Patent ID: 11914887
Assignee: MACRONIX INTERNATIONAL CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. The data accessing method according to claim 14, wherein the four bits of data of each of the quad-level cells are (1 1 1 1)2, (1 1 1 0)2, (1 1 0 0)2, (1 0 0 0)2, (1 0 1 0)2, (1 0 1 1)2, (1 0 0 1)2, (1 1 0 1)2, (0 1 0 1)2, (0 0 0 1)2, (0 0 0 0)2, (0 0 1 0)2, (0 0 1 1)2, (0 1 1 1)2, (0 1 1 0)2 or (0 1 0 0)2 respectively corresponding to a plurality of threshold voltage distributions Vt(1,1,1,1), Vt(1,1,1,0), Vt(1,1,0,0), Vt(1,0,0,0), Vt(1,0,1,0), Vt(1,0,1,1), Vt(1,0,0,1), Vt(1,1,0,1), Vt(0,1,0,1), Vt(0,0,0,1), Vt(0,0,0,0), Vt(0,0,1,0), Vt(0,0,1,1), Vt(0,1,1,1), Vt(0,1,1,0) and Vt(0,1,0,0), and the threshold voltage distributions Vt(1,1,1,1), Vt(1,1,1,0), Vt(1,1,0,0), Vt(1,0,0,0), Vt(1,0,1,0), Vt(1,0,1,1), Vt(1,0,0,1), Vt(1,1,0,1), Vt(0,1,0,1), Vt(0,0,0,1), Vt(0,0,0,0), Vt(0,0,1,0), Vt(0,0,1,1), Vt(0,1,1,1), Vt(0,1,1,0) and Vt(0,1,0,0) are arranged in an order from low voltage to high voltage.