READ-WRITE NON-ERASABLE MEMORY WITH LASER RECORDING AND METHOD OF RECORDING

摘要

A nonvolatile memory comprising at least one ferromagnetic region having permeability which changes from a first state to a second state of lower permeability upon heating; at least one laser operatively associated with the at least one ferromagnetic region which selectively provides heat to the ferromagnetic region to change its p permeability; and a plurality of connectors operatively connected to the at least one laser and adapted to be connected to a current source that provides a current which causes the laser to change the at least one ferromagnetic region from a first state to a second state. Optionally, the memory is arranged as an array of memory cells. Optionally, each cell has a magnetic field sensor operatively associated therewith. Optionally, the nonvolatile memory is radiation hard. Also, a method of recording data by heating at least one ferromagnetic region to change its permeability.

主权项

1. A memory system for storing information comprising:
a substrate; magnetic material operatively associated with the substrate, the magnetic material having at least one ferromagnetic region configured to store data having a first state of high permeability and a second state of low permeability; the at least one ferromagnetic region in the first state configured to be modifiable to a state of low permeability upon heating to permit modification of the bits of data; at least one laser operatively associated with the at least ferromagnetic region which selectively provides heat to the at least one ferromagnetic region to change its permeability; and a plurality of connectors operatively connected to the laser and adapted to be connected to a current source that provides a current which causes the laser to emit light that heats to change the permeability of the at least one ferromagnetic region.