A memory array includes a semiconductor substrate, an isolation trench disposed in the substrate, and a conductor that is disposed in the trench. The array also includes a memory cell that is coupled to the conductor in the trench. The conductor may be a digit line that is coupled to a source/drain region...http://www.google.com.au/patents/US5892707?utm_source=gb-gplus-sharePatent US5892707 - Memory array having a digit line buried in an isolation region and method for forming same
