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    • 1. 发明授权
    • Comprehensive process for low temperature epitaxial growth
    • 低温外延生长的综合工艺
    • US5378651A
    • 1995-01-03
    • US56697
    • 1993-04-30
    • Paul D. AgnelloDetlev A. GruetzmacherTung-Sheng KuanThomas O. Sedgwick
    • Paul D. AgnelloDetlev A. GruetzmacherTung-Sheng KuanThomas O. Sedgwick
    • C30B25/02H01L21/205H01L21/203
    • C30B29/06C30B25/02H01L21/02381H01L21/02532H01L21/02576H01L21/0262H01L21/02636
    • A system and method for growing low defect density epitaxial layers of Si on imperfectly cleaned Si surfaces by either selective or blanket deposition at low temperatures using the APCVD process wherein a first thin, e.g., 10 nm, layer of Si is grown on the surface from silane or disilane, followed by the growing of the remainder of the film from dichlorosilane (DCS) at the same low temperature, e.g., 550.degree. C. to 850.degree. C. The subsequent growth of the second layer with DCS over the first layer, especially if carried out immediately in the very same deposition system, will not introduce additional defects and may be coupled with high and controlled n-type doping which is not available in a silane-based system. Further, in order to achieve an optimal trade-off between the need for an inert ambience to promote silane reaction at low temperature and the need for a hydrogen ambience to prevent surface oxidation from inadvertant residual impurities, depositions are carried out in an ambience composed primarily of He but always containing some H.sub.2. Also, the relative deposition rates on a patterned surface of polycrystalline Si on insulator areas and single crystal Si on single crystal seed areas, when using the reactant silane, are dependent on the temperature of deposition and the relative concentrations of hydrogen and inert gas, e.g., helium, in the ambient gas, and can be controlled by regulating these parameters.
    • 通过使用APCVD工艺在低温下通过选择性或覆盖沉积在不完全清洁的Si表面上生长Si的低缺陷密度外延层的系统和方法,其中在表面上生长第一薄例如10nm的Si层, 硅烷或乙硅烷,然后在相同的低温(例如550℃至850℃)下从二氯硅烷(DCS)中生长剩余的膜。随后在第一层上用DCS生长第二层, 特别是如果在相同的沉积系统中立即进行,则不会引入额外的缺陷,并且可能与在硅烷系统中不可用的高且受控的n型掺杂相结合。 此外,为了在惰性气氛促进低温下的硅烷反应的需要和氢气氛的需要之间实现最佳的权衡,以防止表面氧化从不经意的残留杂质,沉积在主要组成的环境中进行 他总是含有一些H2。 此外,当使用反应物硅烷时,在单晶种子区域上的多晶Si绝缘体区域和单晶Si的图案化表面上的相对沉积速率取决于沉积温度和氢气和惰性气体的相对浓度,例如 ,氦气,在环境气体中,并且可以通过调节这些参数来控制。
    • 2. 发明授权
    • Comprehensive process for low temperature SI epit axial growth
    • 低温SI的轴向生长综合过程
    • US5227330A
    • 1993-07-13
    • US785731
    • 1991-10-31
    • Paul D. AgnelloTung-Sheng KuanThomas O. Sedgwick
    • Paul D. AgnelloTung-Sheng KuanThomas O. Sedgwick
    • C30B25/02H01L21/205
    • C30B29/06C30B25/02H01L21/02381H01L21/02532H01L21/02576H01L21/0262H01L21/02636
    • A system and method for growing low defect density epitaxial layers of Si on imperfectly cleaned Si surfaces by either selective or blanket deposition at low temperatures using the APCVD process wherein a first thin, e.g., 10 nm, layer of Si is grown on the surface from silane or disilane, followed by the growing of the remainder of the film from dichlorosilane (DCS) at the same low temperature, e.g., 550.degree. C. to 850.degree. C. The subsequent growth of the second layer with DCS over the first layer, especially if carried out immediately in the very same deposition system, will not introduce additional defects and may be coupled with high and controlled n-type doping which is not available in a silane-based system. Further, in order to achieve an optimal trade-off between the need for an inert ambience to promote silane reaction at low temperature and the need for a hydrogen ambience to prevent surface oxidation from inadvertant residual impurities, depositions are carried out in an ambience composed primarily of He but always containing some H.sub.2. Alternatively, instead of using He for H.sub.2 as the primary carrier gas when depositing Si from silane at low temperatures, DCS with a diborane additive may be used instead of silane in the normal hydrogen carrier. This modification permits DCS to be used in atmospheric pressure processes for Si deposition at low temperatures, which conventionally deposit Si selectively, to deposit blanket (non-selective) Si films over insulator and Si areas, and particularly such areas on a patterned wafer. Because the Si deposition rate is enhanced when diborane is added, significant non-selective deposition rates can occur down to 550.degree. C.
