| 摘要 |
PROBLEM TO BE SOLVED: To provide a MRAM array having magnetic environment being uniform for all memory cells in a array. SOLUTION: This device is a magnetic memory (10) having uniform magnetic environment. The magnetic memory comprises a dummy magnetic cell (D), the dummy magnetic cells are electrically inactive but have a magnetic properties that are substantially identical to active magnetic memory cells (I, P) in the magnetic memory. Some of the magnetic memory cells are arranged in an interior of the array (20) and are surround on all sides by adjacent magnetic memory cells so that a cell in an interior position is exposed to a first uniform magnetic environment. Other magnetic memory cells are positioned at a perimeter of the array. The dummy magnetic cells are positioned adjacent to the magnetic memory cells at the perimeter so that the perimeter magnetic memory cells are exposed to a second uniform magnetic environment that is substantially identical to the first uniform magnetic environment. As a result, the magnetic memory (10) has a uniform magnetic environment across the entire array and the switching characteristics of the magnetic memory cells (I, P) in the array are made uniform. COPYRIGHT: (C)2003,JPO
|
