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    • 3. 发明授权
    • Semiconductor device having a trench isolation and method of fabricating the same
    • 具有沟槽隔离的半导体器件及其制造方法
    • US07494883B2
    • 2009-02-24
    • US11543213
    • 2006-10-05
    • Toshiaki IwamatsuTakashi IpposhiTakuji MatsumotoShigenobu Maeda
    • Toshiaki IwamatsuTakashi IpposhiTakuji MatsumotoShigenobu Maeda
    • H01L21/336
    • H01L21/2652H01L21/76264H01L21/76283H01L21/84H01L27/1203
    • The present invention provides a method of fabricating a semiconductor device in which deterioration in a transistor characteristic is prevented by preventing a channel stop implantation layer from being formed in an active region. A resist mask is formed so as to have an opening over a region in which a PMOS transistor is formed. Channel stop implantation is performed with energy by which ions pass through a partial isolation oxide film and a peak of an impurity profile is generated in an SOI layer, thereby forming a channel stop layer in the SOI layer under the partial isolation oxide film, that is, an isolation region. An impurity to be implanted here is an N-type impurity. In the case of using phosphorus, its implantation energy is set to, for example, 60 to 120 keV, and the density of the channel stop layer is set to 1×1017 to 1×1019/cm3. At this time, the impurity of channel stop implantation is not stopped in the SOI layer corresponding to the active region.
    • 本发明提供一种制造半导体器件的方法,其中通过防止在有源区中形成沟道阻挡注入层来防止晶体管特性的劣化。 形成抗蚀剂掩模,以便在形成PMOS晶体管的区域上具有开口。 通过离子通过部分隔离氧化膜的能量进行沟道停止注入,在SOI层中产生杂质分布的峰,从而在部分隔离氧化膜的SOI层内形成沟道停止层,即 ,隔离区域。 这里要植入的杂质是N型杂质。 在使用磷的情况下,其注入能量设定为例如60〜120keV,通道阻挡层的密度为1×10 17〜1×10 19 / cm 3。 此时,沟道停止注入的杂质在与有源区对应的SOI层中不停止。