- Patent Title: Strained silicon complementary metal oxide semiconductor including a silicon containing tensile n-type fin field effect transistor and silicon containing compressive p-type fin field effect transistor formed using a dual relaxed substrate
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Application No.: US15786037Application Date: 2017-10-17
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Publication No.: US10998441B2Publication Date: 2021-05-04
- Inventor: Kangguo Cheng , Nicolas J. Loubet , Xin Miao , Alexander Reznicek
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Applicant Address: US NY Armonk
- Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee Address: US NY Armonk
- Agency: Tutunjian & Bitetto, P.C.
- Agent Randall Bluestone
- Main IPC: H01L29/78
- IPC: H01L29/78 ; H01L27/092 ; H01L21/8238

Abstract:
A method of forming a semiconductor device that includes forming a strain relaxed buffer (SRB) layer atop a supporting substrate, and epitaxially forming a tensile semiconductor material atop a first portion of the strain relaxed buffer layer (SRB) layer. A second portion of the SRB layer is then removed, and a semiconductor material including a base material of silicon and phosphorus is formed atop a surface of the supporting substrate exposed by removing the second portion of the SRB layer. A compressive semiconductor material is epitaxially forming atop the semiconductor material including the base material of silicon and phosphorus. Compressive FinFET structures can then be formed from the compressive semiconductor material and tensile FinFET structures can then be formed from the tensile semiconductor material.
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