Invention Grant
US08796098B1 Embedded SONOS based memory cells 有权
嵌入式基于SONOS的存储单元

Embedded SONOS based memory cells
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.
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