One of the simplest forms of data storage devices is the diode array storage device. However, a problem with diode array storage devices is that as the size of the array increases, the number of non-addressed diodes connected between a given selected row or column of the array and the non-addressed columns...http://www.google.com.au/patents/US7652916?utm_source=gb-gplus-sharePatent US7652916 - SCR matrix storage device
