Invention Grant
- Patent Title: Locally raised epitaxy for improved contact by local silicon capping during trench silicide processings
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Application No.: US14620233Application Date: 2015-02-12
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Publication No.: US09305883B2Publication Date: 2016-04-05
- Inventor: Sebastian Naczas , Vamsi Paruchuri , Alexander Reznicek , Dominic J. Schepis
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Scully Scott Murphy and Presser
- Main IPC: H01L29/66
- IPC: H01L29/66 ; H01L23/535 ; H01L29/78 ; H01L29/45 ; H01L29/417 ; H01L29/06

Abstract:
A low resistance contact to a finFET source/drain can be achieved by forming a defect free surface on which to form such contact. The fins of a finFET can be exposed to epitaxial growth conditions to increase the bulk of semiconductive material in the source/drain. Facing growth fronts can merge or can form unmerged facets. A dielectric material can fill voids within the source drain region. A trench spaced from the finFET gate can expose the top portion of faceted epitaxial growth on fins within said trench, such top portions separated by a smooth dielectric surface. A silicon layer selectively formed on the top portions exposed within the trench can be converted to a semiconductor-metal layer, connecting such contact with individual fins in the source drain region.
Public/Granted literature
- US20150179576A1 LOCALLY RAISED EPITAXY FOR IMPROVED CONTACT BY LOCAL SILICON CAPPING DURING TRENCH SILICIDE PROCESSINGS Public/Granted day:2015-06-25
Information query
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