    • 通过使用APCVD工艺在低温下通过选择性或覆盖沉积在不完全清洁的Si表面上生长Si的低缺陷密度外延层的系统和方法,其中在表面上生长第一薄例如10nm的Si层, 硅烷或乙硅烷,然后在相同的低温(例如550℃至850℃)下从二氯硅烷(DCS)中生长剩余的膜。随后在第一层上用DCS生长第二层, 特别是如果在相同的沉积系统中立即进行,则不会引入额外的缺陷,并且可能与在硅烷系统中不可用的高且受控的n型掺杂相结合。 此外,为了在惰性气氛促进低温下的硅烷反应的需要和氢气氛的需要之间实现最佳的权衡,以防止表面氧化从不经意的残留杂质,沉积在主要组成的环境中进行 他总是含有一些H2。 或者,代替在低温下从硅烷沉积Si时,He代替H 2作为主要载气,可以使用具有乙硼烷添加剂的DCS代替常规氢载体中的硅烷。 该修改允许DCS用于在低温下通常沉积Si的低温Si沉积的大气压力工艺中,以在绝缘体和Si区域上,特别是在图案化晶片上的这些区域上沉积覆盖层(非选择性)Si膜。 由于当加入乙硼烷时Si沉积速率增加,因此显着的非选择性沉积速率可能下降到550℃。
    • 3. 发明授权
    • Method and apparatus for preventing rupture and contamination of an
ultra-clean APCVD reactor during shutdown
    • 用于在停机期间防止超清洁APCVD反应器破裂和污染的方法和装置
    • US5635242A
    • 1997-06-03
    • US459261
    • 1995-06-02
    • Paul D. AgnelloThomas O. Sedgwick
    • Paul D. AgnelloThomas O. Sedgwick
    • C23C16/44C23C16/455C23C16/00
    • C23C16/45561C23C16/4401C23C16/455
    • A method of maintaining an optimum pressure and purity level in a vessel having an inlet gas flow and an outlet gas flow during shutdown of the vessel that prevents imploding of the vessel when the inlet and outlet gas flows are discontinued. Gas from the vessel is directed to a containment portion in communication with the vessel. The pressure of the gas in the containment portion is monitored; the containment portion is backfilled with a purified inert gas when the monitored pressure drops to a predetermined lower level; and the containment portion is vented when the monitored pressure rises to a predetermined higher level. Apparatus for maintaining an optimum pressure and purity level in a vessel having an inlet gas flow and an outlet gas flow during shutdown of the vessel that prevents imploding of the vessel when the inlet and outlet gas flows are discontinued is also provided. The apparatus includes a containment portion adjacent to the vessel and in communication with the vessel for containing gas from the vessel, a back-pressure regulator and a conventional regulator for monitoring the pressure of the containment portion, a high-purity inert purge gas source in communication with the conventional regulator, adapted to backfill the containment portion with purified inert gas when the monitored pressure drops to a predetermined lower level, the back-pressure regulator adapted to vent the containment portion when the monitored pressure rises to a predetermined higher level.
