Claims
- 1. A FLASH EPROM cell comprising:
- a Flash device including a source, a drain and a gate; and
- a constant current source means coupled to the source, the constant current source means for ensuring that a constant field is applied to tunneling oxide of the FLASH EPROM cell during erasure thereof.
- 2. A constant field erasure system comprising:
- a FLASH device including a source, a drain and a gate;
- a power supply for supplying current; and
- a constant current source means coupled between the source and the power supply during erasure of the FLASH device, the constant current source means for ensuring that a constant field is applied to tunneling oxide of the FLASH device, thereby improving the endurance of the FLASH device.
- 3. A constant field erasure system comprising:
- a plurality of FLASH device cells; each of the FLASH device cells comprising a source, a drain and a gate;
- a power supply for supplying current; and
- a constant current source means coupled between the source of each of the FLASH device cells and the power supply during erasure of the FLASH device cells for ensuring that a constant field is applied to the source/drain region of each of the FLASH device cells, thereby improving the endurance of the FLASH device cells.
Parent Case Info
This is a continuation of application Ser. No. 08/634,512 filed on Apr. 18, 1996 now U.S. Pat. No. 5,390,893 which is a FWC of Ser. No. 08/440,046 filed on May 12, 1995, now abandoned.
US Referenced Citations (5)
Continuations (2)
|
Number |
Date |
Country |
Parent |
634512 |
Apr 1996 |
|
Parent |
440046 |
May 1995 |
|