Patent ID: 11925023
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A three-dimensional semiconductor device, comprising:
a first stacked structure on a substrate, the first stacked structure including first horizontal layers and first insulating layers alternately stacked on the substrate, and each of the first horizontal layers includes a first pad at an end portion thereof; and
a second stacked structure on the first stacked structure, the second stacked structure including second horizontal layers and second insulating layers alternately stacked on the first stacked structure, and each of the second horizontal layers including a second pad at an end portion thereof,
wherein the first pads of the first horizontal layers form a first staircase of the first stacked structure in a first direction,
wherein the second pads of the second horizontal layers form a second staircase of the second stacked structure in a second direction different from the first direction, and
wherein the second staircase extends farther than a first sidewall of an uppermost one of the first horizontal layers.