A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer...http://www.google.com.hk/patents/US6434034?utm_source=gb-gplus-share專利 US6434034 - Computer memory cards using flash EEPROM integrated circuit chips and memory-controller systems