Abstract: An electronic device includes a source contact adjacent to a source stack, the source stack including one or more conductive materials, tiers of alternating conductive material and dielectric materials adjacent to the source contact, pillars extending vertically through the tiers and the source contact and at least partially into the source contact, a fill material extending vertically through the tiers to the source contact, and a metal silicide material between the fill material and an upper surface of the source contact. Related devices, systems, and methods are also disclosed.

Abstract: A method of forming a semiconductor device comprising forming a patterned resist over a stack comprising at least one material and removing a portion of the stack exposed through the patterned resist to form a stack opening. A portion of the patterned resist is laterally removed to form a trimmed resist and an additional portion of the stack exposed through the trimmed resist is removed to form steps in sidewalls of the stack. A dielectric material is formed between the sidewalls of the stack to substantially completely fill the stack opening, and the dielectric material is planarized. Additional methods are disclosed, as well as semiconductor devices.

Abstract: An audio system is provided for reminding a person exiting a building to possess a key. Included is a speaker for emitting audible audio signals. Also provided is a detection mechanism for indicating that a door of a doorway has been opened. Control circuitry is connected between the speaker and the detection mechanism. The control circuitry is adapted to emit audio signals via the speaker reminding a person exiting a building to possess a key only upon the detection mechanism indicating that the door of the doorway has been opened.