Patent ID: 8897079

Claim:
A non-volatile semiconductor memory comprising: a global bit line; a local bit line, that defines a sector, connected to the global bit line; a sector select transistor connected to the local bit line; a sector select line, that controls on/off state of the sector select transistor, connected to the sector select transistor; a word line that intersects the local bit line; a source line; a memory cell located at intersection between the local bit line and the word line, the memory cell connecting the source line with the local bit line; an n-channel memory transistor, that is turned on/off by the word line, included in the memory cell; a charging line to which a precharge voltage is applied; a charging transistor connected to the local bit line and the charging line; a charging gate line that controls on/off state of the charging transistor; and control circuits that include a bit line control circuit that controls electric signal applied to the global bit line, a sector control circuit that controls electric signal applied to the sector select line, a word line control circuit that controls electric signal applied to the word line, a source line control circuit that controls electric signal applied to the source line, a charging line control circuit that controls electric signal applied to the charging line, and a charging gate line control circuit that controls electric signal applied to the charging gate line.