statistical analysis (SPC, DOE) to drive yield improvements and reduce process variability.
• Collaborate with PD/QA to define testing protocols and quality standards for wet-processed all-solid-state electrodes.

Production Efficiency & Scalability

• Optimize manufacturing workflows to increase throughput and reduce unit production costs.
• Design experiments to validate process scalability from lab to pilot line to mass production.
• Troubleshoot equipment/process issues to minimize downtime.

Next-Generation Equipment Development

• Partner with equipment vendors to conceptualize, prototype, and validate next-gen wet coating electrode machinery.
• Define technical specifications for new equipment (e.g., vacuum-integrated drying systems, solvent recovery units).
• Drive innovation in automation, in-line monitoring, and Industry 4.0 integration.

Must Have Qualifications

Technical Expertise:

• 3+ years of hands-on experience in wet electrode coating manufacturing for lithium-ion batteries, sulfide electrolyte system experience highly preferred.
• Deep knowledge of wet process steps: slurry preparation (dispersion, deaeration), precision coating (doctor blade/slot-die), vacuum drying, calendaring, and lamination.
• Proficiency in material characterization (SEM, XRD, adhesion testing) and data analysis tools (JMP, Minitab).

Process & Quality Tools:

• Mastery of DOE, SPC, FMEA, and Six Sigma methodologies.
• Experience scaling processes from R&D to high-volume production.

Equipment & Innovation:

• Proven ability to collaborate with equipment suppliers on custom solutions.
• Familiarity with ASSB-specific process challenges (moisture control, interfacial stability, mechanical pressure sensitivity).

Education & Collaboration:

• Master's in chemical/Materials/Mechanical Engineering or related field.
• Strong cross-functional skills to work with R&D, production, and supply chain teams.

Nice to Have Qualifications

Preferred Qualifications:

• Hands-on experience with sulfide solid electrolyte systems or halide electrolyte systems.
• In-depth understanding of binder systems (PVDF, CMC/SBR) and conductive additives behavior in wet coating processes.

Job's mission

As a Field Service Engineer (FSE) at ASM, you’ll be at the heart of our customer operations. This role is your chance to gain hands-on experience with our advanced semiconductor equipment and contribute to our customers’ success by ensuring our technology performs flawlessly. Join a supportive team and grow your technical skills in a fast-moving, innovative environment.

What you will be working on

• Installation and setup of ASM semiconductor equipment at customer sites.
• Diagnosing and resolving technical issues.
• Conduct preventive maintenance and basic tool performance checks.
• Complete structured training in ASM system operation and customer support.
• Document service activities and provide internal updates.
• Follow cleanroom protocols and safety procedures.

What we are looking for

• Bachelor’s degree in Electrical, Mechanical, Mechatronics, Chemical Engineering, or related field.
• at least 3years of relevant experiences(cs, field service)
• A candidate who is willing to work in either Icheon or Cheongju
• Strong interest in semiconductor equipment and field service work.
• Understanding of electrical/mechanical systems or automation.
• Excellent problem-solving and communication skills.
• Fluent in Korean and English.
• Commute regularly to sites in Icheon, with occasional travel to Cheongju and other sites as well.
• Willingness to work in cleanroom environments.

Job's mission

Step into a career where your academic expertise becomes the foundation for real-world innovation. As a Field Process Engineer at ASM, you’ll work directly with customers to optimize thin-film deposition processes that power the future of semiconductor technology. You’ll be part of a collaborative team driving performance, precision, and customer satisfaction.

What you will be working on

• Conduct process engineering research, development, and evaluation to support ASM’s business goals.
• Provide technical guidance during tool installs, repairs, operations, and calibration.
• Develop and refine process recipes, collaborating with hardware engineering to meet customer performance targets.
• Analyze complex data to define problems, develop solutions, and deliver actionable recommendations.
• Partner with customers to optimize tool performance and meet integration requirements.
• Create and present technical documentation, reports, and presentations for internal and customer audiences.

