Semiconductor device structures including stair step structures, and related semiconductor devices
First Claim
Patent Images
1. A semiconductor device structure, comprising:
- a stair step structure comprising steps at least partially defined by laterally peripheral portions of partially conductive tiers overlying a substrate, the steps comprising;
a lower step;
an upper step; and
a middle step longitudinally between the lower step and the upper step, the middle step having a greater width than a width of the lower step and a width of the upper step; and
non-uniformly spaced contact structures over and in contact with the steps.
4 Assignments
0 Petitions
Accused Products
Abstract
A method of forming a semiconductor device assembly comprises forming tiers comprising conductive structures and insulating structures in a stacked arrangement over a substrate. Portions of the tiers are selectively removed to form a stair step structure comprising a selected number of steps exhibiting different widths corresponding to variances in projected error associated with forming the steps. Contact structures are formed on the steps of the stair step structure. Semiconductor device structures and semiconductor devices are also described.
-
Citations
15 Claims
-
1. A semiconductor device structure, comprising:
-
a stair step structure comprising steps at least partially defined by laterally peripheral portions of partially conductive tiers overlying a substrate, the steps comprising; a lower step; an upper step; and a middle step longitudinally between the lower step and the upper step, the middle step having a greater width than a width of the lower step and a width of the upper step; and non-uniformly spaced contact structures over and in contact with the steps. - View Dependent Claims (2)
-
-
3. A semiconductor device, comprising:
-
alternating conductive structures and insulating structures arranged in stacked tiers overlying a substrate, each of the stacked tiers comprising one of the conductive structures and one of the insulating structures; a stair step structure comprising steps comprising lateral end portions of the stacked tiers, the steps comprising; a first step; a second step longitudinally above the first step and having a larger width than the first step; and a third step longitudinally above the second step and having a smaller width than the second step; and contact structures in physical contact with the steps. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A semiconductor device, comprising:
-
a conductive stack structure comprising tiers each comprising a conductive structure and an insulating structure longitudinally adjacent the conductive structure; a stair step structure having steps comprising lateral ends of the tiers of the conductive stack structure, at least four of the steps having different widths than one another, and the steps comprising; a step; another step; and at least one additional step longitudinally between the step and the another step, the at least one additional step having a greater width than each of the step and the another step; and conductive contact structures in physical contact with the steps of the stair step structure. - View Dependent Claims (13, 14, 15)
-
Specification