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:
Dec. 23, 2025
Filed:
Jun. 16, 2021
Micron Technology, Inc., Boise, ID (US);
Shuangqiang Luo, Boise, ID (US);
Indra V. Chary, Boise, ID (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
A microelectronic device comprises a stack structure comprising a vertically alternating sequence of conductive structures and insulative structures arranged in tiers, a stair step structure within the stack structure and having steps comprising lateral edges of the tiers, pillar structures extending through the stack structure and the stair step structure and in contact with a source tier vertically underlying the stack structure, and conductive contact structures in contact with the steps of the staircase structure, the conductive contact structures individually comprising a first portion and a second portion vertically overlying the first portion, the second portion vertically above the pillar structures and having a greater lateral dimension than the first portion. Related microelectronic devices, memory devices, and electronic systems are also described.