What we are looking for

• Master’s or Ph.D. in Material Science, Chemical Engineering, or Physics.
• Strong customer-focused mindset and communication skills in Korean and English.
• Ability to work in a cleanroom environment with appropriate safety equipment.
• Proficiency in MS Office tools.

What sets you apart

• 2+ years of relevant experience for Master’s degree holders.
• Deep understanding of semiconductor process flows, especially ALD, PEALD, EPI, CVD, PECVD.
• Knowledge of thin-film deposition technologies.
• Commitment to safety and adherence to established procedures.

Job's mission

Step into a career where your academic expertise becomes the foundation for real-world innovation. As a Field Process Engineer at ASM, you’ll work directly with customers to optimize thin-film deposition processes that power the future of semiconductor technology. You’ll be part of a collaborative team driving performance, precision, and customer satisfaction.

What you will be working on

• Conduct process engineering research, development, and evaluation to support ASM’s business goals.
• Provide technical guidance during tool installs, repairs, operations, and calibration.
• Develop and refine process recipes, collaborating with hardware engineering to meet customer performance targets.
• Analyze complex data to define problems, develop solutions, and deliver actionable recommendations.
• Partner with customers to optimize tool performance and meet integration requirements.
• Create and present technical documentation, reports, and presentations for internal and customer audiences.

What we are looking for

• Ph.D. in Material Science, Chemical Engineering, or Physics.
• 2+ years of relevant experience for Master’s degree holders.
• Strong customer-focused mindset and communication skills in Korean and English.
• Ability to work in a cleanroom environment with appropriate safety equipment.
• Proficiency in MS Office tools.
• Deep understanding of semiconductor process flows, especially ALD, PEALD, EPI, CVD, PECVD.
• Knowledge of thin-film deposition technologies.
• Commitment to safety and adherence to established procedures.
• Fluent English communication 

Job's mission

As a Senior Engineer II, Process Engineering (PECVD) at ASM Korea, you will play a key role in developing, optimizing, and supporting advanced PECVD processes for leading semiconductor customers.
This role is based in Korea, with primary responsibility for supporting Japan-based customers and projects, requiring strong execution capability, deep process understanding, and excellent communication skills in a global environment. You will work closely with customers, field, and global R&D teams to enable high‑volume manufacturing and next‑generation device applications.

What you will be working on

• Develop, optimize, and support PECVD processes for dielectric and functional thin films (including SiO, SiC) for logic, memory, analog, power, and MEMS applications.
• Design, execute, and analyze complex experiments using DOE and RSM, and interpret advanced process and materials characterization results.
• Drive process transfer, customer demonstrations, and high‑volume manufacturing (HVM) support.
• Troubleshoot process and equipment issues through hands‑on engagement and structured problem‑solving methodologies.
• Collaborate with global R&D, field service, and marketing teams to define customer requirements and deliver robust process solutions.
• Produce and present technical documentation, internal reports, and customer-facing materials, ensuring clarity and execution readiness.

What we are looking for

• Master’s degree or PhD in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or related field.
• Hands‑on experience with PECVD or related thin film deposition technologies (e.g., ALD, PEALD, CVD, Epitaxy).
• Strong understanding of thin film materials and semiconductor process integration.
• Experience with materials characterization techniques such as XPS, SIMS, SEM, TEM, AFM, XRD, ellipsometry, or equivalent.
• Ability to work independently in complex, execution‑driven environments and manage multiple technical priorities.
• Fluent English communication skills required for daily collaboration with global and Japan-based stakeholders.
• Willingness to travel to Japan as required to support projects.

What sets you apart

• PhD degree preferred, especially with research or industry experience in PECVD process development.
• Direct experience with SiO and/or SiC film development for advanced device applications.
• Strong background in high‑volume manufacturing (HVM) support and customer‑facing process execution.
• Ability to bridge process technology, equipment behavior, and customer requirements effectively.
• Japanese language proficiency is a strong plus.
• Demonstrated ability to author technical papers, contribute to intellectual property, or present to technical audiences.

