公开(公告)号：US08975142B2

公开(公告)日：2015-03-10

申请号：US13870854

申请日：2013-04-25

Applicant: GLOBALFOUNDRIES, Inc.

Inventor： Abhijeet Paul ,  Abner Bello ,  Vimal K. Kamineni ,  Derya Deniz

IPC: H01L29/786 ,  H01L29/78 ,  H01L21/336 ,  H01L29/66 ,  H01L21/8234 ,  H01L21/8238

CPC classification number: H01L29/66795 ,  H01L21/823431 ,  H01L21/823821 ,  H01L29/66636 ,  H01L29/7848 ,  H01L29/785

Abstract: Performance of a FinFET is enhanced through a structure that exerts physical stress on the channel. The stress is achieved by a combination of tungsten contacts for the source and drain, epitaxially grown raised source and raised drain, and manipulation of aspects of the tungsten contact deposition resulting in enhancement of the inherent stress of tungsten. The stress can further be enhanced by epitaxially re-growing the portion of the raised source and drain removed by etching trenches for the contacts and/or etching deeper trenches (and corresponding longer contacts) below a surface of the fin.

Abstract translation: 通过在通道上施加物理应力的结构来增强FinFET的性能。 应力通过用于源极和漏极的钨触点，外延生长的升高源和升高的漏极的组合以及钨接触沉积的方面的操作来实现，从而导致钨的固有应力的增强。 通过外延重新生长升高的源极和漏极的部分，通过蚀刻用于触点的沟槽和/或蚀刻在鳍的表面下方的较深的沟槽（和相应的更长的触点）来进一步增强应力。