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San Jose, CA, United States

Patent
HGST Inc | Date: 2015-08-31

A system and method are disclosed for storing data in a hash table. The method includes receiving data, determining a location identifier for the data wherein the location identifier identifies a location in the hash table for storing the data and the location identifier is derived from the data, compressing the data by extracting the location identifier; and storing the compressed data in the identified location of the hash table.


A method applies a first set of consecutive pulses to flash memory cells in one or more flash memory devices to program the flash memory cells using a first pulse increment, a voltage of each consecutive pulse of the first set being incremented by the first pulse increment. On receiving an indication that the flash memory cells are partially programmed after the first set of consecutive pulses is applied, the first pulse increment is adjusted to an adjusted pulse increment based on a number of program/erase cycles associated with the flash memory cells. A second set of consecutive pulses to the flash memory cells is then applied using the adjusted pulse increment, a voltage of each consecutive pulse of the second set being incremented by the adjusted pulse increment.


Patent
HGST Inc | Date: 2015-06-18

The present invention is a means and a method for speeding up the fabrication process, lowering the cost and improving yields. The present invention is a method for manufacturing memory cells in a diode memory array by utilizing selective epitaxial growth techniques to form high quality silicon for diodes and then lesser quality silicon to fill recesses and prepare the surface for subsequent planarization or etching steps.


Patent
HGST Inc | Date: 2015-09-14

A soft information module is coupled between one or more flash memory devices and a decoder. The soft information module receives a putative value of one or more memory cells of the one or more flash memory devices based on a read of the one or more memory cells at an initial read level, and one or more respective indicators of whether the putative value was read at one or more respective different read levels offset from the initial read level, and receives a page indicator for the read. The soft information module determines a cell program region for the read based on the putative value, the one or more respective indicators, and the page indicator, identifies a predetermined confidence value for the region, and provides the confidence value to the decoder for association with the putative value, the confidence value being representative of a likelihood that the one or more memory cells was programmed to the putative value.


Aspects of the subject technology relate to a method for reading information stored in a flash memory device. In some implementations, the method can include steps including, obtaining a first read signal of a first cell, wherein the first cell is located in a first word line and in a first bit line in the flash memory device, obtaining a programming level of a second cell, wherein the second cell is located in a second word line and in the first bit line, and wherein the second word line is adjacent to the first word line. In certain aspects, the method may further comprise steps for obtaining decoding information for the first cell based on the programming level of the second cell, wherein the decoding information is derived from a first set of reference voltage distributions corresponding to the obtained programming level of the second cell. A data storage system and a non-transitory machine readable storage medium are also provided.

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