Using thin undoped TEOS with BPTEOS ILD or BPTEOS ILD alone to improve charge loss and contact resistance in multi-bit memory devices
    11.
    发明申请
    Using thin undoped TEOS with BPTEOS ILD or BPTEOS ILD alone to improve charge loss and contact resistance in multi-bit memory devices 审中-公开
    使用薄的未掺杂TEOS与BPTEOS ILD或BPTEOS ILD单独改善多位存储器件中的电荷损失和接触电阻

    公开(公告)号:US20070029604A1

    公开(公告)日:2007-02-08

    申请号:US11546688

    申请日:2006-10-12

    IPC分类号: H01L29/788

    CPC分类号: H01L27/115 H01L27/11568

    摘要: The present invention facilitates dual bit memory devices and operation of dual bit memory device by providing systems and methods that employ a relatively thin undoped TEOS liner during fabrication, instead of a relatively thick TEOS layer that is conventionally used. Employment of the relatively thin liner facilitates dual bit memory device operation by mitigating charge loss and contact resistance while providing protection against unwanted dopant diffusion. The present invention includes utilizing a relatively thin undoped TEOS liner that is formed on wordlines and portions of a charge trapping dielectric layer. The relatively thin undoped TEOS liner is formed with a thickness of less than about 400 Angstroms so that contact resistance and charge loss are improved and yet providing suitable protection for operation of the device. Additionally, the present invention includes foregoing with an undoped TEOS liner altogether.

    摘要翻译: 本发明通过提供在制造期间使用相对薄的未掺杂TEOS衬垫的系统和方法而不是通常使用的相对较厚的TEOS层来便于双位存储器件和双位存储器件的操作。 使用相对薄的衬垫通过减轻电荷损失和接触电阻而提供双位存储器件操作,同时提供防止不期望的掺杂剂扩散的保护。 本发明包括利用形成在字线和电荷捕获电介质层的部分上的相对薄的未掺杂的TEOS衬垫。 相对薄的未掺杂的TEOS衬垫形成有小于约400埃的厚度,使得接触电阻和电荷损失得到改善,并且为器件的操作提供适当的保护。 此外,本发明包括前述的未掺杂的TEOS衬垫。