Invention Grant
- Patent Title: Three-dimensional memory device containing dummy antenna diodes
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Application No.: US15991268Application Date: 2018-05-29
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Publication No.: US10580787B2Publication Date: 2020-03-03
- Inventor: Masatoshi Nishikawa , Fumiaki Toyama
- Applicant: SANDISK TECHNOLOGIES LLC
- Applicant Address: US TX Addison
- Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee Address: US TX Addison
- Agency: The Marbury Law Group, PLLC
- Main IPC: H01L27/1157
- IPC: H01L27/1157 ; H01L27/11582 ; H01L27/11556 ; H01L27/11524 ; H01L27/11529 ; H01L27/11573 ; H01L27/06 ; H01L21/762

Abstract:
At least one diode, lower-level metal interconnect structures embedded within lower-level dielectric material layers, and a doped semiconductor material layer are formed over a semiconductor substrate. An electrically conductive path is provided between the at least one diode and the doped semiconductor material layer. An alternating stack of insulating layers and spacer material layers and memory stack structures extending therethrough are formed above the doped semiconductor material layer. A backside trench is formed through the alternating stack. The electrically conductive path is employed during plasma etch processes employed to form the memory stack structures and the backside trench to provide a discharge path for accumulated electrical charges. The electrically conductive path is subsequently disconnected by removing a conductive component underlying the backside trench. The spacer material layers can be replaced with electrically conductive layers employing the backside trench.
Public/Granted literature
- US20190371800A1 THREE-DIMENSIONAL MEMORY DEVICE CONTAINING ANTENNA DIODES AND METHOD OF MAKING THEREOF Public/Granted day:2019-12-05
Information query
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