Invention Grant
- Patent Title: Multi-level contact to a 3D memory array and method of making
- Patent Title (中): 与3D内存阵列的多层次接触和制作方法
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Application No.: US13478483Application Date: 2012-05-23
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Publication No.: US08828884B2Publication Date: 2014-09-09
- Inventor: Yao-Sheng Lee , Zhen Chen , Syo Fukata
- Applicant: Yao-Sheng Lee , Zhen Chen , Syo Fukata
- Applicant Address: US TX Plano
- Assignee: Sandisk Technologies Inc.
- Current Assignee: Sandisk Technologies Inc.
- Current Assignee Address: US TX Plano
- Agency: The Marbury Law Group PLLC
- Main IPC: H01L21/467
- IPC: H01L21/467

Abstract:
A method of making multi-level contacts. The method includes providing an in-process multilevel device including at least one device region and at least one contact region. The contact region includes a plurality of electrically conductive layers configured in a step pattern. The method also includes forming a conformal etch stop layer over the plurality of electrically conductive layers, forming a first electrically insulating layer over the etch stop layer, forming a conformal sacrificial layer over the first electrically insulating layer and forming a second electrically insulating layer over the sacrificial layer. The method also includes etching a plurality of contact openings through the etch stop layer, the first electrically insulating layer, the sacrificial layer and the second electrically insulating layer in the contact region to the plurality of electrically conductive layers.
Public/Granted literature
- US20130313627A1 Multi-Level Contact to a 3D Memory Array and Method of Making Public/Granted day:2013-11-28
Information query
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