Job's mission

As a Principal / Senior Process Engineer, you will play a key role in advancing ASM’s semiconductor process technologies. You’ll leverage your expertise in thin-film deposition and materials characterization to develop innovative solutions for next-generation devices. Your work will directly influence product performance and enable breakthroughs in logic, memory, and power applications.

What you will be working on

• Research, develop, and optimize semiconductor processes focused on Advanced Packaging including depositions (ALD, PECVD, PVD, ECP) and surface preparation.
• Design and conduct complex experiments using DOE and RSM methodologies; interpret and analyze experimental data.
• Develop new films or processes for emerging packaging applications like W2W/D2W Hybrid bonding and perform advanced materials characterization.
• Provide mentorship to Process Engineers and lead technical problem-solving sessions using scientific methods and tools such as Ishikawa diagrams.
• Collaborate with customers and marketing teams to define requirements and execute demonstrations.
• Troubleshoot equipment issues through hands-on engagement and ensure successful product transfer to customers.
• Draft technical papers, generate Intellectual Property, and present findings to professional audiences.
• Travel up to 10% to support remote sites and customer engagements.
• May supervise process engineering technicians and provide input on performance evaluations.

What we are looking for

• Bachelor's, Master’s or PhD in Chemical Engineering, Materials Science, Electrical Engineering, or Physics.
• Direct experience working on D2W/W2W Hybrid bonding including surface preparation steps
• Minimum 10 years of combined education, research, and work experience in thin-film deposition (ALD, CVD, PECVD) and advanced packaging processes.
• Proficiency in materials characterization techniques (XPS, SIMS, RBS, AFM, XRR, XRD, TEM, SEM, ellipsometry).
• Knowledge of electrical characterization techniques for CMOS devices.
• Ability to manage complex process development projects, including schedules, budgets, and personnel.

What sets you apart

• Expertise in integration advanced packaging process flows like CoWoS, SoIC, InFO.
• Experience in contributing Process and equipment qualification data towards a full Semiconductor equipment PLC process
• Experience with advanced metrology/Inspection characterization techniques
• Strong communication skills to convey technical concepts clearly.

Job's mission

What you will be working on

• Researching, developing, and optimizing thin film deposition processes, with a focus on metal and dielectric films using PEALD and related technologies.
• Designing and executing complex experiments using Design of Experiments (DOE) and Response Surface Methodology (RSM), and interpreting experimental results.
• Developing new film materials and processes for emerging semiconductor applications based on strong chemistry and materials science fundamentals.
• Actively troubleshooting process and equipment issues through hands-on engagement.
• Participating in and driving structured technical problem-solving using scientific methodologies and industry tools.
• Collaborating with customers and central marketing to define requirements and execute customer demonstrations.
• Supporting product transfer to customers by delivering demonstrations, training field service teams, creating technical documentation, and traveling to customer sites (up to 10%).
• Authoring technical papers and contributing to intellectual property (IP) generation related to process and technology development.

What we are looking for

• PhD in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related field or MS degree with 2+ years of relevant industry experience.
• Hands-on experience with PEALD, ALD, PECVD, CVD, Epitaxy, or other thin film deposition technologies.
• Strong understanding of thin film deposition principles and semiconductor process development.
• Experience designing and characterizing deposition processes using first principles and experimental design techniques.
• Ability to independently manage complex process development activities.
• Excellent communication skills in English and Korean, with the ability to clearly explain complex technical concepts.

What sets you apart

• Knowledge of electrical characterization techniques for CMOS devices.
• Experience integrating metal and/or dielectric films into FEOL and BEOL process flows.
• Hands-on experience with materials characterization techniques such as XPS, SIMS, AFM, XRD, TEM, SEM, Raman, or ellipsometry.
• Experience authoring technical publications and/or patents in the semiconductor industry.
• Strong collaboration skills with customers, field teams, and cross-functional stakeholders.

