Patent ID: 9608000
Date: 2017-03-28
CPC Classifications: H01L

Claim:
1. A device comprising: a first polysilicon material; an etch stop material on the first polysilicon material; a second polysilicon material on the etch stop material; a first tier dielectric material on the second polysilicon material; a first control gate over the etch stop material and on the first tier dielectric material; a first control gate recess adjacent the first control gate; a trench adjacent the first control gate recess; an at least partially oxidized polysilicon on at least a portion of the etch stop material, wherein the at least partially oxidized polysilicon lines a sidewall of the trench and lines the first control gate recess, the at least partially oxidized polysilicon in contact with the control gate; a nitride in contact with the at least partially oxidized polysilicon and in the first control gate recess, the at least partially oxidized polysilicon between the nitride and the first control gate; a dielectric in contact with the at least partially oxidized polysilicon and in the first control gate recess, the nitride between the dielectric and the at least partially oxidized polysilicon; a floating gate in contact with the at least partially oxidized polysilicon and in the first control gate recess, the dielectric between the floating gate and the nitride; and a tunnel oxide adjacent the floating gate.