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    • 4. 发明授权
    • Method of forming oxynitride gate dielectric
    • 形成氮氧化物栅极电介质的方法
    • US06245616B1
    • 2001-06-12
    • US09226369
    • 1999-01-06
    • Douglas Andrew BuchananMatthew Warren CopelPatrick Ronald Varekamp
    • Douglas Andrew BuchananMatthew Warren CopelPatrick Ronald Varekamp
    • H01L21336
    • H01L21/28185H01L21/28194H01L21/28202H01L29/513H01L29/518
    • A method for forming an oxynitride gate dielectric in a semiconductor device and gate dielectric structure formed by the method are disclosed. In the method, an oxynitride layer is first formed on a silicon surface and then re-oxidized with a gas mixture containing oxygen and at least one halogenated species such that an oxynitride layer with a controlled nitrogen profile and a layer of substantially silicon dioxide formed underneath the oxynitride film is obtained. The oxynitride film layer can be formed by either contacting a surface of silicon with at least one gas that contains nitrogen and/or oxygen at a temperature of not less than 500° C. or by a chemical vapor deposition technique. The re-oxidation process may be carried out by a thermal process in an oxidizing halogenated atmosphere containing oxygen and a halogenated species such as HCl, CH2Cl2, C2H3Cl3, C2H2Cl2, CH3Cl and CHCl3.
    • 公开了一种在半导体器件中形成氧氮化物栅极电介质的方法和通过该方法形成的栅极电介质结构。 在该方法中,首先在硅表面上形成氧氮化物层,然后用含有氧和至少一种卤化物质的气体混合物再次氧化,使得具有受控氮分布的氧氮化物层和形成在下面的基本上二氧化硅层 得到氧氮化物膜。 氧氮化物膜层可以通过在不低于500℃的温度下或通过化学气相沉积技术使硅表面与至少一种含有氮和/或氧的气体接触而形成。 再氧化过程可以通过在含氧和卤化物质如HCl,CH 2 Cl 2,C 2 H 3 Cl 3,C 2 H 2 Cl 2,CH 3 Cl和CHCl 3的氧化卤化气氛中的热处理进行。