Mohammed Sajahan Allapitchai

• Lead overall site operations and service delivery, overseeing equipment installation, qualification, startup, maintenance readiness, and operational support for advanced semiconductor manufacturing programs.
• Managed day-to-day site business operations, overseeing budgeting, cost control, finance coordination, HR administration, logistics, supply chain, procurement, inventory, and facility-related requirements to align operations with business goals..
• Manage site-level budget planning, expenditure tracking, resource forecasting, vendor coordination, spare-parts planning, and operational cost control in alignment with business objectives.
• Drove customer service excellence and operational performance by managing technical escalations, service priorities, equipment readiness, and cross-functional actions, ensuring timely issue resolution and enhanced client satisfaction.
• Coordinate regional and global technical resources for equipment installation, commissioning, factory acceptance testing, troubleshooting, upgrades, and field service activities across multiple locations.
• Served as key site interface with regional and corporate functions, coordinating HR, finance, supply chain, logistics, compliance, commercial, and administrative activities, facilitating effective site operations and collaboration.

• Managed Diffusion 1 process and equipment, covering LPCVD, backend curing, metallization, RTA, and metrology systems in high-volume 8-inch wafer fabrication.
• Enhanced process stability and defect performance through SPC monitoring, process optimization, troubleshooting, and chamber seasoning.
• Facilitated new equipment installation and qualification, overseeing FAT, equipment buy-off, process qualification, and production release.
• Collaborated with equipment, manufacturing, quality, and maintenance teams to resolve process and equipment issues, ensuring consistent production performance.

• Managed maintenance and performance of diffusion equipment for TEL Alpha 303i and Indy Plus systems in high-volume wafer fabrication, ensuring optimal operational conditions.
• Improved equipment uptime from 72% to 78% through preventive maintenance improvement, troubleshooting, fault analysis, and equipment optimization.
• Managed equipment preventive and corrective maintenance, troubleshooting recurring failures and implementing long-term corrective actions to improve reliability.
• Developed and improved maintenance procedures and troubleshooting guides, reducing repair time and improving equipment recovery.
• Supported new equipment installation and startup, including equipment qualification, FDC validation, particle characterization, MES integration, and production release.
• Collaborated with process, manufacturing, vendors, and maintenance teams to enhance equipment availability and reliability, directly contributing to improved production performance.

• Led the Diffusion/Thermal Equipment section, managing 9 engineers and 25 technicians supporting RTP, annealing, CVD/Poly deposition, EPI, and metrology equipment.
• Managed equipment maintenance and reliability efforts, achieving 92% equipment availability across production tools.
• Improved Poly deposition performance, reducing chip rejection from 28% to 10% through equipment and process improvements.
• Reduced CVD preventive maintenance cycle time from 27 hours to 21 hours, improving equipment availability and production capacity.
• Achieved 85% reduction in quartz-related expenditures through component recovery and lifetime-extension initiatives.
• Led equipment modifications and reliability improvements that extended deposition runtime from 45 to 80 hours, increasing chamber utilization and reducing maintenance frequency.
• Supported equipment upgrades and troubleshooting, utilizing 5S, 8D, FMEA, and root cause analysis for continuous improvement.

• Executed preventive/corrective maintenance, troubleshooting, and calibration services on 20+ testers/handlers (TMT Credence, MUL 85XX), maintaining 95% equipment availability for high-mix assembly.
• Led troubleshooting efforts for equipment malfunctions, ensuring minimal downtime in production processes.
• Mentored junior technicians on best practices for equipment maintenance and safety protocols.
• Developed and implemented preventive maintenance schedules to enhance machinery reliability and performance.

Expected April 2027