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    • 3. 发明授权
    • Method of fabricating a semiconductor device
    • 制造半导体器件的方法
    • US5202277A
    • 1993-04-13
    • US918933
    • 1992-07-22
    • Shuichi KameyamaAtsushi HoriHiroshi ShimomuraMizuki Segawa
    • Shuichi KameyamaAtsushi HoriHiroshi ShimomuraMizuki Segawa
    • H01L21/28H01L21/336
    • H01L29/6659H01L21/28114
    • A method of fabricating a semiconductor device having gate-drain overlap MOSFETs in which side surfaces of upper portions of gate lines are anisotropically etched using a buffer film as an etch stop is disclosed. An insulating film as a gate insulator is formed on a semiconductor layer of a first conductivity type. A first conductive film is formed on the gate insulator. A buffer film having openings in gate line regions is formed on the first conductive film. A second conductive film is formed on the buffer film. The second conductive film is patterned into wiring shape to form upper portions of gate lines covering the openings of the buffer film. Ions of a second conductivity type are implanted into the semiconductor layer using the upper portions of the gate lines as an implant mask to form sources and drains in the semiconductor layer. Sidewall spacers are formed on the sides of the upper portions of the gate lines. The buffer film and the first conductive film are etched using the upper portions of the gate lines and the sidewall spacers as an etching mask to form under portions of the gate lines.
    • 公开了一种制造具有栅极 - 漏极重叠MOSFET的半导体器件的方法,其中栅极线的上部的侧表面使用缓冲膜作为蚀刻停止点进行各向异性蚀刻。 作为栅极绝缘体的绝缘膜形成在第一导电类型的半导体层上。 在栅极绝缘体上形成第一导电膜。 在第一导电膜上形成在栅线区域具有开口的缓冲膜。 在缓冲膜上形成第二导电膜。 将第二导电膜图案化成布线形状,以形成覆盖缓冲膜的开口的栅极线的上部。 使用栅极线的上部作为注入掩模将第二导电类型的离子注入到半导体层中,以在半导体层中形成源极和漏极。 侧壁间隔件形成在栅极线的上部的侧面上。 使用栅极线和侧壁间隔物的上部作为蚀刻掩模蚀刻缓冲膜和第一导电膜,以在栅极线的一部分形成。
    • 4. 发明授权
    • Method for making semiconductor transistor device by implanting punch
through stoppers
    • 通过将止动器植入穿孔来制造半导体晶体管器件的方法
    • US5320974A
    • 1994-06-14
    • US31761
    • 1993-03-15
    • Atsushi HoriMizuki SegawaHiroshi ShimomuraShuichi Kameyama
    • Atsushi HoriMizuki SegawaHiroshi ShimomuraShuichi Kameyama
    • H01L21/265H01L21/336H01L29/10H01L21/266
    • H01L29/66492H01L21/26586H01L29/1083H01L29/6659H01L29/665
    • Insulating films formed on side walls of a gate electrode are removed for a self-alignment to selectively implant impurities only into end portions of a source region and a drain region. Therefore, p.sup.+ -type semiconductor regions are selectively formed only on sides near a channel region of the source and the drain regions. A punch through of the source or drain region is prevented by the p.sup.+ -type semiconductor regions controlling an inversion threshold voltage. Therefore, the impurity concentration of the p-type substrate can be settled low, and the semiconductor transistor device can be miniaturized without increasing a parasitic junction capacitance. Moreover, since the impurity concentration in the channel region is ununiform, a drivability of the transistor can be increased. As a result, a semiconductor transistor device with a high withstand voltage and a high drivability in which the inversion threshold voltage can be easily controlled, and a method for producing the same are provided.
    • 去除形成在栅电极的侧壁上的绝缘膜以进行自对准以选择性地将杂质仅仅植入源极区域和漏极区域的端部。 因此,仅在源极和漏极区的沟道区域附近的侧面选择性地形成p +型半导体区域。 通过控制反转阈值电压的p +型半导体区域防止源区或漏区的穿通。 因此,p型衬底的杂质浓度可以很低,并且半导体晶体管器件可以小型化而不增加寄生结电容。 此外,由于沟道区域中的杂质浓度不均匀,所以可以提高晶体管的驱动能力。 结果,提供了具有高耐受电压和高驱动能力的半导体晶体管器件,其中可以容易地控制反转阈值电压及其制造方法。