公开(公告)号：US07671394B2

公开(公告)日：2010-03-02

申请号：US11873728

申请日：2007-10-17

申请人： Roger A. Booth, Jr. ,  MaryJane Brodsky ,  Kangguo Cheng ,  Chengwen Pei

发明人： Roger A. Booth, Jr. ,  MaryJane Brodsky ,  Kangguo Cheng ,  Chengwen Pei

IPC分类号： H01L27/106 ,  H01L21/8242

CPC分类号： H01L27/1087

摘要： A deep trench is formed in a semiconductor substrate and a pad layer thereupon, and filled with a dummy node dielectric and a dummy trench fill. A shallow trench isolation structure is formed in the semiconductor substrate. A dummy gate structure is formed in a device region after removal of the pad layer. A first dielectric layer is formed over the dummy gate structure and a protruding portion of the dummy trench fill and then planarized. The dummy structures are removed. The deep trench and a cavity formed by removal of the dummy gate structure are filled with a high dielectric constant material layer and a metallic layer, which form a high-k node dielectric and a metallic inner electrode of a deep trench capacitor in the deep trench and a high-k gate dielectric and a metal gate in the device region.

摘要翻译： 在半导体衬底和衬垫层中形成深沟槽，并填充有虚拟节点电介质和虚设沟槽填充物。 在半导体衬底中形成浅沟槽隔离结构。 去除焊盘层之后，在器件区域中形成虚拟栅极结构。 在虚拟栅极结构上形成第一电介质层，并且填充虚拟沟槽的突出部分，然后进行平坦化。 虚拟结构被去除。 深沟槽和通过去除伪栅极结构形成的空腔填充有高介电常数材料层和金属层，其形成深沟槽中的高k节点电介质和深沟槽电容器的金属内电极 以及在器件区域中的高k栅极电介质和金属栅极。