US Patent 7626869 Multi-phase wordline erasing for flash memory

Patent 7626869 was granted and assigned to Spansion on December, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Spansion

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76268690

Patent Inventor Names

Zhizheng Liu0

Timothy Thurgate0

Xuguang Wang0

Yi He0

Ashot Melik-Martirosian0

Darlene G. Hamilton0

Gulzar Kathawala0

Mark Randolph0

...

Date of Patent

December 1, 2009

Patent Application Number

117453270

Date Filed

May 7, 2007

Patent Primary Examiner

‌

Michael T. Tran

Patent abstract

Erasing wordlines at the same time can cause undesirable results because some wordlines are affected by electromagnetic waves of other wordlines. However, other wordlines are not affected because they are next to contacts. Therefore, it can be beneficial to erase wordlines in a multi-phase sequence that allows for erasing wordlines without an impact from other wordlines.