发明名称 |
Semiconductor device and method for manufacturing the same |
摘要 |
A method for manufacturing a fin structure. The method includes: forming a first semiconductor layer and a second semiconductor layer sequentially on a substrate; patterning the second and first semiconductor layers to form an initial fin; selectively etching the first semiconductor layer of the initial fin so that the first semiconductor layer has a lateral recess; forming an isolation layer having a portion that fills the lateral recess, wherein the isolation layer, except the portion that fills the lateral recess, has a top surface lower than a top surface of the first semiconductor layer but higher than a bottom surface of the first semiconductor layer, and thus defines a fin above the isolation layer; and forming a gate stack intersecting the fin on the isolation layer. |
申请公布号 |
US9601566(B2) |
申请公布日期 |
2017.03.21 |
申请号 |
US201214439514 |
申请日期 |
2012.11.19 |
申请人 |
INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES |
发明人 |
Zhu Huilong |
分类号 |
H01L29/06;H01L29/78;H01L29/66;H01L29/40;H01L21/28;H01L21/306;H01L21/8238;H01L27/092 |
主分类号 |
H01L29/06 |
代理机构 |
Christensen, Fonder, Dardi & Herbert PLLC |
代理人 |
Christensen, Fonder, Dardi & Herbert PLLC |
主权项 |
1. A semiconductor device, comprising:
a substrate; first and second semiconductor layers stacked in a vertical direction on a substrate, wherein the first semiconductor layer has a lateral recess relative to the second semiconductor layer; an isolation layer formed on the substrate, having a portion that fills the lateral recess, wherein the isolation layer, except the portion that fills the lateral recess, has a top surface lower than a top surface of the first semiconductor layer but higher than a bottom surface of the first semiconductor layer, and thus defines a fin above the isolation layer; and a gate stack formed on the isolation layer and intersecting the fin, wherein the gate stack comprises a gate dielectric layer and a gate conductor layer, wherein said portion of the isolation layer has a first surface extending in the vertical direction and facing and contiguous to the first semiconductor layer, and also a second surface, opposite to the first surface, extending in the vertical direction and facing and contiguous to the gate dielectric layer. |
地址 |
Beijing CN |