Invention Grant
- Patent Title: Self aligned silicon carbide contact formation using protective layer
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Application No.: US15582940Application Date: 2017-05-01
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Publication No.: US10049879B2Publication Date: 2018-08-14
- Inventor: Ravi Keshav Joshi , Romain Esteve , Markus Kahn , Kurt Pekoll , Juergen Steinbrenner , Gerald Unegg
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Neubiberg
- Agency: Murphy, Bilak & Homiller, PLLC
- Main IPC: H01L29/15
- IPC: H01L29/15 ; H01L21/04 ; H01L29/16 ; H01L21/324 ; H01L29/45 ; H01L21/02

Abstract:
A silicon-carbide substrate that includes: a doped silicon-carbide contact region directly adjoining a main surface of the substrate, and a dielectric layer covering the main surface is provided. A protective layer is formed on the silicon-carbide substrate such that the protective layer covers the dielectric layer and exposes the doped silicon-carbide contact region at the main surface. A metal layer that conforms to the protective layer and directly contacts the exposed doped silicon-carbide contact region is deposited. A first rapid thermal anneal process is performed. A thermal budget of the first rapid thermal anneal process is selected to cause the metal layer to form a silicide with the doped silicon-carbide contact region during the first rapid thermal anneal process without causing the metal layer to form a silicide with the protective layer during the first rapid thermal anneal process.
Public/Granted literature
- US20180076036A1 Self Aligned Silicon Carbide Contact Formation Using Protective Layer Public/Granted day:2018-03-15
Information query
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