READ-ONLY MAGNETIC MEMORY DEVICE MROM

摘要

A storage device has an information carrier part (10) and a read-out part (30). The information carrier part (10) is provided with a pattern of an electro-magnetic material constituting an array of bit locations (11) and the presence or absence of said material at the information plane represents the logical value. The read-out part has a two-dimensional array (31) of electro-magnetic sensor elements that are sensitive to the presence of said electro-magnetic material on a near-field working distance. During manufacture the parts are fixedly coupled and aligned for positioning the bit locations opposite the sensor elements.