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    • 6. 发明授权
    • Ultimate SIMOX
    • 终极SIMOX
    • US06717217B2
    • 2004-04-06
    • US10341819
    • 2003-01-14
    • Keith E. FogelMaurice H. NorcottDevendra K. Sadana
    • Keith E. FogelMaurice H. NorcottDevendra K. Sadana
    • H01L2176
    • H01L21/76243
    • A method of forming a silicon-on-insulator (SOI) substrate having a buried oxide region that has a greater content of thermally grown oxide as compared to oxide formed by implanted oxygen ions is provided. Specifically, the inventive SOI substrate is formed by utilizing a method wherein oxygen ions are implanted into a surface of a Si-containing substrate that includes a sufficient Si thickness to allow for subsequent formation of a buried oxide region in the Si-containing substrate which has a greater content of thermally grown oxide as compared to oxide formed by the implanted oxygen ions followed by an annealing step. The sufficient Si thickness can be obtained by (i) forming a Si layer on the surface of the implanted substrate prior to annealing; (ii) conducting a high-energy, high-dose oxygen implant to ensure that the oxygen ions are implanted a sufficient distance from the surface of the Si-containing substrate; or (iii) conducting a high-energy, low-dose oxygen implant so that less implanted oxide is present in the Si-containing substrate.
    • 提供了一种形成具有与由植入的氧离子形成的氧化物相比具有更大含量的热生长氧化物的掩埋氧化物区域的绝缘体上硅(SOI)衬底的方法。 具体地说,本发明的SOI衬底是通过利用其中将氧离子注入包含足够的Si厚度的含Si衬底的表面中以允许随后在含Si衬底中形成掩埋氧化物区域的方法形成的, 与由注入的氧离子形成的氧化物相比,随后进行退火步骤,热生长氧化物的含量更高。 可以通过(i)在退火之前在注入的衬底的表面上形成Si层来获得足够的Si厚度; (ii)进行高能量高剂量氧注入,以确保从含Si衬底表面注入足够距离的氧离子; 或(iii)进行高能量,低剂量的氧注入,使得在含Si衬底中存在少量注入的氧化物。