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Implement double programming to mitigate pSCBL returns

Posted: 16 Sep 2008     Print Version  Bookmark and Share

Keywords:pseudo single bit charge loss  pSBCL failure  Single Bit Charge Loss  Double Programming 

Spansion LLC ships automotive grade floating gate flash memory devices to many market segments through out the world. Automotive, aerospace and some other markets typically make necessary investments to improve system reliability. Along this line, this document recommends steps to mitigate pseudo single bit charge loss (pSBCL) returns. This application note also includes information such as pSBCL failure analysis data from Spansion's CCARs analysis team, real customer implementation expectations, experiences and questions.

This application note aims to clarify the differences between Single Bit Charge Loss(SBCL) and pSBCL. It also provides information about pSBCL as an application induced failure and not a device-related failure. The occurrence of pSBCL is a rare phenomenon resulting in a very low ppm failure rate. Given this low occurrence of pSBCL, there are many customers who are not willing to implement the recommended corrective action "Double Programming". The target customers are those who have strong quality goals to eliminate re-occurrence of an identified failure mode.

View the PDF document for more information.

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