Invention Grant
US09536971B2 Semiconductor device comprising a transistor gate having multiple vertically oriented sidewalls
有权
半导体器件包括具有多个垂直取向侧壁的晶体管栅极
- Patent Title: Semiconductor device comprising a transistor gate having multiple vertically oriented sidewalls
- Patent Title (中): 半导体器件包括具有多个垂直取向侧壁的晶体管栅极
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Application No.: US14561605Application Date: 2014-12-05
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Publication No.: US09536971B2Publication Date: 2017-01-03
- Inventor: Werner Juengling
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: Wells St. John, P.S.
- Main IPC: H01L29/423
- IPC: H01L29/423 ; H01L21/265 ; H01L29/66 ; H01L29/78

Abstract:
A method used in fabrication of a recessed access device transistor gate has increased tolerance for mask misalignment. One embodiment of the invention comprises forming a vertical spacing layer over a semiconductor wafer, then etching the vertical spacing layer and the semiconductor wafer to form a recess in the wafer. A conductive transistor gate layer is then formed within the trench and over the vertical spacing layer. The transistor gate layer is etched, which exposes the vertical spacing layer. A spacer layer is formed over the etched conductive gate layer and over the vertical spacing layer, then the spacer layer and the vertical spacing layer are anisotropically etched. Subsequent to anisotropically etching the vertical spacing layer, a portion of the vertical spacing layer is interposed between the semiconductor wafer and the etched conductive transistor gate layer in a direction perpendicular to the plane of a major surface of the semiconductor wafer.
Public/Granted literature
- US20150108566A1 Semiconductor Device Comprising a Transistor Gate Having Multiple Vertically Oriented Sidewalls Public/Granted day:2015-04-23
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