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- W2056547095 abstract "Laser materials processing has been used increasingly over the wide area of electronic industries, especially for drilling microvias in printed circuit boards, and poly-silicon annealing for thin film transistor of liquid crystal display. Intensity distribution of laser beam is usually a non-uniform gaussian profile. Therefore, the demand for uniform intensity distribution is rising rapidly in some applications of heat processing. To obtain higher uniformity, beam homogenizer of a diffractive optical element (DOE) has recently been developed and introduced to some promising applications. Through the improvement of optical design algorithms and micro-fabrication techniques of a phase pattern of DOE, it becomes possible to convert a non-uniform gaussian distribution not only into a simple distribution like a square and a line but also into a complicated distribution like a distribution of printed circuit pattern. In this study, we introduce a design and fabrication result of beam shaper of DOE that can convert a gaussian distribution into the distribution of a printed circuit pattern, and present the possibility and the point at issue of new laser material processing by using such optics." @default.
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- W2056547095 date "2004-10-08" @default.
- W2056547095 modified "2023-09-25" @default.
- W2056547095 title "<title>Characteristic of diffractive optical element for arbitrary pattern beam shaping</title>" @default.
- W2056547095 doi "https://doi.org/10.1117/12.596369" @default.
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