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    • 42. 发明授权
    • SOI semiconductor device and method of producing same wherein warpage is
reduced in the semiconductor device
    • SOI半导体器件及其制造方法,其中在半导体器件中翘曲减小
    • US5599722A
    • 1997-02-04
    • US346255
    • 1994-11-23
    • Takayuki SugisakaShoji MiuraToshio Sakakibara
    • Takayuki SugisakaShoji MiuraToshio Sakakibara
    • H01L21/02H01L21/76H01L21/762H01L27/12H01L21/265H01L21/302
    • H01L21/76264H01L21/76275H01L21/76281H01L21/76286
    • A trench isolation junction type SOI semiconductor device which reduces substrate warpage while suppressing increase in production steps and a method for producing the same are disclosed. A junction substrate is formed by bonding a semiconductor substrate having an outer insulation film on a non-junction main surface with a semiconductor layer with an inner insulation film sandwiched therebetween. After forming a silicon nitride film as a mask for the purpose of forming a trench in the semiconductor layer, silicon nitride film accumulated on the outer insulation film is removed. By doing this, warpage of the semiconductor substrate due to discrepancies in the thermal expansion rates of the rigid silicon nitride film and semiconductor substrate can be prevented. In a junction type SOI semiconductor device formed via the method, an outer insulation film of identical thickness and identical density to an inner insulation film is formed on a non-junction main surface (i.e., rear surface) of a semiconductor substrate. By doing this, warpage of the semiconductor substrate can be prevented.
    • 公开了一种在抑制生产步骤增加的同时降低衬底翘曲的沟槽隔离结型SOI半导体器件及其制造方法。 通过在非接合主表面上具有外绝缘膜的半导体衬底与夹在其间的内绝缘膜的半导体层结合来形成接合衬底。 在形成用于在半导体层中形成沟槽的掩模的氮化硅膜之后,除去积聚在外绝缘膜上的氮化硅膜。 通过这样做,可以防止由于刚性氮化硅膜和半导体衬底的热膨胀率的差异导致的半导体衬底的翘曲。 在通过该方法形成的结型SOI半导体器件中,在半导体衬底的非接合主表面(即后表面)上形成具有相同厚度和与内绝缘膜相同密度的外绝缘膜。 通过这样做,可以防止半导体衬底的翘曲。