Methods of manufacturing semiconductor devices having low resistance buried gate structures
    1.
    发明授权
    Methods of manufacturing semiconductor devices having low resistance buried gate structures 有权
    制造具有低电阻掩埋栅极结构的半导体器件的方法

    公开(公告)号:US08168521B2

    公开(公告)日:2012-05-01

    申请号:US12725743

    申请日:2010-03-17

    IPC分类号: H01L21/3205 H01L21/4763

    摘要: In a method of manufacturing a semiconductor device, a recess is formed in an active region of a substrate. A gate insulation layer is formed in the first recess. A barrier layer is formed on the gate insulation layer. A preliminary nucleation layer having a first resistance is formed on the barrier layer. The preliminary nucleation layer is converted into a nucleation layer having a second resistance substantially smaller than the first resistance. A conductive layer is formed on the nucleation layer. The conductive layer, the nucleation layer, the barrier layer and the gate insulation layer are partially etched to form a buried gate structure including a gate insulation layer pattern, a barrier layer pattern, a nucleation layer pattern and a conductive layer pattern.

    摘要翻译: 在制造半导体器件的方法中,在衬底的有源区中形成凹部。 在第一凹部中形成栅极绝缘层。 在栅绝缘层上形成阻挡层。 在阻挡层上形成具有第一电阻的预成核层。 将初始成核层转变成具有比第一电阻显着小的第二电阻的成核层。 在成核层上形成导电层。 部分蚀刻导电层,成核层,势垒层和栅极绝缘层,以形成包括栅极绝缘层图案,势垒层图案,成核层图案和导电层图案的掩埋栅极结构。