박사시험 과목
5월18일(수) : DYN & MFG 17:30~19:30 (112-701)...
기계공학과 박사 시험 일정: 2022.05.16 ~ 5.20 5월16일(월) : HT & CTR 16:00~18:00 (112-701) 5월17일(화) : THD & FLM 16:00~18:00 (112-701) 5월18일(수) : DYN & MFG 17:30~19:30 (112-701) 5월19일(목) : MM 17:30~19:30 (112-701) 5월20일(금) : MTH 13:30~15:30 (112-701) ...
Title: Applied Laser Processing for Semiconductor Fabrication Presenter: Prof. Joonghan Shin (Division of Mechanical Engineering and Automotive Engineering, Kongju National University) Abstract: Over the last ten years, laser processing has played a key role in the fabrication of semiconductor devices. Compared to the conventional heating process using a furnace or a lamp, laser processing has the following unique advantages: (a) local heating is possible with a small beam sot size; (b) raising the temperature of the material beyond its melting point is easily attainable due to high-intensity lasers; and (c) heating of shallow layer of the material just below the surface under the low thermal budget is possible by using an optimal wavelength and an annealing time in the range of milliseconds to nanoseconds. Due to the abovementioned characteristics, laser processing has been widely used in various applications for semiconductor manufacturing. This seminar aims to introduce the major applications (dopant activation, silicidation, void removal, and re-crystallization) of laser processing and the characteristics of laser equipment used for semiconductor manufacturing. ...
Introduction to Korea Space Launch Vehicle-II (Nuri) Korea Space Launch Vehicle-II (KSLV-II) has been developed to launch 1.5 ton mass to Sun Synchronized Orbit. KSLV-II is a three-stage rocket. The first stage is propelled by four 75 ton class liquid rocket engine of which propellants are liquid oxygen...
Nanoscale Biomimetic Materials for Sensor and Actuator Applications Byung Yang Lee School of Mechanical Engineering, Korea University, Seoul, Korea Nanoscale materials have high surface-volume ratio, making them ideal building blocks for sensors and actuators. In particular, starting from very few and simple building blocks such as collagen fibrils, nature easily builds hierarchical and complex supramolecular structures which are often hard to imitate with current top-down microfabrication techniques. Recently, with the development of diverse assembly methods of nanomaterials, we can obtain biomimetic structures with diverse optical, mechanical, and electrical properties using bottom-up approaches. Sometimes, the properties of such biomimetic materials, when exposed to certain physical or chemical stimuli, can change enough to be utilized for sensor or actuator applications. For example, some filamentous viruses can be assembled into colorful films on solid substrates, the colors of which can change when exposed to organic solvents and volatile organic compounds. Also, these same films, when applied with mechanical pressure, can exhibit piezoelectric properties, where mechanical pressure can be transduced to electrical signal, opening a possibility of using these structures as mechanical force sensors. In this talk, we will discuss on the current state of applying nanoscale materials for sensor and actuator application....