We developed a new technology for writing and reading a tape which shows good perspectives for very high track density recording. The key elements of this new technology are:-parallel recording of a large number of tracks thanks to a matrix head structure creates macro tracks which are significantly wider than the guardband separating adjacent macrotracks,-optical detection of the magnetic flux flowing in the reading core thanks to Kerr effect allows high transverse resolution and precise track following,-parallel readout of adjacents bits allows efficient electronic crosstalk compensation,-serpentine structure, allows recording of a very large number of tracks on wide tape without requiring stringent precision on tape stability and mechanical positioning.