Method of forming semiconductor memory device by selectively for

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

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438264, 438261, H01L 218247

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active

056292228

ABSTRACT:
A semiconductor memory device capable of being electrically written and erased comprising a floating gate, wherein, a silicon nitride film is incorporated between the drain region and the floating gate. Also claimed is a method for forming the same, which comprises forming a drain region on selected portions of a semiconductor substrate; forming a silicon nitride film or a silicon oxinitride film or a silicon carbide film or an aluminum oxide film selectively on the drain region; coating the substrate with a gate oxide film; and establishing a floating gate and thereafter a control gate.

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