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    • 5. 发明申请
    • METHOD FOR DEPOSITING POROUS FILMS
    • 沉积多孔膜的方法
    • WO2006023579A1
    • 2006-03-02
    • PCT/US2005/029281
    • 2005-08-16
    • MAK, Cecilia, Y.LAW, Kam, S.
    • MAK, Cecilia, Y.LAW, Kam, S.
    • H01L21/32H01L21/469
    • H01L21/7682H01L21/02126H01L21/02203H01L21/02211H01L21/02274H01L21/0228H01L21/02337H01L21/3124H01L21/31625H01L21/31629H01L21/31695H01L2221/1047
    • A processing method for depositing porous silica and doped silica films is provided. The method uses a cyclic scheme wherein each cycle comprises first codepositing silica with silicon, then selectively removing the silicon to form a porous structure. In a preferred embodiment, the codeposition is carried out by plasma enhanced chemical vapor deposition. The reagent feed stream comprises a mixture of codeposition reagents and a selective silicon removal reagent. RF power modulation is used to control the codeposition and the selective silicon removal steps with the later proceeds whenever the RF power is turned off or reduced to a low level. A porous film with highly uniform small pores and a desired porosity profile can be obtained with this method. This method is advantageous for forming a broad range of low-k dielectrics for semiconductor integrated circuit fabrication. The method is also advantageous for forming other porous films for other applications.
    • 提供了一种用于沉积多孔二氧化硅和掺杂二氧化硅膜的方法。 该方法使用循环方案,其中每个循环包括首先将二氧化硅与硅共沉积,然后选择性地除去硅以形成多孔结构。 在优选的实施方案中,共沉积通过等离子体增强化学气相沉积进行。 试剂进料流包括共沉积试剂和选择性硅去除试剂的混合物。 RF功率调制用于控制共沉积和选择性硅去除步骤,随后RF功率关闭或降低到低电平。 使用该方法可以获得具有高度均匀的小孔和所需孔隙率分布的多孔膜。 该方法有利于形成用于半导体集成电路制造的宽范围的低k电介质。 该方法对于形成用于其它应用的其它多孔膜也是有利的。