Invention Grant
- Patent Title: Method of forming a semiconductor structure including a ferroelectric material and semiconductor structure including a ferroelectric transistor
- Patent Title (中): 形成包括铁电材料的半导体结构和包括铁电晶体管的半导体结构的方法
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Application No.: US14471812Application Date: 2014-08-28
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Publication No.: US09412600B2Publication Date: 2016-08-09
- Inventor: Ralf van Bentum , Gunter Grasshoff
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee Address: KY Grand Cayman
- Agency: Amerson Law Firm, PLLC
- Main IPC: H01L21/28
- IPC: H01L21/28 ; H01L27/22 ; H01L29/51 ; H01L21/8234

Abstract:
An illustrative method disclosed herein includes providing a semiconductor structure. The semiconductor structure includes a logic transistor region, a ferroelectric transistor region and an input/output transistor region. A first protection layer is formed over the semiconductor structure. The first protection layer covers the logic transistor region and the input/output transistor region. At least a portion of the ferroelectric transistor region is not covered by the first protection layer. After the formation of the first protection layer, a ferroelectric transistor dielectric is deposited over the semiconductor structure, the ferroelectric transistor dielectric and the first protection layer are removed from the logic transistor region and the input/output transistor region, an input/output transistor dielectric is formed over the input/output transistor region and a logic transistor dielectric is formed over at least the logic transistor region.
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