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NSYSU Third-Year Student’s Research Published in Internationally Renowned Journal
Publish date : 2017-07-20
When NSYSU Department of Materials and Optoelectronic Engineering third year student Yu-Chieh Chien applied for admission into NSYSU three years ago, he only made the waiting list. After he had successfully entered NSYSU, he was supervised by Professor Ting-Chang Chang and is inspired by Professor Chang to find the fun in the experiments and to devote himself to research. Chien’s research paper, entitled “Role of H2O Molecules in Passivation Layer of a-InGaZnO Thin Film Transistors,” has recently been accepted to the renowned journal in the field of electronics, the IEEE Electron Device Letters. This achievement made Chien the youngest first author to be published in a SCI journal in NSYSU’s records.

Chien mentioned that his family gave him a lot of freedom in choosing to do what he wants to do. “My parents will not force me to study medicine just because my father is a doctor; I think this kind of family education has much impact on me,” Chien said. Chien recalls that when he entered junior high school, he became obsessed with online games, yet his parents did not forbid him from playing the games. Instead, Chien’s parents told him that as long as he can keep his grades above a certain level, he can do whatever he wants to do. At the time, Chien simply studied in order to play computer games, but he eventually entered a video game contest with classmates and even won the first place.

When Chien got the grades of the General Scholastic Ability Test, he applied for admission to NSYSU Department of Materials and Optoelectronic Engineering, Department of Physics, and Department of Mechanical and Electro-Mechanical Engineering. "However, I only made the waiting list, and am far from the top of the list,” Chien said. Chien did not see any hope when preparing for the Advanced Subjects Test and he thought he was luckily admitted to NSYSU Department of Materials and Optoelectronic Engineering. After he entered NSYSU, he started to have an initial knowledge to “what is research” and became greatly interested in researching after he sat in on Professor Chang’s course. Chien joined Professor Chang’s lab when entering the third year of his studies.

“Professor Chang always uses easy metaphors to help us understand the difficult knowledge, which was very surprising to me at the time,” Chien stated. Chien indicated that all the performances of the lab are the result of the effort and time that Professor Chang devoted; Professor Chang has collected numerous research resources and provided an excellent research environment for the students. Professor Chang has established close research collaboration relationships with TSMC, UMC, AU Optronics, and Innolux, combining academic research with practicality to resolve problems encountered in the industry. “The experience I’ve gained in the process of submitting the paper is more valuable than its acceptance,” Chien stated. Chien hopes to become an excellent researcher or developing engineer to impact the society with academic knowledge.

Chien’s journal paper is entitled: “Role of H2O Molecules in Passivation Layer of a-InGaZnO Thin Film Transistors.” The Amorphous Indium-Gallium-Zinc Oxide Thin Film Transistors, a-IGZO TFT, is a recently popular material of research and is seen as the top material for the development of the next generation of the display device. The material is very sensitive to H2O ambient; to reduce the impact of H2O ambient on the characteristics of the material, a passivation layer must be applied. However, the industry’s main concern is how to optimize the design of the passivation layer. Chien researched how H2O molecules exist in the internal mechanism of the passivation layer, which contributes to a more comprehensive understanding of the reasons for the problem and thus can optimize the design of the layer.
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