Abstract ▼

Safety and reliability are the major issues for high-performance electronic devices working in the space environment due to harsh working and environmental conditions. Therefore, it is matter of prime importance to consider the working environment of these devices at the fabrication and working stag

Safety and reliability are the major issues for high-performance electronic devices working in the space environment due to harsh working and environmental conditions. Therefore, it is matter of prime importance to consider the working environment of these devices at the fabrication and working stage. GaN-based electronic devices such as LDs, LEDs, GaN gas sensors, HEMT, wireless communication and signaling devices are becoming popular for lighting, sensing, switching, signaling, and communication purposes. These devices are fabricated on a substrate such as sapphire or silicon. Defects such as dislocations and cracks are formed in the GaN because of high lattice and thermal mismatch between the GaN and the substrate. These defects can become a major issue for reliability of these devices. This research will be focused on studying the mechanics of defect generation in GaN layer using multi-scale simulation technique so that defect density can be reduced which can contribute in improving the reliability of these devices in harsh working environments that arise in aerospace applications. Multiscale research comprises of ab-initio, molecular dynamics, dislocation dynamics and the study of continuum level will be employed to carry out to understand the defect generation process, and its effect on the performance and reliability of these devices. Proper considerations of harsh working environment for these devices will be taken into account while conducting theoretical and simulation based studies of the defect mechanics at various scales. Appropriate design considerations and device fabrication routes will be suggested based on the multi-scale studies carried out during this research.

(출처 : SUMMARY 5p)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 요 약 문 ... 4
• SUMMARY ... 5
• CONTENTS ... 5
• 목차 ... 6
• 제 1 장 연구개발과제의 개요 ... 7
• 제 1 절 연구개발의 목적 ... 7
• 제 2 절 연구개발의 필요성 ... 10
• 제 3 절 우주환경 ... 14
• 제 2 장 국내외 기술개발 현황 ... 22
• 제 1 절 국내외 시장동향 및 시장규모 ... 22
• 제 2 절 국내외 연구동향 및 기술개발 현황 ... 23
• 제 3 장 연구개발수행 내용 및 결과 ... 25
• 제 1 절 수행결과 개요 ... 25
• 제 2 절 이론적 접근 방법 ... 30
• 제 3 절 연구결과 ... 41
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 66
• 제 1 절 연구개발목표의 달성도 ... 66
• 제 2 절 관련분야의 기술발전에의 기여도 ... 72
• 제 5 장 연구개발결과의 활용계획 ... 74
• 제 1 절 추가 연구내용 ... 74
• 제 2 절 참고그림 및 부연설명 ... 74
• 제 6 장 연구개발과정에서 수집한 해외과학기술정보 ... 76
• 제 7 장 국가과학기술종합정보서비스 등록 연구시설·장비 ... 76
• 제 8 장 참고문헌 ... 76
• 끝페이지 ... 76