IP Library Granted Patent US 10,115,437
Granted Patent B1
US 10,115,437 · App. 15/661,882 · Granted Oct 30, 2018

Storage system and method for die-based data retention recycling

Inventors: Jingfeng Yuan (Irvine, CA); James M. Higgins (Irvine, CA); Jeff Whaley (Irvine, CA)
Assignee: Western Digital Technologies, Inc.
G11C5/005G11C7/04G11C7/24G11C11/40626G11C29/12
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Quick Facts
Patent No.
US 10,115,437
App. No.
15/661,882
Granted
Oct 30, 2018
Kind
B1
Abstract

A storage system and method for die-based data retention recycling are provided. In one embodiment, a storage system comprises a controller and a plurality of memory dies. Each of the plurality of memory dies comprises its own temperature sensor, wherein at least one of the memory dies is characterized by a relatively lower endurance than at least one other of the memory dies, and wherein the at least one of the memory dies with the relatively lower endurance is positioned farther away from the controller than the at least one other of the memory dies.

Claims (12)

1. A storage system comprising:

a controller; and

a plurality of memory dies in communication with the controller, wherein each of the memory dies comprises its own temperature sensor, wherein at least one of the memory dies is characterized by a relatively lower endurance than at least one other of the memory dies, and wherein the at least one of the memory dies with the relatively lower endurance is positioned farther away from the controller than the at least one other of the memory dies.

2. The storage system of claim 1 , wherein the storage system is associated with a product line characterized by a temperature profile.

3. The storage system of claim 2 , wherein the plurality of memory dies are positioned on a printed circuit board based on the temperature profile.

4. The storage system of claim 1 , wherein the controller is further configured to:

write data that is likely to be changed after it is written to a memory die having a relatively higher temperature than another memory die; and

write data that is less likely to be changed after it is written to a memory die having a relatively lower temperature than another memory die.

5. The storage system of claim 4 , wherein the controller is further configured to sort the plurality of memory dies into groups based on temperature.

6. The storage system of claim 1 , wherein at least one of the plurality of memory dies comprises a three-dimensional memory.

7. The storage system of claim 1 , wherein the storage system is embedded in a host.

8. The storage system of claim 1 , wherein the storage system is removably connected to a host.

Assignments (10)
PARTIAL RELEASE OF SECURITY INTERESTS Recorded Apr 25, 2025
From: JPMORGAN CHASE BANK, N.A., AS AGENT
To: SANDISK TECHNOLOGIES, INC.
Reel/Frame 071382/0001 →
SECURITY AGREEMENT Recorded Apr 25, 2025
From: SANDISK TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 071050/0001 →
PATENT COLLATERAL AGREEMENT Recorded Aug 23, 2024
From: SANDISK TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS THE AGENT
Reel/Frame 068762/0494 →
CHANGE OF NAME Recorded Jun 27, 2024
From: SANDISK TECHNOLOGIES, INC.
To: SANDISK TECHNOLOGIES, INC.
Reel/Frame 067982/0032 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 29, 2024
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: SANDISK TECHNOLOGIES, INC.
Reel/Frame 067567/0682 →
PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 067045/0156 →
PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 064715/0001 →
RELEASE OF SECURITY INTEREST AT REEL 052915 FRAME 0566 Recorded Feb 8, 2022
From: JPMORGAN CHASE BANK, N.A.
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 059127/0001 →
SECURITY INTEREST Recorded Feb 6, 2020
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS AGENT
Reel/Frame 052915/0566 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 7, 2017
From: YUAN, JINGFENG; HIGGINS, JAMES M.; WHALEY, JEFF
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 043220/0350 →
Continuity (1)
Provisional Application 62524962 · Jun 26, 2017