Patent ID: 11942422
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. The method of claim 1, wherein forming a horizontally alternating sequence of dielectric spacer structures and dielectric liner structures within horizontal boundaries of the trench comprises forming a stadium structure within the preliminary stack structure and within horizontal boundaries of the trench, the stadium structure comprising:
a forward staircase structure having steps comprising horizontal ends of the tiers, some portions of the dielectric liner structures in physical contact with some of the insulative structures of the preliminary stack structure at the steps of the forward staircase structure; and
a reverse staircase structure opposing the forward staircase structure and having additional steps comprising additional horizontal ends of the tiers, some other portions of the dielectric liner structures in physical contact with some other of the insulative structures of the preliminary stack structure at the additional steps of the reverse staircase structure.