Patent ID: 11881271
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A non-volatile storage apparatus, comprising:
a block of non-volatile memory cells arranged as NAND strings, the block includes multiple sub-blocks and a plurality of word lines connected to NAND strings of all sub-blocks of the block; and
a control circuit connected to the block, the control circuit is configured to read data from a plurality of non-volatile memory cells connected to a selected word line and on a plurality of NAND strings of a selected sub-block by:
raising voltages of word lines connected to NAND strings of the block, the word lines including the selected word line and unselected word lines,
after the raising of voltages of word lines connected to NAND strings of the block, lowering a voltage of the selected word line and voltages of unselected word lines nearby the selected word line to respective intermediate voltages,
after the lowering of the voltage of the selected word line and voltages of unselected word lines, raising the voltage of the selected word line to a read compare voltage and raising voltages of the unselected word lines nearby the selected word line to respective pass gate voltages,
sensing the plurality of non-volatile memory cells in response to the read compare voltage, and
floating NAND strings of unselected sub-blocks during the raising of voltages of word lines connected to NAND strings of the block, the lowering of a voltage of the selected word line and voltages of unselected word lines nearby the selected word line to respective intermediate voltages, the raising of the voltage of the selected word line to the read compare voltage, and the raising of voltages of the unselected word lines nearby the selected word line to respective pass gate voltages.