Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8351240 | Phase change memory device having multi-level and method of driving the same A phase change memory device having a multi-level and a method of driving the same are presented. The disclosed phase change memory device includes variable resistors and shifting units. The variable resistors are interchanged into set and reset states in response t... | 01/08/2013 |
| 8349636 | Method of manufacturing a phase change memory device using a cross patterning technique A method of manufacturing a phase change memory device is provided. A first insulating layer having a plurality of metal word lines spaced apart at a constant distance is formed on a semiconductor substrate. A plurality of line structures having a barrier metal laye... | 01/08/2013 |
| 8159869 | Circuit and method for generating reference voltage, phase change random access memory apparatus and read method using the same A circuit for generating a reference voltage includes at least one reference cell, a reference cell write driver, a reference cell sense amplifier, and a voltage compensation unit. The reference cell is a variable resistance memory cell. The reference cell write dri... | 04/17/2012 |
