MRAM and methods for manufacturing and driving the same

A method of driving an MRAM in which a bipolar junction transistor is disposed on a semiconductor substrate, a bit line is coupled to an emitter of the bipolar junction transistor, a magnetic tunneling junction layer is coupled to the bipolar junction transistor, a word line is coupled to the magnetic tunneling junction layer, a plate line is coupled to the bipolar junction transistor so as to be spaced apart from the magnetic tunneling junction layer, and an interlayer dielectric is formed between components of the MRAM, wherein the magnetic tunneling junction layer is coupled to a base and a collector of the bipolar junction transistor, and the plate line is coupled to the collector, the method comprising:

• recording a first data by applying current to the word line and the bit line;
• and
• recording a second data by applying current to the word line in an opposite direction to the direction in which current is applied to the word line and the bit line when the first data is recorded, and applying current to the bit line in any direction.

A method of driving an MRAM in which a bipolar junction transistor is disposed on a semiconductor substrate, a bit line is coupled to an emitter of the bipolar junction transistor, a magnetic tunneling junction layer is coupled to the bipolar junction transistor, a word line is coupled to the magnetic tunneling junction layer, a plate line is coupled to the bipolar junction transistor so as to be spaced apart from the magnetic tunneling junction layer, and an interlayer dielectric is formed between components of the MRAM, wherein the magnetic tunneling junction layer is coupled to a base and a collector of the bipolar junction transistor, and the plate line is coupled to the collector, the method comprising:

• applying a positive voltage to the word line and applying a positive voltage to the plate line;
• and
• reading out data recorded in the magnetic tunneling junction layer by sensing an output data signal from an amplifying unit, which is coupled to the bit line.