Patent ID: 11882699
Assignee: WINBOND ELECTRONICS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A silicon-oxide-nitride-oxide-silicon (SONOS) memory cell for FinFET, comprising:
a fin on a top surface of a substrate, wherein the fin has two sidewalls and a top surface, and the fin comprises a memory region and a logic region;
a control gate disposed over the fin of the memory region and covering the two sidewalls and the top surface of the fin, wherein the control gate comprises a charge trapping layer and a control electrode, wherein the charge trapping layer is sandwiched by the fin and the control electrode;
a selective metal gate disposed over the fin adjacent to the control gate and covering the two sidewalls and the top surface of the fin, the selective metal gate comprising a gate oxide layer; and
an insulator, disposed between the selective metal gate and the control gate, to separate the selective metal gate from the control gate, wherein the insulator and the gate oxide layer are in one piece with a L-shape, and the insulator directly contacts a sidewall of the control electrode.