Trench FET with Source Recess Etch
    1.
    发明申请
    Trench FET with Source Recess Etch 有权
    沟槽FET,源栅槽蚀刻

    公开(公告)号:US20130344667A1

    公开(公告)日:2013-12-26

    申请号:US13528375

    申请日:2012-06-20

    IPC分类号: H01L21/336

    摘要: A high voltage vertical field effect transistor device (101) is fabricated in a substrate (102, 104) using angled implantations (116, 120) into trench sidewalls formed above recessed gate poly layers (114) to form self-aligned N+ regions (123) adjacent to the trenches and along an upper region of an elevated substrate. With a trench fill insulator layer (124) formed over the recessed gate poly layers (114), self-aligned P+ body contact regions (128) are implanted into the elevated substrate without counter-doping the self-aligned N+ regions (123), and a subsequent recess etch removes the elevated substrate, leaving self-aligned N+ source regions (135-142) and P+ body contact regions (130-134).

    摘要翻译: 使用成角度的注入(116,120)形成在形成自对准N +区域(123)的沟槽侧壁中的衬底(102,104)中来制造高电压垂直场效应晶体管器件(101) )并且沿着升高的基底的上部区域。 利用形成在凹陷多晶硅层(114)上方的沟槽填充绝缘体层(124),将自对准P +体接触区域(128)注入升高的衬底中,而不会反向掺杂自对准的N +区域(123) 并且随后的凹陷蚀刻去除升高的衬底,留下自对准的N +源区(135-142)和P +体接触区(130-134)。

    Trench FET with source recess etch
    2.
    发明授权
    Trench FET with source recess etch 有权
    沟槽FET,源凹槽蚀刻

    公开(公告)号:US08895394B2

    公开(公告)日:2014-11-25

    申请号:US13528375

    申请日:2012-06-20

    摘要: A high voltage vertical field effect transistor device (101) is fabricated in a substrate (102, 104) using angled implantations (116, 120) into trench sidewalls formed above recessed gate poly layers (114) to form self-aligned N+ regions (123) adjacent to the trenches and along an upper region of an elevated substrate. With a trench fill insulator layer (124) formed over the recessed gate poly layers (114), self-aligned P+ body contact regions (128) are implanted into the elevated substrate without counter-doping the self-aligned N+ regions (123), and a subsequent recess etch removes the elevated substrate, leaving self-aligned N+ source regions (135-142) and P+ body contact regions (130-134).

    摘要翻译: 使用成角度的注入(116,120)形成在形成自对准N +区域(123)的沟槽侧壁中的衬底(102,104)中来制造高电压垂直场效应晶体管器件(101) )并且沿着升高的基底的上部区域。 利用形成在凹陷多晶硅层(114)上方的沟槽填充绝缘体层(124),将自对准P +体接触区域(128)注入升高的衬底中,而不会反向掺杂自对准的N +区域(123) 并且随后的凹陷蚀刻去除升高的衬底,留下自对准的N +源区(135-142)和P +体接触区(130-134)。