Memory characteristics of 2.2-mil plated-wire memory

To obtain lower drive requirements and higher densities, plated-wire memory must use thinner films on smaller diameter substrate. The memory element characteristics of thin (1000-3000 Å) Permalloy film on 2.2-mil tungsten wire substrate are reported here. Nondestructive readout as well as destructive read-out properties and the effect of a simple keeper structure will be described. The determination of a valid test program in terms of pulse aud Belsen tests will also be discussed.