A device with magnetic heads for the recording of items of information on a magnetic medium, such as a tape, is disclosed. The magnetic heads are arranged in the form of a matrix network, which is preferably plane. For the excitation of each head, there is provision for a network of conducting wires...http://www.google.com/patents/US5124869?utm_source=gb-gplus-sharePatent US5124869 - Matrix device with magnetic heads, notably in thin layers
