Sandisk Technologies Inc.

Akira Hanasaka

Hardwell Chibvongodze

Alvin Joshua

Yuki Kuniyoshi

Akitomo Nakayama

Technology is for managing non-volatile memory such as NAND memory. A memory system that programs the threshold voltages (Vt) of transistors on NAND strings to enable selection of sub-blocks without physically separate select lines in a block. A first set of one or more transistors on a NAND string may be programmed to a higher Vt and a second set of one or more transistors on the NAND string may be programmed to a lower Vt. Each NAND string in a sub-block may have the same pattern of high Vt and low Vt transistors. However, each sub-block has its own pattern of high Vt and low Vt transistors to enable selection of the sub-blocks. To select NAND strings in a sub-block, a high voltage is applied to a first set of the conductive lines and a low voltage is applied to a second set of the conductive lines.

Growing community of inventors

Fujisawa, Japan

Akira Hanasaka