Patent ID: 7254058
Filing Date: 2007-08-07
Classification: G11C

Abstract:
1. A thin film magnetic memory device comprising: a plurality of magnetic memory cells permitting random accesses; and a program circuit storing information in a fixed manner; wherein each of said plurality of magnetic memory cells includes a tunneling magneto-resistance element formed of a plurality of layers including a conductive magnetic film and an insulating film and having a resistance changed in accordance with magnetically written data, said program circuit includes a first program element connected between first and second nodes, and formed of said plurality of layers as with said tunneling magneto-resistance element, an amplifier portion reading said information in accordance with a resistance between said first and second nodes, and a first breakdown voltage apply portion applying a first voltage stress capable of causing breakdown of said insulating film in said plurality of layers constituting said first program element, between said first and second nodes as appropriate, an upper layer side and a lower layer side of said plurality of layers constituting said first program element are electrically connected to one and the other of said first and second nodes, and said first program element is shaped such that at least a portion of its portion electrically connected between said first and second nodes is fusible with a first external input, wherein said first external input is applied before a packaging step of said thin film magnetic memory device, and said first voltage stress for breaking said insulating film is applied after said packaging step of said thin film magnetic memory device.