Invention Grant
- Patent Title: Method of erasing a block of memory cells
- Patent Title (中): 擦除存储单元块的方法
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Application No.: US12168863Application Date: 2008-07-07
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Publication No.: US07791955B2Publication Date: 2010-09-07
- Inventor: Nirmal Ratnakumar , Venkatraman Prabhakar , David Kuan-Yu Liu
- Applicant: Nirmal Ratnakumar , Venkatraman Prabhakar , David Kuan-Yu Liu
- Applicant Address: US CA Sunnyvale
- Assignee: Maxim Integrated Products, Inc.
- Current Assignee: Maxim Integrated Products, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Fountain Law Group, Inc.
- Agent George L. Fountain
- Main IPC: G11C11/34
- IPC: G11C11/34

Abstract:
A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line. The control gate NMOS includes source, drain, and gate, wherein the source and third drain as well as the p-doped pocket are electrically connected to a corresponding control gate line, and the gate is electrically connected to the gate of the program/erase PMOS, forming floating gate of the cell.
Public/Granted literature
- US20080273401A1 METHOD OF ERASING A BLOCK OF MEMORY CELLS Public/Granted day:2008-11-06
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