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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.:

US 12317764 B1

PDFFull Text
Date of Patent:
May. 27, 2025

Filed:

Nov. 06, 2020

Uniform voltage drop in arrays of memory devices

Applicant:

International Business Machines Corporation, Armonk, NY (US);

Inventors:

Injo Ok, Loudonville, NY (US);

Soon-Cheon Seo, Glenmont, NY (US);

Alexander Reznicek, Troy, NY (US);

Youngseok Kim, Upper Saddle River, NJ (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorney:

L. Jeffrey Kelly

Primary Examiner:

Yu Chen

Int. Cl.
CPC ...
H10N 70/20 (2023.01); H01L 23/522 (2006.01); H10B 63/00 (2023.01); H10B 63/10 (2023.01); H10D 1/47 (2025.01); H10N 70/00 (2023.01); G11C 13/00 (2006.01); H01L 21/768 (2006.01); H01L 23/528 (2006.01); H01L 23/532 (2006.01);
U.S. Cl.
CPC ...
H10N 70/8413 (2023.02); H01L 23/5228 (2013.01); H10B 63/80 (2023.02); H10D 1/474 (2025.01); H10N 70/011 (2023.02); H10N 70/231 (2023.02); H10N 70/826 (2023.02); H10N 70/8828 (2023.02); G11C 13/0004 (2013.01); G11C 2213/77 (2013.01); H01L 21/76807 (2013.01); H01L 21/76834 (2013.01); H01L 23/528 (2013.01); H01L 23/53261 (2013.01);
Abstract

Arrays of PCM devices and techniques for fabrication thereof having an integrated resistor formed during heater patterning for uniform voltage drop amongst the PCM devices are provided. In one aspect, a PCM device includes: at least one PCM cell including a phase change material disposed on a heater; and at least one resistor in series with the at least one PCM cell, wherein the at least one resistor includes a same combination of materials as the heater. A memory array and a method of forming a PCM device are also provided.

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