About HIDAI HIROFUMI
About 千葉大 大学院工学研究院
About laser beam drilling
About aspect ratio
About printed board
About via hole
About condenser lens
About focal point
About light propagation
About energy density
About internal surface
About optical reflection
About speedup
About pore
About drilling (cutting)
About precision machining
About improvement of efficiency
About high aspect ratio
About modification
About via hole
About 曲がり穴
About 微細穴あけ
About Special machining
About Applications of lasers
About 高能率
About 穴あけ加工
About 工具
About 活用
About ポイント
About レーザ