Han Chen

Product Scope: Probe Cards, IC Substrates, PCB • LTCC & Photoresist Testing: Developed low-temperature co-fired ceramics (LTCC) processes, optimizing drilling and sintering parameters to improve process stability. • New Ceramic Mechanical Drilling Development: Conducted mechanical drilling tests on novel ceramic materials. • Daisy Chain & Hipot Process Development: Optimized impedance control and high-voltage testing, enhancing package reliability . • New Equipment Introduction & Technology Transfer: Successfully introduced UV laser processing machines & large-scale forming machines, improving production efficiency . • Data Analysis & Quality Control: Utilized MiniTab for Boxplot analysis, reducing test variability. • Customer Certification Sample Production: Managed new material validation and customer sample preparation, facilitating mass production approval.

• Led substrate failure analysis (FA) and drove continuous process improvements. • Designed and executed DOE to resolve mass production anomalies and mitigate process variations. • Established robust process baselines through comprehensive parameter validation on the production floor. • Optimized lithography exposure parameters to ensure high-precision pattern transfer.

Product Scope: Optical Communication Laser Components (2.5G/10G/25G DFB, EML, Tunable Laser) • ESD & EOS Testing: Defined testing standards and ensured product durability. • Outsourced Manufacturing Management: Coordinated with three suppliers, managing production schedules and delivery timelines. • Equipment Calibration & SPC Management: Maintained LIV testing equipment & SPC Charts for stable process control.

Product Scope: DFB, VESCL, pHEMT • Spearheaded process optimization for Optical Communication and RF chips, significantly refining linewidth resolution and photoresist profiles to enhance product reliability performance. • Evaluated and benchmarked advanced lithography and E-Beam equipment ( including Nikon, Canon, JEOL, Vistec, and Cretec) executing rigorous parameter tuning and comprehensive troubleshooting tests.

Product Scope: DFB Laser • HTOL High-Temperature Lifetime Testing: Developed HTOL testing methods, improving product reliability. • Gross Dies Enhancement Project: Optimized wafer processing, increasing die yield by 15%.

• Cleanroom Maintenance & Equipment Operation: Ensured proper functioning and cleanliness of the cleanroom environment, adhering to strict laboratory protocols. • Nanofabrication & Imaging: Operated and maintained E-beam lithography (Ebeam) and scanning electron microscope (SEM) for semiconductor and photonic device fabrication. • Photonic Crystal Fabrication: Designed photonic crystal structures using AutoCAD and implemented fabrication processes. • Micro-PL Spectroscopy Setup: Configured and optimized micro-photoluminescence (Micro-PL) systems for material characterization. • Waveguide Transmission Measurement: Conducted optical transmission measurements for waveguides to analyze optical propagation efficiency. • Optical Simulation & Modeling: Performed optical simulations using RSoft and COMSOL to model and analyze photonic structures.

• Solar Simulation & Optical Characterization: Operated and optimized solar simulators for photovoltaic device testing. • UV-Visible Spectroscopy: Performed absorbance measurements to analyze material optical properties. • IPCE Measurement & Training: Maintained Incident Photon-to-Current Efficiency (IPCE) measurement systems and provided training for new researchers. • Electrochemical Impedance Spectroscopy (EIS): Conducted IV curve, cyclic voltammetry (CV), and AC impedance analyses for device performance evaluation. • Transient Photovoltage & Photocurrent Spectroscopy: Utilized IMVS (Intensity-Modulated Photovoltage Spectroscopy) and IMPS (Intensity-Modulated Photocurrent Spectroscopy) to assess carrier lifetime and charge transport time in solar cells.

M.-H. Mao, C.-H. Chen, et al., “Passivation of CdSe/ZnS QDs via ALD,” PacSurf 2016, Hawaii

(1) Chih-Hung Tsai*, Chih-Han Chen, Yu-Chen Hsiao, Ping-Yuan Chuang “Investigation of Graphene Nanosheets as Counter Electrodes for Efficient Dye- Sensitized Solar Cells” Organic Electronics, February 2015. (2) Chin-Lung Chung, Chih-Han Chen, Chih-Hung Tsai*, Ken-Tsung Wong* “Novel Organic Dyes Containing N-bridged Oligothiophene Coplanar Cores for Dye- Sensitized Solar Cells” Organic Electronics, March 2015. (3) Chih-Hung Tsai*, Chih-Han Chen, Po-Hsi Fei, Yu-Kuei Hsu* “Novel Semiconductor-Liquid Heterojunction Solar Cells Based on Cuprous Oxide and Iodine Electrolyte Electrochimica Acta, June 2015. (4) Der-Ray Huang*, Yan-Jang Jiang, Run-Lin Liou, Chih-Han Chen, Yi-An Chen, Chih- Hung Tsai*,“Enhancing the Efficiency of Dye-Sensitized Solar Cells by Adding Diatom Frustules into TiO2 Working Electrodes” Applied Surface Science, August 2015.