KSPE 포스터 실리콘 웨이퍼 Silicon Wafer EDM Ceramic elsevier Soda-lime micro 학술대회 춘계 유리질 탄소 PRESM2025 AMT Conference 2025 Silicon international journal of advanced manufacturing technology 춘계학술대회 Glassy Carbon cemented carbide GC 2024 한국정밀공학회 machining ZrO2 JKSPE Microgrinding DISCRIM Soda Lime zirconia VC Materials & Design 실리콘 Micro grinding Autumn edge IJAMT Characteristic PRESM 2018 유리질탄소 정밀공학회 WC Vitreous Carbon