Job's mission

As an Engineer II, Equipment Engineering at ASM, you will support the development, installation, and stable operation of advanced R&D equipment in new product development.
This role is ideal for engineers who have a strong understanding of semiconductors equipment support and are ready to deepen their hands-on technical expertise within a collaborative R&D environment.

You will work closely with cross-functional engineering teams to ensure equipment reliability, safety, and performance, contributing directly to the successful execution of new product design and development activities

What you will be working on

• Support installation, upgrade, troubleshooting, and preventive maintenance of R&D equipment during new product development
• Assist with first builds, bring-up, and testing of new products in collaboration with R&D and facilities teams
• Perform hands-on troubleshooting and root cause analysis to restore and maintain equipment performance and uptime
• Support daily operation and monitoring of R&D lab equipment to ensure stable and reliable tool performance
• Collaborate with Hardware, Electrical, Process, and Software engineers during equipment development and integration phases
• Follow established best-known methods (BKM) and support documentation of service, preventive, and corrective maintenance procedures
• Adhere to safety standards and standard operating procedures in all equipment-related activities
• Escalate complex or recurring equipment issues to senior engineers as appropriate and support resolution efforts
• Participate in continuous improvement initiatives to enhance equipment reliability, efficiency, and usability

What we are looking for

• Bachelor’s degree in Electrical Engineering, Mechanical Engineering, Chemical Engineering, or a related engineering discipline
• 5-6+ years of relevant experience in the semiconductor industry supporting equipment in R&D, lab, or manufacturing environments
• Hands-on experience with semiconductor equipment installation, maintenance, or troubleshooting
• Basic understanding of wafer fab operations, gas and vacuum systems, and equipment control concepts
• Familiarity with cleanroom or laboratory environments and safe handling of chemicals, gases, or related systems
• Ability to communicate effectively in English and Korean and work collaboratively across engineering teams

What sets you apart

• Experience with deposition equipment such as PEALD, PECVD, or similar thin-film tools
• Expertise to RF-induced plasma systems, electro-pneumatic controls, robotics, or microprocessor-based controllers
• Experience supporting early-stage or first-of-kind equipment in an R&D environment
• Strong troubleshooting mindset with a proactive, hands-on approach to problem solving

Job's mission

As a Specialist I, Facility Management, you will ensure safe, stable, and efficient facility operations for our R&D environment. You will maintain and improve critical utilities—especially gas supply and abatement systems—and support the design and installation of utility infrastructure for PEALD R&D equipment. This role combines hands‑on maintenance with project execution and compliance, enabling reliable lab operations.

What you will be working on

• Maintain and troubleshoot utility supply systems (gas/chemical, abatement, facility utilities) to ensure stable operation
• Review facility/equipment specifications, evaluate system performance, and propose improvements for efficiency
• Plan and coordinate maintenance schedules; supervise and coordinate contractors for on‑site work
• Design and manage facility expansion, layout changes, and system implementations
• Conduct project cost analysis, prepare budgets, and track execution
• Ensure compliance with safety regulations (e.g., chemical control laws, high‑pressure gas safety) and prepare reports/documentation
• Support utility installation for PEALD R&D tools and related semiconductor sub‑equipment

What we are looking for

• Bachelor’s degree in Mechanical Engineering or a related field
• 3+ years as a Facility Engineer or similar role
• Practical knowledge of gas and chemical supply systems used in semiconductor equipment
• Hands‑on experience with utility setup for semiconductor tools
• Experience operating abatement systems (e.g., Burn‑Wet Scrubber) and gas supply systems (e.g., Gas Cabinets, V.M.B)
• Knowledge of semiconductor utility system maintenance and relevant safety regulations
• Engineering certifications in gas and/or refrigeration/HVAC (or equivalent) — required
• Strong problem‑solving skills and project execution experience
• Effective communication and interpersonal skills; self‑driven and responsible work style
• Proficiency with AutoCAD, SAP, MS Office, and PLCs
• Fluent in English and Korean

