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    • 1. 发明授权
    • Method of manufacturing semiconductor device
    • 制造半导体器件的方法
    • US5290709A
    • 1994-03-01
    • US865961
    • 1992-04-09
    • Akira Sato
    • Akira Sato
    • H01L21/265H01L21/266H01L21/426
    • H01L21/266Y10S148/076Y10S148/082Y10S148/083
    • According to the present invention, in the ion implantation step in manufacturing a semiconductor device, a resist of a resist pattern formed on a portion of a semiconductor wafer is removed from the outer peripheral portion of the semiconductor wafer, and ion implantation is performed through the resist pattern.Since the resist is removed from the outer peripheral portion, a contact portion between a semiconductor wafer fixing portion of an ion implantation unit and the semiconductor wafer is conductive. Therefore, charges generated by the ion implantation escape from the wafer fixing portion, and the semiconductor wafer is not charged, thereby preventing electrostatic breakdown.
    • 根据本发明,在制造半导体器件的离子注入步骤中,从半导体晶片的外周部分去除形成在半导体晶片的一部分上的抗蚀剂图案的抗蚀剂,并且通过 抗蚀图案 由于抗蚀剂从外周部分去除,离子注入单元的半导体晶片固定部分和半导体晶片之间的接触部分是导电的。 因此,由离子注入产生的电荷从晶片固定部分逸出,并且半导体晶片不被充电,从而防止静电击穿。
    • 2. 发明授权
    • Double-implant process for forming graded source/drain regions
    • 用于形成分级源极/漏极区域的双注入工艺
    • US4801555A
    • 1989-01-31
    • US3176
    • 1987-01-14
    • Patrick J. HollyLouis C. ParrilloFrank K. Baker
    • Patrick J. HollyLouis C. ParrilloFrank K. Baker
    • H01L21/265
    • H01L21/26513Y10S148/082Y10S148/083
    • A process for forming graded source/drain regions in semiconductor devices involves two ion implantation steps and an optional drive-in step. The first implantation is a low dose implant with high energy and/or low mass ions to form the deeper grading region. The second implant is a high does implant with low energy and/or high mass ions to form the shallower, lower resistivity source/drain region. Without the optional drive-in step, virtually no lateral grading takes place, resulting in little encroachment of the grading region under the gate. The use of a drive-in step between the two implant steps causes diffusion of the grading dopant, which increases the grading both laterally and vertically, resulting in better breakdown and capacitance characteristics, but increased encroachment under the gate. The present invention allows control over the lateral and vertical grading separately to optimize the trade-offs for a particular application.
    • 用于在半导体器件中形成分级源极/漏极区域的方法包括两个离子注入步骤和可选的驱入步骤。 第一次植入是具有高能量和/或低质量离子的低剂量植入物以形成较深的分级区域。 第二种植入物是具有低能量和/或高质量离子的植入物,以形成较浅的较低电阻率源极/漏极区域。 没有可选的驱动步骤,几乎没有发生横向分级,导致栅极下方的分级区域几乎不受侵蚀。 在两个植入步骤之间的驱动步骤的使用导致分级掺杂剂的扩散,这增加了横向和垂直的分级,导致更好的击穿和电容特性,但增加了栅极下的侵蚀。 本发明允许单独控制横向和垂直分级以优化特定应用的权衡。