Ferroelectric media includes a media surface that is scannable by a contact. The contact provides a read signal. A polarization pattern is written in first regions of the media surface. The polarization pattern represents position data. The first regions are selectively exposed to an energy source. The...http://www.google.es/patents/US7782741?utm_source=gb-gplus-sharePatente US7782741 - Probe-scanned ferroelectric media with imprinted regions
Probe-scanned ferroelectric media with imprinted regions
