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    • 2. 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。
    • 9. 发明授权
    • Capacitor structures with oxynitride layer between capacitor plate and capacitor dielectric layer
    • 在电容器板和电容器介质层之间具有氧氮化物层的电容器结构
    • US07489000B2
    • 2009-02-10
    • US11358647
    • 2006-02-21
    • Ronald A. Weimer
    • Ronald A. Weimer
    • H01L29/94
    • H01L21/02332H01L21/0214H01L21/0217H01L21/02183H01L21/02337H01L21/3144H01L21/31604H01L27/0805H01L28/56H01L28/84
    • Methods for fuming dielectric layers over polysilicon substrates, useful in the construction of capacitors and other semiconductor circuit components are provided. A self-limiting nitric oxide (NO) anneal of a polysilicon layer such as an HSG polysilicon capacitor electrode, at less than 800° C., is utilized to grow a thin oxide (oxynitride) layer of about 40 angstroms or less over the polysilicon layer. The NO anneal provides a nitrogen layer at the polysilicon-oxide interface that limits further oxidation of the polysilicon layer and growth of the oxide layer. The oxide layer is exposed to a nitrogen-containing gas to nitridize the surface of the oxide layer and reduce the effective dielectric constant of the oxide layer. The process is particularly useful in forming high K dielectric insulating layers such as tantalum pentoxide over polysilicon. The nitridized oxynitride layer inhibits oxidation of the underlying polysilicon layer in a post-treatment oxidizing anneal of the high K dielectric, thus maintaining the oxide layer as a thin layer over the polysilicon layer.
    • 提供了在多晶硅衬底上形成电介质层的方法,其用于构建电容器和其它半导体电路部件。 利用多晶硅层(例如HSG多晶硅电容器电极)在小于800℃下的自限制性一氧化氮(NO)退火,以在多晶硅上生长约40埃或更少的薄氧化物(氧氮化物)层 层。 NO退火在多晶硅 - 氧化物界面处提供氮层,限制多晶硅层的进一步氧化和氧化物层的生长。 将氧化物层暴露于含氮气体中以氮化氧化物层的表面并降低氧化物层的有效介电常数。 该方法特别适用于在多晶硅上形成高K电介质绝缘层,例如五氧化二钽。 氮化氮氧化物层在高K电介质的后处理氧化退火中抑制下面的多晶硅层的氧化,从而将氧化物层保持在多晶硅层上的薄层。