Patent ID: 9202579
Filing Date: 2015-12-01
Classification: G11C

Abstract:
1. A method for performing a sense operation in a memory device, comprising: determining a block in which a non-volatile storage element is located, wherein the block is among a plurality of blocks, a bit line extends from a sense component to each of the plurality of blocks, the bit line is in communication with a drain of the non-volatile storage element, the plurality of blocks are arranged in a plurality of groups, and groups of the plurality of groups have unequal numbers of adjacent blocks from among the plurality of blocks; and sensing a state of the non-volatile storage element while compensating for a distance-based resistance and a temperature-based resistance of the bit line, the distance-based resistance is a function of a first distance of the bit line between the sense component and the block in which the non-volatile storage element is located, and the temperature-based resistance is a function of a temperature of the memory device and the first distance, wherein the compensating comprises applying a bit line voltage on the bit line, the bit line voltage has a rate of increase per degree C. of temperature which is relatively higher when the first distance is relatively greater, and the distance-based resistance and the temperature-based resistance are compensated for based on the group in which the non-volatile storage element is arranged. a bit line which extends from the sense component to each of the plurality of blocks, the bit line is in communication with a drain of the non-volatile storage element, the bit line comprises a segment which extends in the bit line direction, and a vertical segment which is connected to the sense component and the segment which extends in the bit line direction; a selected word line connected to a control gate of the selected non-volatile storage element; and a control circuit, the control circuit is configured to perform a sense operation for the selected non-volatile storage element, the sense operation provides compensation for a distance-based resistance and a temperature-based resistance of the bit line, the distance-based resistance is a function of a first distance of the bit line between the sense component and the block in which the non-volatile storage element is located, and the temperature-based resistance is a function of a temperature of the memory device and the first distance, wherein the control circuit, to provide the compensation, is configured to apply a control gate voltage to the control gate of the non-volatile storage element during the sense operation, the control gate voltage has a rate of decrease per degree C. of temperature which is relatively higher when the first distance is relatively smaller, and the first distance comprises a distance of the vertical segment and a distance of the segment which extends in the bit line direction.