What sets you apart

• Experience integrating utilities for PEALD or similar R&D semiconductor environments
• Proven track record improving system efficiency and facility reliability via data‑driven assessments
• Experience leading contractor/vendor management and multi‑stakeholder projects
• Advanced skills in P&ID reading, risk assessment, and change management for facilities
• Familiarity with compliance reporting and audits in regulated environments

Job's mission

As a Senior Field Process Engineer, you will serve as a technical leader driving advanced process optimization and integration for ASM’s semiconductor manufacturing customers. Your expertise will directly influence customer satisfaction, product performance, and internal technology development. This role is pivotal in shaping ASM’s strategic engagement with key accounts and mentoring the next generation of engineering talent.

What you will be working on

• Lead the development and implementation of advanced thin-film deposition process solutions.
• Act as the technical lead for complex customer projects, ensuring timely delivery and high satisfaction.
• Own external field escalations and quality investigations, documenting and publishing lessons learned internally and externally.
• Analyze complex data sets to develop actionable plans and ensure successful outcomes.
• Maintain scorecards for owned applications, identify gaps, and drive closure plans to completion.
• Independently manage process and hardware development, device integration, CIP, and troubleshooting to meet product specifications.
• Understand customer integration strategies across multiple applications and identify new business opportunities for ASM.
• Collaborate with senior engineers and customers to align on technology roadmaps, process flows, and strategic inflection points.
• Proactively resolve technical issues and develop solutions that enhance ASM’s market position.
• Partner with customers to define process and integration requirements.
• Generate and present technical documentation, reports, and presentations to customer leadership and internal business units.
• Provide mentorship and guidance to junior engineers.

What we are looking for

• Master’s or Ph.D. in Material Science, Chemical Engineering, Physics, or a related technical discipline.
• In-depth work experience in thin-film deposition or related semiconductor processes, preferably within an OEM capital equipment company.
• Proven ability to build trusted partnerships with customers and internal stakeholders.
• Strong customer-focused mindset with a results-driven approach.
• Excellent verbal and written communication skills in both Korean and English, with the ability to present technical and strategic content to diverse audiences.
• Proficiency in Microsoft Office Suite, especially Excel and PowerPoint.
• Demonstrated leadership in team environments, with the ability to supervise and inspire others.
• Willingness to work in a cleanroom environment while adhering to safety protocols and wearing appropriate PPE.

Job's mission

As a Field Process Engineer at ASM, you’ll be at the heart of customer innovation—driving process excellence and enabling next-gen semiconductor technologies. You’ll work directly with customers to optimize tool performance and ensure ASM solutions meet their evolving needs. This role is a key technical interface, bridging customer teams and ASM’s global expertise to deliver outstanding results.

What you will be working on

• Serve as the primary on-site contact for customer process support, troubleshooting, and escalation resolution.
• Lead equipment qualification during installation start-up, ensuring customer specifications, timelines, and ASM budgets are met.
• Monitor and trace tool performance through installation, start-up, and warranty phases, driving containment and long-term solutions.
• Design and conduct experiments with customers to support development, continuous improvement, and troubleshooting.
• Share technical insights and lessons learned across ASM’s key account and Global Sales and Services teams.
• Communicate effectively via phone, email, and presentations to ensure consistent follow-up with stakeholders.
• Build long-term customer relationships by anticipating future needs and delivering sustainable solutions.
• Continuously improve the customer experience through team collaboration, process refinement, and support tool development.

What we are looking for

• MS or Ph.D. in Material Science, Chemical Engineering, or Physics.
• At least 10 years of experience in semiconductor process or equipment engineering.
• Hands-on experience with deposition tools and deep expertise in a specific process area.
• Strong English and Korean communication skills, both verbal and written.
• Willingness to travel up to 25%, including extended periods for training and customer engagement.