An MRAM device includes a substrate; plural conductive lines, including a bit line and a word line; and a MTJ stack including a pair of magnetic yoke structures, wherein each of said yoke structures surrounds a conductive line. A method of fabricating a magnetic yoke in an MRAM structure includes preparing...http://www.google.com.tw/patents/US20030168684?utm_source=gb-gplus-share專利 US20030168684 - Method of fabricating magnetic yoke structures in MRAM devices
