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    • 17. 发明授权
    • Protective oxide buffer layer for ARC removal
    • 用于ARC去除的保护性氧化物缓冲层
    • US06291329B1
    • 2001-09-18
    • US09371921
    • 1999-08-11
    • Richard J. HuangLewis Shen
    • Richard J. HuangLewis Shen
    • H01L213205
    • H01L21/32139H01L21/3145H01L21/3185
    • An oxide buffer layer is formed between an underlying silicon layer and overlying ARC to prevent damage to the silicon layer when removing the ARC. Embodiments include depositing a silicon oxide buffer layer on an amorphous or polycrystalline silicon layer by PCVD, LPCVD or high temperature CVD, forming a SiON or Si-rich SiN ARC on the silicon oxide buffer layer, forming a photoresist mask on the ARC, patterning the underlying silicon layer to form a conductive line or gate electrode, stripping the photoresist mask and then stripping the ARC with hot phosphoric acid while the silicon oxide buffer layer protects the underlying silicon feature from pitting.
    • 在下面的硅层和上覆的ARC之间形成氧化物缓冲层,以防止在去除ARC时损坏硅层。 实施例包括通过PCVD,LPCVD或高温CVD在非晶或多晶硅层上沉积硅氧化物缓冲层,在氧化硅缓冲层上形成SiON或富Si SiN SiN ARC,在ARC上形成光刻胶掩模, 底层硅层以形成导电线或栅电极,剥离光致抗蚀剂掩模,然后用热磷酸剥离ARC,而氧化硅缓冲层保护下面的硅特征免于点蚀。