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    • 1. 发明申请
    • LASER PROCESSING METHOD
    • 激光加工方法
    • US20110108532A1
    • 2011-05-12
    • US12907349
    • 2010-10-19
    • Kosuke KurachiMasahiko KubotaAkihiko OkanoAtsushi Hiramoto
    • Kosuke KurachiMasahiko KubotaAkihiko OkanoAtsushi Hiramoto
    • B23K26/38
    • B23K26/18B23K26/361B23K26/40B23K26/53B23K26/60B23K2103/50H01L21/268
    • Provided is a laser processing method capable of improving precision of a processing shape and degree of freedom of the processing shape. When a recess portion is formed in a substrate (W) which is an object to be processed, an inner portion of the substrate (W) is scanned with a condensing point (LS1) of modification laser light (L1) which is first laser light to form a modified layer (Wr) which becomes a boundary of a laser processing region (R1) in a position corresponding to a bottom part of the recess portion (modified layer forming step). Next, a surface (Wa) of the substrate (W) is irradiated with condensed processing laser light which is second laser light to remove and process the laser processing region (R1) defined by the modified layer (Wr), to thereby form the recess portion (removing/processing step).
    • 提供了能够提高加工形状的精度和加工形状的自由度的激光加工方法。 当在作为被加工物的基板(W)上形成有凹部时,用作为第一激光的变形激光(L1)的聚光点(LS1)扫描基板(W)的内部, 形成在与凹部(修饰层形成工序)的底部对应的位置成为激光加工区域(R1)的边界的改质层(Wr)。 接下来,用作为第二激光的聚光处理用激光照射基板(W)的表面(Wa),以去除并处理由改性层(Wr)限定的激光加工区域(R1),从而形成凹部 部分(去除/处理步骤)。