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    • 79. 发明授权
    • RLSA CVD deposition control using halogen gas for hydrogen scavenging
    • 使用卤素气体进行氢气清除的RLSA CVD沉积控制
    • US07763551B2
    • 2010-07-27
    • US12059100
    • 2008-03-31
    • Jozef BrckaSong Yun KangToshio NakanishiPeter L. G. VentzekMinoru HondaMasayuki Kohno
    • Jozef BrckaSong Yun KangToshio NakanishiPeter L. G. VentzekMinoru HondaMasayuki Kohno
    • H01L21/31
    • C23C16/345C23C16/511H01J37/32192H01J37/3222Y10T29/41
    • Film thickness uniformity and stoichiometry are controlled and deposition rate is increased in the chemical vapor deposition (CVD) of silicon nitride from complex gas mixtures in microwave plasmas. In Si2H6+NH3+Ar gas mixtures using a radial line slot antenna (RLSA) microwave plasma to deposit SiN by CVD, deposition rate and film uniformity are improved by limiting the amounts of atomic or molecular hydrogen from the gas mixture during the deposition process. A halogen, for example, fluorine, is added to a gas mixture of silane or disilane, ammonia and argon. The halogen scavenges hydrogen from the mixture, and prevents the hydrogen from blocking the nitrogen and silicon atoms and their fragments from bonding to the surface atoms and to grow stoichiometric silicon nitride. Adding the halogen generates free halogen radicals that react with hydrogen to create hydrogen halide, for example, HF or HCl, thereby scavenging the hydrogen.
    • 微波等离子体中复合气体混合物中氮化硅的化学气相沉积(CVD)控制了膜厚均匀性和化学计量,沉积速率增加。 在使用径向线槽天线(RLSA)微波等离子体通过CVD沉积SiN的Si 2 H 6 + NH 3 + Ar气体混合物中,通过在沉积过程中限制来自气体混合物的原子或分子氢的量来提高沉积速率和膜均匀性。 将卤素,例如氟加入到硅烷或乙硅烷,氨和氩的气体混合物中。 卤素从混合物中清除氢,并且防止氢阻挡氮和硅原子及其片段与表面原子结合并生长化学计量的氮化硅。 加入卤素产生与氢反应产生卤化氢,例如HF或HCl的游离卤素自由基,从而清除氢。