Search

Jens Holzhaeuser Phones & Addresses

  • Richmond, VA

Publications

Us Patents

Method Of And System For Analyzing Cells Of A Memory Device

View page
US Patent:
20050149285, Jul 7, 2005
Filed:
Dec 30, 2003
Appl. No.:
10/749460
Inventors:
Joerg Wohlfahrt - Taipei, TW
Thomas Hladschik - Leca da Palmeira, PT
Jens Holzhaeuser - Richmond VA, US
Dieter Rathei - Graz, AT
International Classification:
G06F019/00
US Classification:
702118000
Abstract:
A method of analyzing cells of a memory device is disclosed. The method generally comprises steps of establishing a plurality of fail signatures, wherein each fail signature is associated with a type of failure. Voltages according to a plurality of test patterns are applied to nodes of a cell of the memory device. Fail data of the cell for the plurality of patterns is then analyzed, and a fail signature of the cell is determined. A type of failure of the cell based upon the plurality of fail signatures is then determined. A system for analyzing cells of a memory device is also disclosed. The system preferably comprises a plurality of probes applying different voltages to a cell of the memory device. A control circuit varies the voltages applied to the cell, and compares the failures of the cell as the test voltage applied to the cell is varied to an artificial bit map. Finally, an output device generates an output indicating a type of failure of the cell.
Jens Holzhaeuser from Richmond, VA, age ~56 Get Report