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Method, flash memory controller, memory device for accessing 3D flash memory having multiple memory chips

  • US 10,510,430 B2
  • Filed: 05/15/2018
  • Issued: 12/17/2019
  • Est. Priority Date: 04/27/2016
  • Status: Active Grant
First Claim
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1. A method for accessing a flash memory module being a 3D flash memory module including a plurality of flash memory chips, each flash memory chip including a plurality of blocks which include a plurality of multiple-level cell blocks, each block including a plurality of data pages and including a plurality of word lines respectively disposed on a plurality of different planes and a plurality of floating transistors controlled by a plurality of bit lines, floating transistors on each bit line forming at least one page among the plurality of data pages;

  • and the method comprises;

    configuring and planning the flash memory chips so that the flash memory chips include at least one super block; and

    allocating a buffer memory space for storing multiple sets of temporary parity check codes generated by an encoding procedure during programming data into the at least one super block;

    wherein each flash memory chip of the 3D NAND-type flash memory module has a plurality of 3D stacked planes;

    all word lines disposed on a same 3D stacked plane are classified into a same word line set, and word lines on different 3D stacked planes are respectively classified into different word line sets;

    all word line sets on the different 3D stacked planes are classified into a group of multiple odd word line sets and a group of multiple even word line sets; and

    , at least one set of parity check codes is generated for data disposed on particular word lines associated with a same order respectively comprised within different non-adjacent word line sets, the different non-adjacent word line sets being the multiple odd word line sets or the multiple even word line sets, the different non-adjacent word line sets comprising odd and even word lines of a first word line set and odd and even word lines of a second word line set that is not adjacent to the first word line set.

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