    • 在停机时,在容器关闭期间保持具有入口气流和出口气流的容器中的最佳压力和纯度水平的方法,其防止当入口气体和出口气体流过时容器内爆。 来自容器的气体被引导到与容器连通的容纳部分。 监测容纳部分中气体的压力; 当监测压力下降到预定的较低水平时,容纳部分用纯化的惰性气体回填; 并且当所监视的压力上升到预定的较高水平时,所述容纳部分被排出。 还提供了用于在容器停止期间具有入口气体流和出口气体流的容器中保持最佳压力和纯度水平的装置,其防止当入口和出口气体流动时中断容器的内泄。 该装置包括与容器相邻并与容器连通的容纳部分,用于容纳来自容器的气体,背压调节器和用于监测容纳部分的压力的常规调节器,高纯度惰性吹扫气体源 与常规调节器通信,适于当监测压力下降到预定的较低水平时用纯化的惰性气体回填容纳部分,背压调节器适于在监测的压力升高到预定的较高水平时排出容纳部分。
    • 4. 发明授权
    • Method and apparatus for preventing rupture and contamination of an
ultra-clean APCVD reactor during shutdown
    • 用于在停机期间防止超清洁APCVD反应器破裂和污染的方法和装置
    • US5487783A
    • 1996-01-30
    • US227752
    • 1994-04-14
    • Paul D. AgnelloThomas O. Sedgwick
    • Paul D. AgnelloThomas O. Sedgwick
    • C23C16/44C23C16/455C23C16/00
    • C23C16/45561C23C16/4401C23C16/455
    • A method of maintaining an optimum pressure and purity level in a vessel having an inlet gas flow and an outlet gas flow during shutdown of the vessel that prevents imploding of the vessel when the inlet and outlet gas flows are discontinued. Gas from the vessel is directed to a containment portion in communication with the vessel. The pressure of the gas in the containment portion is monitored; the containment portion is backfilled with a purified inert gas when the monitored pressure drops to a predetermined lower level; and the containment portion is vented when the monitored pressure rises to a predetermined higher level. Apparatus for maintaining an optimum pressure and purity level in a vessel having an inlet gas flow and an outlet gas flow during shutdown of the vessel that prevents imploding of the vessel when the inlet and outlet gas flows are discontinued is also provided. The apparatus includes a containment portion adjacent to the vessel and in communication with the vessel for containing gas from the vessel, a back-pressure regulator and a conventional regulator for monitoring the pressure of the containment portion, a high-purity inert purge gas source in communication with the conventional regulator, adapted to backfill the containment portion with purified inert gas when the monitored pressure drops to a predetermined lower level, the back-pressure regulator adapted to vent the containment portion when the monitored pressure rises to a predetermined higher level.
    • 在停机时,在容器关闭期间保持具有入口气流和出口气流的容器中的最佳压力和纯度水平的方法,其防止当入口气体和出口气体流过时容器内爆。 来自容器的气体被引导到与容器连通的容纳部分。 监测容纳部分中气体的压力; 当监测压力下降到预定的较低水平时,容纳部分用纯化的惰性气体回填; 并且当所监视的压力上升到预定的较高水平时,所述容纳部分被排出。 还提供了用于在容器停止期间具有入口气体流和出口气体流的容器中保持最佳压力和纯度水平的装置,其防止当入口和出口气体流动时中断容器的内泄。 该装置包括与容器相邻并与容器连通的容纳部分,用于容纳来自容器的气体,背压调节器和用于监测容纳部分的压力的常规调节器,高纯度惰性吹扫气体源 与常规调节器通信,适于当监测压力下降到预定的较低水平时用纯化的惰性气体回填容纳部分,背压调节器适于在监测的压力升高到预定的较高水平时排出容纳部分。