Precision micro drilling with copper vapor lasers

Abstract

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A review of modern advancements in micro drilling techniques

“…These drawbacks leaded to a limited usage of these technology. In the next decade, some of the drawbacks were solved by the advancement of low-power waveguide excimer lasers and frequency quadrupled Nd-YAG lasers [81][82][83], however, were limited to non-metallic materials and larger diameter of the holes. In this period some other non-conventional micro drilling technique such as EDM was reported to be used for micro drilling.…”

“…Excimer laser based drilling on polymers and PCBs were reported to be popular among the researchers in this period [83,[88][89][90], while facing ongoing problems of micro drilling in metals. In 1999, Lazare [91] introduced UV laser based micro drilling and achieved aspect ratio as high as Φ/d ≈600, in a variety of materials including PMMA, PC, PET, PI, PS and PEEK.…”