Journal of the Japan Society for Abrasive Technology
Online ISSN : 1880-7534
Print ISSN : 0914-2703
ISSN-L : 0914-2703
Volume 67, Issue 11
Displaying 1-1 of 1 articles from this issue
  • 4th Report : High-speed and high-stability slicing by nanosecond laser
    Yohei YAMADA, Satomi KOMATSUZAKI, Taku KIKUCHI, Junichi IKENO
    2023Volume 67Issue 11 Pages 600-605
    Published: November 01, 2023
    Released on J-STAGE: May 01, 2024
    JOURNAL FREE ACCESS

    We investigated the use of a short-pulse laser to achieve high-speed and high-stability laser slicing of SiC. The short-pulse laser was effective in achieving high-speed slicing by promoting internal modification through heat effects and by expanding the area of cleavage extension. However, excessive cleavage linkage along the off-angle was shown to cause instability of peeling. To achieve higher speed and stable peeling, we proposed a method combining control of the laser irradiation interval with control of the laser scanning direction to achieve uniform cleavage linkage. We succeeded in controlling the peeled surface structure to have step-like unevenness along the off-angle in an orderly manner, and also in suppressing excessive cleavage linkage. Based on these basic experiments, we successfully achieved slicing of a 2-inch wafer. The surface was controlled to have a uniform step structure. The processing speed was approximately 24 times faster than using an ultrashort-pulse laser, achieving both high speed and high stability.

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