Patents
US 12763155 B2: Erase saturation mitigation in non-volatile memory
- Granted
- 2026-10-13
- Filed
- 2023-07-27 application 18360075
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Technology is disclosed herein for a storage system that mitigates erase saturation when erasing memory cells. If erase does not pass after a number of erase loops, the storage system applies a program pulse to memory cells on faster to erase NAND strings. However, memory cells on slower to erase NAND strings are inhibited from programming. The program pulse increases the Vt of memory cells on the faster to erase NAND strings. Then, another erase loop is performed. The process may continue with additional loops, with each loop programming the memory cells on the faster to erase NAND strings followed by an erase pulse to all NAND strings and erase verify. Over-erase of the memory cells on the faster to erase NAND strings is therefore prevented. Moreover, slower to erase NAND strings that may otherwise be a bottleneck do not prevent successful completion of the erase.
Source: PTBLXML, file of 2026-10-13 (ipgb20261013.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Sandisk Technologies, Inc. 4,933 patents | US company or organization | Milpitas, CA | SANDISK TECHNOLOGIES LLC State business registration FUZZY medium confidence: same name (legal endings aside) and state | PTBLXML, file of 2026-10-13 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Yi Song | San Jose, CA | 25 | PTBLXML, file of 2026-10-13 | |
| Jiahui Yuan | Fremont, CA | 142 | PTBLXML, file of 2026-10-13 | |
| Jiacen Guo | Sunnyvale, CA | 43 | PTBLXML, file of 2026-10-13 | |
| Xiang Yang | Santa Clara, CA | 265 | PTBLXML, file of 2026-10-13 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G11C | Static stores | G11C16/3445 | PTBLXML, file of 2026-10-13 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2025-04-25 | Release of security interest Partial release of security interests | JPMORGAN CHASE BANK, N.A., AS AGENT signed 2025-04-24 | SANDISK TECHNOLOGIES, INC. MILPITAS, CA | 71382/1 | PASDL, file of 2026-10-15 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.