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    • 4. 发明授权
    • Method of forming a device isolation trench in an integrated circuit device
    • 在集成电路器件中形成器件隔离沟槽的方法
    • US06828210B2
    • 2004-12-07
    • US10080884
    • 2002-02-22
    • Do-Hyung KimSung-Bong KimJung-In Hong
    • Do-Hyung KimSung-Bong KimJung-In Hong
    • H01L2176
    • H01L21/76232
    • A method of forming a trench isolation in a semiconductor substrate is described, which comprises the steps of forming a trench on the substrate, forming a diffusion barrier insulating layer, forming a thermal oxide layer both sidewall and bottom of the trench contacted with the diffusion barrier insulating layer, forming a nitride liner, and forming trench isolation material to fill the trench. A multi-structure of the barrier layer and the thermal oxide layer is provided between the nitride liner and the trench, resulting in minimization of transistor characteristic deterioration. A thin thermal oxide layer is formed to achieve improved trench etching profile.
    • 描述了在半导体衬底中形成沟槽隔离的方法,其包括以下步骤:在衬底上形成沟槽,形成扩散阻挡绝缘层,形成与扩散阻挡层接触的沟槽的侧壁和底部的热氧化物层 绝缘层,形成氮化物衬垫,以及形成沟槽隔离材料以填充沟槽。 在氮化物衬垫和沟槽之间设置阻挡层和热氧化物层的多结构,导致晶体管特性劣化的最小化。 形成薄的热氧化物层以实现改进的沟槽蚀刻轮廓。