Methods for fabricating a metal-oxide-semiconductor device structure
    11.
    发明授权
    Methods for fabricating a metal-oxide-semiconductor device structure 有权
    金属氧化物半导体器件结构的制造方法

    公开(公告)号:US07951660B2

    公开(公告)日:2011-05-31

    申请号:US10703355

    申请日:2003-11-07

    IPC分类号: H01L21/336

    摘要: A method for fabricating a metal-oxide-semiconductor device structure. The method includes introducing a dopant species concurrently into a semiconductor active layer that overlies an insulating layer and a gate electrode overlying the semiconductor active layer by ion implantation. The thickness of the semiconductor active layer, the thickness of the gate electrode, and the kinetic energy of the dopant species are chosen such that the projected range of the dopant species in the semiconductor active layer and insulating layer lies within the insulating layer and a projected range of the dopant species in the gate electrode lies within the gate electrode. As a result, the semiconductor active layer and the gate electrode may be doped simultaneously during a single ion implantation and without the necessity of an additional implant mask.

    摘要翻译: 一种制造金属氧化物半导体器件结构的方法。 该方法包括通过离子注入将掺杂剂物质同时引入覆盖在半导体有源层上的绝缘层和栅电极的半导体有源层中。 选择半导体有源层的厚度,栅电极的厚度和掺杂剂物质的动能,使得半导体有源层和绝缘层中的掺杂剂物质的投影范围位于绝缘层内,并且投影 栅电极中的掺杂物种类的范围位于栅电极内。 结果,半导体有源层和栅电极可以在单个离子注入期间同时掺杂,而不需要另外的注入掩模。

    Shallow trench isolation fill by liquid phase deposition of SiO2
    12.
    发明授权
    Shallow trench isolation fill by liquid phase deposition of SiO2 有权
    浅沟槽隔离填充SiO 2的液相沉积

    公开(公告)号:US07525156B2

    公开(公告)日:2009-04-28

    申请号:US11760477

    申请日:2007-06-08

    IPC分类号: H01L23/58

    摘要: To isolate two active regions formed on a silicon-on-insulator (SOI) substrate, a shallow trench isolation region is filled with liquid phase deposited silicon dioxide (LPD-SiO2) while avoiding covering the active areas with the oxide. By selectively depositing the oxide in this manner, the polishing needed to planarize the wafer is significantly reduced as compared to a chemical-vapor deposited oxide layer that covers the entire wafer surface. Additionally, the LPD-SiO2 does not include the growth seams that CVD silicon dioxide does. Accordingly, the etch rate of the LPD-SiO2 is uniform across its entire expanse thereby preventing cavities and other etching irregularities present in prior art shallow trench isolation regions in which the etch rate of growth seams exceeds that of the other oxide areas.

    摘要翻译: 为了隔离形成在绝缘体上硅(SOI)衬底上的两个有源区,浅沟槽隔离区填充有液相沉积二氧化硅(LPD-SiO 2),同时避免用氧化物覆盖有源区。 通过以这种方式选择性地沉积氧化物,与覆盖整个晶片表面的化学气相沉积氧化物层相比,平坦化晶片所需的抛光显着降低。 另外,LPD-SiO2不包括CVD二氧化硅的生长接缝。 因此,LPD-SiO 2的蚀刻速率在其整个宽度上是均匀的,从而防止存在于现有技术的浅沟槽隔离区域中的空腔和其它蚀刻不规则性,其中生长接缝的蚀刻速率超过其它氧化物区域的蚀刻速率。