Hi KSP,
I’m sorry, but do not worry, because SDSDQM-008G-B35 ( SanDisk 8GB microSDHC card), is excellent.
Link: http://www.sandisk.com/products/memory-cards/microsd/class4/?capacity=8GB
With respect to the cell structure, thought so, because SanDisk does not specify the topic (in card) on the official website.
But if, in SSD , links: http://www.sandisk.com/assets/docs/wp001_flash_management_final_final.pdf
                                  http://www.sandisk.com/assets/docs/wp003_guardian_technology_platform_final.pdf
                                 http://www.sandisk.com/goto/x300s/pdf/x300_datasheet.pdf
The company Kingston, does not specify the topic (in card), on their official website.
The company Panasonic, has an industrial line (in SD card, made in Japan).
Link: http://panasonic.net/avc/sdcard/industrial_sd/lineup.html
Luck.
Regards, Alfred. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (Google translated)