A memory system includes a first signal line to carry a first signal that enters the module at a first end of the first signal line and a second signal line to carry a second signal that enters the module at a first end of the second signal line. The module includes a first memory device disposed on...http://www.google.es/patents/US7523246?utm_source=gb-gplus-sharePatente US7523246 - Memory system having memory devices on two sides
