Joon Park Email & Phone Number

Fremont, Ca

• Served as a Sr. lapping & polish process engineer to support the Lapping & Polish processes to meet the thickness target and uniformity criteria and insure the high product yield after demounting. Also, manage continuous wafer breakage & cleanliness improvement, and cost reduction activities by in-house slurry development and chemical saving by metal lift-off process development. • Developed the batch processes of lapping & polish process by custom-made Lapmaster tool to increase the throughput by 300% and identifying the critical THK & uniformity control parameter, such as photo resist baking Temp., new bonding wax selection / coating /bonding processes & setting the Spec. & SPC control limit to monitor in line. • Developed the 3-inch wafer bonding and demounting process with new wax to improve the wafer cleanliness and wafer breakage (=improving yield) • Also, fully support Wafer Scanner THK measurement tools, All-Win21 RTA annealing tools, CO2 Snow cleaning, Suss-CTR PR/Wax coating cluster (wafer bonding Prep.), eBeam Metallization tools, Track Metal Lift-off, thin InP wafer demounting/cleaning processes including writing the operation procedures and documentation, and setting the process window & operation criteria, hardware/fixture modification and back-up for scribe and cleave operation.• Implemented microscope inspection (VI) after demounting the wafer and feedback to the Fab. for the reject wafers and FA and CA on customer defects such as identifying root-cause of the 45-degree angle scratch, series of tester probe mark damage, and no die identification number problem.

• Served as Principal Substrate development engineer to define Sub. quality criteria insuring high product yield and to manage continuous quality & cleanliness improvement, and cost reduction activities with Glass/Nickel Plated Sub. Suppliers & internal media engineering team. • Responsible for supplier quality management of new products in four suppliers as well as designing & validating test methods and driving corrective actions and following up FA on HDD failure for root-cause analyses.• Qualified two 2nd source suppliers and established audit procedures, monitored daily performance through SPC, scheduled audits, and managed all QMP documents including ISO 9000, ECO, ECN, RMA, SCAR, SPR, Gauge R&R and prepared weekly performance report and communicated to the management. • Studied substrate surface characterization to TDH/TFC and managed worldwide technical support on Candela (surface metrology inspection tool) recipes & other IQC inspection gauges and correlation work to maintain high quality control with suppliers & internal.• Dispatched to oversee supplier operation sites to involve in correcting urgent Quality issues and process optimization.• Managed to eliminate critical Quality problem on schedule.

• Served as Sr. Staff mechanical texture process engineer.• Developed new textured media product launch on schedule.• Performed FMEA, DOE runs, SPC implementation, and continuous improvement techniques to evaluate process capabilities; various types of key component selection runs, process parameter characterization, optimization runs and followed-up customer return corrective action plan and Failure Analysis project involving multiple departments.• Introduced new process with non-woven tapes with PM diamonds to achieve overall base yield of 85% and in charge of releasing new product, ECN, ECO and Spec. to manufacturing.• Experienced scale-up manufacturing (tools & processes) from small to high volume operation and ramp up in other US operation site. • Supported daily numerous automated mechanical & laser texture tools and metrology tools for manufacturing.• Monitored daily manufacturing Yields & Cpk and managed continuous process and tools improvement activities.• Introduced new measurement tools (Candela and HDI) with developing key inspection criteria & procedure (recipes) to ensure high level of product quality standard.• Set new laser texture process Qual. criteria, defined bump measurement method, and performed process capability.• Established inspection criteria and procedure and validated test methods for incoming materials • Qualified primary & 2nd source for key CMP materials; Mono, Poly & PM -crystalline diamond, colloidal silica, coolants, woven/non-woven tapes and set new Quality STD with better business position. Provided BOM for QA, Purchasing, Management.• OSHA 18001 Risk assessment certified and participated as safety team to involve in risk calculation.

• Served as senior Substrate grinding R/D engineer.• Developed the new cost efficient grinding processes in System Seiko & Speedfam Auto Grinders and involved in tool selection and plant layout. • Performed SPC and DOE run and executed process optimization and throughput improvement trial run.• Worked on the productivity & quality improvement activities such as cycle time improvement, 1-step and 2-step grinding process development and reduction of Flatness, Wavi-Max & contamination defects.

• Served as senior manufacturing engineer and acting manager at Spray Lube/FTP Dept.• Supported, upgraded & installed, and retrofit the automated production systems, Centaur (= = FTP & Clean-Wipe).• Managed 14 technicians to optimize the Lubrication, Clean-Wipe, FTP, AOI and metrology tools.• Interfaced with R&D and Automation Department to ensure smooth transition from pilot line to scale-up manufacturing.• Troubleshoot automated system and tool design issues. Coordinated component outsourcing plans and reduced material lead time by interacting with vendors and suppliers.• Experienced in NPI to manufacturing scale up (tools & processes) operation. Performed floor layout and local technical staff training and interacted with various engineering departments for smooth product transfer to Asia operations with overall base yield of 85%.• Supported the numerous automated equipment & inspection tools & metrology tools (FT-IR and CSS testers)• Designed various hand tools and fixtures to reduce machine conversion setup time by 50%. • Introduced and implemented SPC to manufacturing and DOE for quality continuous improvement projects such as new process development and optimization.• Performed the process characterization study & optimized the existing Lube process & developed new processes for sputter conditions, surface roughness changes, environmental effect, and assignable causes.• Developed and introduced closed loop feedback control Lube solution delivery system, which resulted in an immediate 50% Cpk and 15% tool utilization improvement.• Participated in the ISO 9002 certification. Awarded Certificate of Outstanding Performance.

M.S, Mechanical Engineering

B.S, Mechanical Engineering