Resources Contact Us Home
MONOS flash memory for multi-level logic and method thereof

Image Number 11 for United States Patent #6166410.

The present invention provides a structure and method of manufacturing split gate MONOS multi-level logic memory device. The memory device has a poly stacked gate transistor 20A in series with a MONOS transistor 24A. The device has a novel operation to achieve multi-level memory storage (e.g., 4 voltage states). The method begins by forming a tunnel oxide layer 30 on the surface of a semiconductor substrate 10. The substrate having a stacked gate channel area 20 and a MONOS channel area 24 in the active regions. A poly floating gate electrode 32 is formed over the stacked gate channel region 20. A ONO layer having a memory nitride layer is formed over the floating gate 32 and the tunnel oxide layer over the MONOS channel region 24. A control gate electrode 44 is formed over the ONO layer 41 spanning across the poly floating gate electrode 32 and the MONOS channel region 24. Source/drain regions 50 51 are formed in the substrate. A poly flash transistor 20A and a MONOS flash transistor 24A combine to form the 4 level logic memory cell of the invention.

  Recently Added Patents
Bus controller for handling split transactions
Image processing apparatus and image processing method
Device chip carriers, modules, and methods of forming thereof
Implementing state-of-the-art gate transistor, sidewall profile/angle control by tuning gate etch process recipe parameters
MOS device for eliminating floating body effects and self-heating effects
3D IC method and device
Techniques for generating and displaying a visual flow of user content through a social network
  Randomly Featured Patents
Cosmetic container
System and method for device co-location discrimination
Benzothiazolones, and their production and use
Portable electric hammer drill
Method of manufacturing X-ray resist
Balustrade for passenger conveyer
Current limiting device and circuit interrupter having a current limiting function
Monoalkenylation of alkylbenzenes in a fixed catalyst bed
Procedure to obtain the diamond effect in a precious metal product, particularly as in a chain with hollow links and a chain obtained according to said method
Color image reproduction of scenes with preferential color mapping and scene-dependent tone scaling