Patent ID: 8071396

Claim:
A method of fabricating an embedded phase-change memory, comprising: forming a collector and a collector connection layer of a bipolar transistor, and a well of a MOS transistor, in a substrate; forming an insulating layer on the substrate outside the bipolar transistor and the MOS transistor; forming a gate insulating layer on the collector, the collector connection layer, and the well; forming a gate electrode on the gate insulating layer over the well to form the MOS transistor; removing the gate insulating layer on the collector and the collector connection layer; forming a base composed of SiGe on the collector where the gate insulating layer was removed; forming an emitter electrode on the base, and a collector electrode on the collector connection layer, to form the bipolar transistor forming a heating layer composed of SiGe on the insulating layer simultaneously with forming the base composed of SiGe; forming a phase-change memory device by forming a phase-change material layer contacting the heating layer, wherein the bipolar transistor, the phase change memory device, and the MOS transistor are formed next to each other and directly connected to one another on the substrate.