发明名称 |
Structure and method of forming enhanced array device isolation for implanted plate EDRAM |
摘要 |
A memory device is provided including a semiconductor on insulator (SOI) substrate including a first semiconductor layer atop a buried dielectric layer, wherein the buried dielectric layer is overlying a second semiconductor layer. A capacitor is present in a trench, wherein the trench extends from an upper surface of the first semiconductor layer through the buried dielectric layer and extends into the second semiconductor layer. A protective oxide is present in a void that lies adjacent the first semiconductor layer, and a pass transistor is present atop the semiconductor on insulator substrate in electrical communication with the capacitor. |
申请公布号 |
US9059320(B2) |
申请公布日期 |
2015.06.16 |
申请号 |
US201213408187 |
申请日期 |
2012.02.29 |
申请人 |
International Business Machines Corporation |
发明人 |
Ho Herbert L.;Kusaba Naoyoshi;Nummy Karen A.;Radens Carl J.;Todi Ravi M.;Wang Geng |
分类号 |
H01L27/108;H01L29/94;H01L21/84;H01L21/762;H01L29/66 |
主分类号 |
H01L27/108 |
代理机构 |
Scully, Scott, Murphy & Presser, P.C. |
代理人 |
Scully, Scott, Murphy & Presser, P.C. ;Ivers, Esq. Catherine |
主权项 |
1. A memory device comprising:
a semiconductor on insulator (SOI) substrate including a first semiconductor layer atop a buried dielectric layer, wherein the buried dielectric layer is entirely located above a topmost surface of a second semiconductor layer; a capacitor present in a trench, wherein the trench extends from an upper surface of the first semiconductor layer through the buried dielectric layer and extends into the second semiconductor layer and the capacitor includes a bottom electrode having a surface in direct physical contact with a bottommost surface of the buried dielectric layer, wherein a protective oxide is present in a void that lies adjacent the first semiconductor layer, said protective oxide having a topmost surface that is coplanar with a topmost surface of said first semiconductor layer, a bottommost surface that is in direct physical contact with a topmost surface of said buried dielectric layer and a sidewall surface that is in directly physical contact with a sidewall surface of said first semiconductor material; and a pass transistor present atop the semiconductor on insulator substrate in electrical communication with the capacitor; wherein said protective oxide is present only on one side of the trench, and wherein a doped polysilicon region is present on another side of the trench; and wherein a top trench oxide is positioned between said protective oxide and said doped polysilicon region. |
地址 |
Armonk NY US |