AT25SF041B : Block Erase Time after 500 Cycles - Temperature Influence?

Dear Renesas Team,

During a lifetime test of our product, we observed that the block erase time (4kb) increased from approximately 60ms to 600ms after 500 erase cycles. The test duration was 40 days at a temperature of 50°C.

Could you please inform us about the potential factors contributing to this aging? Is there a known impact of temperature when combined with the number of erase cycles? Do you have any data on how the erase time increases over the lifetime?

Best regards,