Compression of content entries in storage for replacing faulty memory cells
First Claim
1. A method of manufacturing a dynamic random access memory device, the method comprising:
- testing a DRAM device using a testing process, the DRAM device comprising a plurality of memory arrays, each of the plurality of memory arrays comprising a plurality of memory cells;
identifying, under control by a computing device, a plurality of bad memory cells from the DRAM device;
determining a list of addresses associated with the plurality of bad memory cells from the DRAM device;
sorting the list of address in either ascending or descending order;
subjecting the information from the sorted list of addresses to a compression process, under control by the computing device, to provide a compressed format including a first content entry in the sorted list and a series of off-set values as provided by a recurrence relationship; and
storing the compressed format into a non-volatile memory.
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Accused Products
Abstract
A method of manufacturing a dynamic random access memory device is provided. The method includes testing a DRAM device using a testing process. The method includes identifying, under control by a computing device, a plurality of bad memory cells from the DRAM device and determining a list of addresses associated with the plurality of bad memory cells. The method includes sorting the list of addresses in either ascending or descending order and subjecting the information from the sorted list of address to a compression process, under control by the computing device, to provide a compressed format including a first content entry in the sorted list and a series of off-set values as provided by a recurrence relationship. The method also stores the compressed format into a non-volatile memory.
23 Citations
21 Claims
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1. A method of manufacturing a dynamic random access memory device, the method comprising:
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testing a DRAM device using a testing process, the DRAM device comprising a plurality of memory arrays, each of the plurality of memory arrays comprising a plurality of memory cells; identifying, under control by a computing device, a plurality of bad memory cells from the DRAM device; determining a list of addresses associated with the plurality of bad memory cells from the DRAM device; sorting the list of address in either ascending or descending order; subjecting the information from the sorted list of addresses to a compression process, under control by the computing device, to provide a compressed format including a first content entry in the sorted list and a series of off-set values as provided by a recurrence relationship; and storing the compressed format into a non-volatile memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of manufacturing a dynamic random access memory cell, the method comprising:
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testing a DRAM device using a testing process, the DRAM device comprising a plurality of memory arrays, each of the plurality of memory arrays comprising a plurality of memory cells; identifying, under control by a computing device, a plurality of bad memory cells from the DRAM device; determining a list of addresses associated with the plurality of bad memory cells from the DRAM device; sorting the list of addresses in either an ascending or a descending order; subjecting the information from the sorted list of addresses to a compression process, under control by the computing device, to provide a compressed format including a first content entry in the sorted list and a series of off-set values as provided by a recurrence relationship; storing the compressed format into a non-volatile memory; initiating a process to decompress the compressed format; and loading the list of addresses in an address match table for use in replacing bad memory cells with spare memory cells. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A module apparatus, the apparatus comprising:
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a non-volatile memory device comprising an address listing of a plurality of bad memory cells of a memory device, the address listing being configured as a compressed format including a first content entry in a sorted list of the address listing and a series of off-set values as provided by a recurrence relationship; and an address match table configured for receiving the address listing from the non-volatile memory device in an uncompressed format from the compressed format. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification