Invention Grant
- Patent Title: Metal control gate formation in non-volatile storage
- Patent Title (中): 金属控制栅极形成在非易失性存储
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Application No.: US12845329Application Date: 2010-07-28
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Publication No.: US08278203B2Publication Date: 2012-10-02
- Inventor: Jarrett Jun Liang , Vinod Robert Purayath , Takashi Whitney Orimoto
- Applicant: Jarrett Jun Liang , Vinod Robert Purayath , Takashi Whitney Orimoto
- Applicant Address: US TX Plano
- Assignee: SanDisk Technologies Inc.
- Current Assignee: SanDisk Technologies Inc.
- Current Assignee Address: US TX Plano
- Agency: Vierra Magen Marcus & DeNiro LLP
- Main IPC: H01L21/44
- IPC: H01L21/44

Abstract:
Methods for fabricating control gates in non-volatile storage are disclosed. When forming stacks for floating gate memory cells and transistor control gates, a sacrificial material may be formed at the top of the stacks. After insulation is formed between the stacks, the sacrificial material may be removed to reveal openings. In some embodiments, cutouts are then formed in regions in which control gates of transistors are to be formed. Metal is then formed in the openings, which may include the cutout regions. Therefore, floating gate memory cells having at least partially metal control gates and transistors having at least partially metal control gates may be formed in the same process. A barrier layer may be formed prior to depositing the metal in order to prevent silicidation of polysilicon in the control gates.
Public/Granted literature
- US20120025289A1 METAL CONTROL GATE FORMATION IN NON-VOLATILE STORAGE Public/Granted day:2012-02-02
Information query
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