Invention Grant
- Patent Title: Gate last vertical transport field effect transistor
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Application No.: US16405849Application Date: 2019-05-07
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Publication No.: US11245025B2Publication Date: 2022-02-08
- Inventor: Choonghyun Lee , Soon-Cheon Seo , Injo Ok , 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: Lou Percello, Attorney, PLLC
- Agent Erik Johnson
- Main IPC: H01L29/66
- IPC: H01L29/66 ; H01L29/78 ; H01L29/49 ; H01L29/423 ; H01L21/28 ; H01L27/088 ; H01L21/8234

Abstract:
Vertical transport field effect transistors (VTFET) are disclosed along with methods of making. The VTFET is made with a novel gate last replacement metal gate (RMG) process. The invention allows uniform and high doping levels without adversely affecting the gate region in the process. The distance from the S/D regions and the junctions are the same. Fin caps protect the fins and gate protecting hard mask protect the dummy gate material during the beginning process steps. The invention enables easy connection and increased surface area at the connection points to reduce contact resistance.
Information query
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