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