A vertical-current-flow resistive element includes a monolithic region having a first portion and a second portion arranged on top of one another and formed from a single material. The first portion has a first resistivity, and the second portion has a second resistivity, lower than the first resistivity....http://www.google.es/patents/US6946673?utm_source=gb-gplus-sharePatente US6946673 - Integrated resistor, phase-change memory element including this resistor, and process for the fabrication thereof
Integrated resistor, phase-change memory element including this resistor ...
