SEMICONDUCTOR MEMORY AND CONTROL METHOD FOR THE SAME

• Main Authors: MITANI YUICHIRO, TODA HARUKI, MUROOKA KENICHI, TORIYAMA SHUICHI, HIGASHI YUSUKE, TAKASE SATORU
• Format: Patent
• Language: English
• Published: 05.09.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INFORMATION STORAGE; PHYSICS; SEMICONDUCTOR DEVICES; STATIC STORES

PROBLEM TO BE SOLVED: To provide a countermeasure technique against heat that takes into account local temperature distribution at the time of actual operation.SOLUTION: A semiconductor memory comprises: a memory cell array that is provided with a plurality of blocks disposed in a matrix of n×m (where both of n and m are natural numbers equal to or more than 2) and allows respective ones of the plurality of blocks to independently perform operation of writing, reading or erasure; and a control section that performs a first cycle for performing the operation of writing, reading or erasure with respect to a first block out of the plurality of blocks and performs a second cycle for setting the inside of a range with a constant distance from the first block to a selection prohibition region, setting regions other than a selection region out of the plurality of blocks to a second block and performing the operation of writing, reading or erasure with respect to the second block until temperature relaxation time for relaxing a temperature in and around the first block increased by performing the first cycle elapses.