The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Jun. 11, 2019
Sandisk Technologies Llc, Addison, TX (US);
Phil Reusswig, San Jose, CA (US);
Pitamber Shukla, San Jose, CA (US);
Sarath Puthenthermadam, San Jose, CA (US);
Mohan Dunga, San Jose, CA (US);
Sahil Sharma, San Jose, CA (US);
Rohit Sehgal, San Jose, CA (US);
Niles Yang, San Jose, CA (US);
SanDisk Technologies LLC, Addison, TX (US);
Abstract
A non-volatile memory system and corresponding method of operation are provided. The system includes non-volatile memory cells, each retaining a threshold voltage within a threshold window. The non-volatile memory cells include multi-bit cells each configured to store a plurality of bits of data with the threshold window partitioned into bands each having a band width. The bands include a lowest band denoting an erased state and increasing bands. A control circuit programs a first set of the data into the multi-bit cells in a single-bit mode using first target states being one of the erased state and a tight intermediate state having a distribution of the threshold voltage no wider than the band width of one of the increasing bands. The control circuit also programs a second set of the data into the multi-bit cells in a multi-bit mode with each of the multi-bit cells storing the plurality of bits.