Invention Grant
- Patent Title: Embedded SONOS based memory cells
- Patent Title (中): 嵌入式基于SONOS的存储单元
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Application No.: US14018026Application Date: 2013-09-04
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Publication No.: US08796098B1Publication Date: 2014-08-05
- Inventor: Krishnaswamy Ramkumar , Igor G. Kouznetsov , Venkatraman Prabhakar
- Applicant: Cypress Semiconductor Corporation
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: H01L21/336
- IPC: H01L21/336 ; H01L29/66 ; H01L29/792

Abstract:
Memory cells including embedded SONOS based non-volatile memory (NVM) and MOS transistors and methods of forming the same are described. Generally, the method includes: forming a dielectric stack on a substrate, the dielectric stack including a tunneling dielectric on the substrate and a charge-trapping layer on the tunneling dielectric; patterning the dielectric stack to form a gate stack of a NVM transistor of a memory device in a first region of the substrate while concurrently removing the dielectric stack from a second region of the substrate; and performing a gate oxidation process of a baseline CMOS process flow to thermally grow a gate oxide of a MOS transistor overlying the substrate in the second region while concurrently growing a blocking oxide overlying the charge-trapping layer. In one embodiment, Indium is implanted to form a channel of the NVM transistor.
Public/Granted literature
- US20140239374A1 EMBEDDED SONOS BASED MEMORY CELLS Public/Granted day:2014-08-28
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