Essencore and Choi Young Joon Assigned Patent

Essencore Ltd., Wanchai, Hong Kong, and Choi, Young Joon, Gyeonggi-do, Korea, has been assigned a patent (10,790,035) developed by Choi, Young Joon, and Kwon, Seok Cheon, Gyeonggi-do, Korea, for a “method of operating storage device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Disclosed is a method of operating a storage device including a NAND flash memory including memory cells grouped into blocks, each block being divided into pages. According to the method, a controller in the storage device loads, onto a memory region, a look-up table containing first read reference voltage sets corresponding to respective retention degradation stages of the NAND flash memory and second read reference voltages sets corresponding to respective pages which vary in terms of the threshold voltages. Subsequently, the controller performs a read operation on the memory cells on a per-block basis by using the first read reference voltage set corresponding to a current retention degradation stage, the second read reference voltage set corresponding to a current page, or both, until all of the memory cells in a current block are correctly read.”

The patent application was filed on May 30, 2018 (15/993,043).