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    • 4. 发明授权
    • Method of monitoring emissivity
    • 监测发射率的方法
    • US06177127B1
    • 2001-01-23
    • US09191236
    • 1998-11-13
    • Ronald A. WeimerAvishai KeptenMichael Sendler
    • Ronald A. WeimerAvishai KeptenMichael Sendler
    • C23C1646
    • H01L28/84C23C16/24C23C16/56H01L21/02532H01L21/02667H01L21/2022H01L21/3205H01L22/26Y10S148/003Y10S148/122Y10S438/964
    • A method for reliably forming polysilicon of a desired surface roughness includes providing a layer of doped or undoped amorphous silicon on a substrate and heating said substrate while monitoring the emission of said substrate and comparing the monitored emission with an expected emission attributable to the heating regime employed. An increase in the monitored emission not attributable to the heating regime signals a transition of the layer of amorphous silicon to rough polysilicon. A decrease in the monitored emission not attributable to the heating regime signals a transition to smooth polysilicon. The increases and decreases in the monitored emission can be used to end the heating regime at the time at which the desired surface roughness of polysilicon is formed, or merely to passively monitor the process. The power supplied to heat the substrate to a desired temperature can also be monitored, in that a drop in required power is indicative of the formation of polysilicon. By selecting the degree of crystallinity of the layer of doped or undoped amorphous silicon on a substrate, the grain size of the resulting HSG polysilicon can be controlled.
    • 可靠地形成期望表面粗糙度的多晶硅的方法包括在衬底上提供掺杂或未掺杂的非晶硅层并加热所述衬底,同时监测所述衬底的发射并将所监测的发射与可归因于所采用的加热方式的预期发射 。 不能归因于加热方式的监测发射的增加表明非晶硅层向粗多晶硅的转变。 不受加热制度影响的监测排放的减少表明向多晶硅平滑过渡。 监测发射的增加和减少可以用于在形成期望的多晶硅表面粗糙度的时候终止加热状态,或者仅仅被动地监视该过程。 为了将衬底加热到​​所需温度,提供的功率也可以被监测,因为所需功率的下降指示多晶硅的形成。 通过选择衬底上掺杂或未掺杂的非晶硅层的结晶度,可以控制得到的HSG多晶硅的晶粒尺寸。