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    • 6. 发明申请
    • METHOD TO THIN A SILICON-ON-INSULATOR SUBSTRATE
    • 稀土绝缘子基板的方法
    • WO2010122023A2
    • 2010-10-28
    • PCT/EP2010/055198
    • 2010-04-20
    • S.O.I.TEC SILICON ON INSULATOR TECHNOLOGIESREYNAUD, PatrickECARNOT, LudovicRADOUANE, Khalid
    • REYNAUD, PatrickECARNOT, LudovicRADOUANE, Khalid
    • H01L21/306H01L21/762H01L21/18
    • H01L21/30604H01L21/76254
    • The invention concerns a method to thin an initial silicon-on-insulator SOI substrate, comprising a layer (3) of silicon oxide SiO 2 buried between a silicon carrier substrate (2) and a silicon surface layer. This method is noteworthy in that it comprises the following successive steps consisting of conducting: -thermal oxidation treatment of said initial substrate, to oxidize part of said silicon surface layer, -a first, then a second cycle of etching and cleaning, the first cycle etching being performed so as fully to remove the formed thermal oxide and to lift off all the unstable parts of the edge of said initial substrate, the second cycle etch being conducted to remove from the surface of said thinned substrate the formed polluting particles (5) deposited thereupon, so as to obtain a final SOI substrate(1') whose thinned surface layer (4') forms an active layer.
    • 本发明涉及一种薄化初始绝缘体上硅SOI衬底的方法,其包括:在硅载体衬底(2)和硅表面层之间掩埋的氧化硅SiO 2层(3)。 该方法值得注意的是,它包括以下连续步骤,其包括进行: - 对所述初始衬底进行热氧化处理,以氧化所述硅表面层的一部分,首先,然后进行第二循环的蚀刻和清洁,第一循环 执行蚀刻以完全去除所形成的热氧化物并剥离所述初始衬底的边缘的所有不稳定部分,进行第二循环蚀刻以从所述减薄衬底的表面去除形成的污染颗粒(5) 沉积在其上,以便获得其变薄的表面层(4')形成活性层的最终SOI衬底(1')。