Patent ID: 11901292
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A microelectronic device, comprising:
a first dielectric material overlying vertically extending strings of memory cells;
a second dielectric material overlying and having a different material composition than the first dielectric material; and
conductive contact structures vertically extending through the first dielectric material and the second dielectric material, the conductive contact structures coupled to the vertically extending strings of memory cells and individually comprising:
a first portion confined within second dielectric material and having a substantially uniform horizontal cross-sectional area across a vertical height thereof; and
a second portion underlying and unitary with the first portion, the second portion vertically extending through the second dielectric material and the first dielectric material and having a non-uniform horizontal cross-sectional area across a vertical height thereof.