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    • 13. 发明授权
    • Method of forming gate electrode in semiconductor device
    • 在半导体器件中形成栅电极的方法
    • US07179707B2
    • 2007-02-20
    • US10722814
    • 2003-11-26
    • Cha Deok DongHo Min Son
    • Cha Deok DongHo Min Son
    • H01L21/336H01L21/461H01L21/302
    • H01L21/28247H01L21/28061H01L21/321H01L21/32137
    • A method for forming a gate electrode in the semiconductor device is disclosed. The disclosed methods for forming a gate electrode in a semiconductor includes forming a polysilicon film and a metal silicide film sequentially on an upper portion of a semiconductor substrate; performing an annealing process to crystallize the metal silicide film, so that etch rate of the crystallized metal silicide film is similar to that of the polysilicon film; and forming a gate electrode by performing an etching process at one time on the metal silicide film and the polysilicon film using the similar etch rates of the crystallized metal silicide film and the polysilicon film. According to the disclosed methods, the tungsten silicide film is crystallized by an annealing process and the polysilicon film and the crystallized tungsten suicide film are etched at one time to prevent any formation of recesses of the polysilicon film, so that it is possible to form the gate electrode pattern having the vertical profile.
    • 公开了一种在半导体器件中形成栅电极的方法。 所公开的在半导体中形成栅电极的方法包括在半导体衬底的上部依次形成多晶硅膜和金属硅化物膜; 执行退火处理以使金属硅化物膜结晶,使得结晶的金属硅化物膜的蚀刻速率与多晶硅膜的蚀刻速率相似; 以及通过使用结晶化金属硅化物膜和多晶硅膜的相似蚀刻速率在金属硅化物膜和多晶硅膜上一次进行蚀刻工艺来形成栅电极。 根据所公开的方法,通过退火处理使硅化钨膜结晶,同时蚀刻多晶硅膜和结晶化硅化钨膜,以防止多晶硅膜的凹陷的形成,从而可以形成 栅电极图案具有垂直轮廓。
    • 14. 发明授权
    • Method of manufacturing flash memory device
    • 制造闪存设备的方法
    • US07037785B2
    • 2006-05-02
    • US10618978
    • 2003-07-14
    • Cha Deok DongHo Min Son
    • Cha Deok DongHo Min Son
    • H01L21/336
    • H01L27/11521H01L21/76232H01L27/115
    • Disclosed is a method of manufacturing the flash memory device. The method comprises the steps of sequentially forming a tunnel oxide film, a first polysilicon film and a hard mask film on a semiconductor substrate, etching portions of the hard mask film, the first polysilicon film, the tunnel oxide film and the semiconductor substrate through a patterning process to form a trench within the semiconductor substrate, depositing an oxide film to bury the trench and then polishing the oxide film by means of a chemical mechanical polishing process until the hard mask film is exposed, removing the hard mask film, implementing a cleaning process so that a protrusion of the oxide film is recessed to an extent that the sidewall bottom of the first polysilicon film is not exposed, depositing a second polysilicon film on the results in which the protrusion of the oxide film is recessed and then polishing the second polysilicon film until the protrusion of the oxide film is exposed, forming a dielectric film on the second polysilicon film, and forming a control gate on the dielectric film.
    • 公开了一种制造闪速存储器件的方法。 该方法包括以下步骤:在半导体衬底上依次形成隧道氧化物膜,第一多晶硅膜和硬掩模膜,通过以下步骤蚀刻硬掩模膜,第一多晶硅膜,隧道氧化物膜和半导体衬底的部分 图案化工艺以在半导体衬底内形成沟槽,沉积氧化膜以埋入沟槽,然后通过化学机械抛光工艺抛光氧化膜,直到硬掩模膜暴露,去除硬掩模膜,实施清洁 处理,使得氧化膜的突出部凹陷到第一多晶硅膜的侧壁底部没有露出的程度,在氧化膜的突起凹陷的结果上沉积第二多晶硅膜,然后抛光第二多晶硅膜 多晶硅膜直到氧化膜的突起露出,在第二多晶硅膜上形成电介质膜,并形成对照 介质膜上的栅极。