Abstract:
Apparatus and methods are disclosed, including a method that raises an electrical potential of a plurality of access lines to a raised electrical potential, where each access line is associated with a respective charge storage device of a string of charge storage devices. The electrical potential of a selected one of the access lines is lowered, and a data state of the charge storage device associated with the selected access line is sensed while the electrical potential of the selected access line is being lowered. Additional apparatus and methods are described.
Abstract:
Apparatuses and methods for measuring an electrical characteristic of a model signal line and providing measurement information based at least in part on the measurement of the electrical characteristic. An example apparatus includes a signal line model including a model signal line configured to model electrical characteristics of a signal line. The apparatus further includes a measurement circuit coupled to the signal line model and configured to measure the electrical characteristic of the model signal line responsive to an input signal provided to the model signal line. The measurement circuit is further configured to provide measurement information based at least in part on the measurement to set a signal applied to the signal line.
Abstract:
Various apparatuses, including three-dimensional (3D) memory devices and systems including the same, are described herein. In one embodiment, a 3D memory device can include at least two sources; at least two memory arrays respectively formed over and coupled to the at least two sources; and a source conductor electrically respectively coupled to the at least two sources using source contacts adjacent one or more edges of the source. Each of the at least two memory arrays can include memory cells, control gates, and data lines. There is no data line between an edge of a source and the source contacts adjacent the edge.
Abstract:
In an embodiment, a short-checking method includes charging a data line to an initial voltage while activating a memory cell coupled to the data line, allowing the data line to float while continuing to activate the memory cell, sensing a resulting voltage on the data line after a certain time, and determining whether a short exists in response to a level of the resulting voltage.
Abstract:
In an embodiment, a short-checking method includes charging a data line to an initial voltage while activating a memory cell coupled to the data line, allowing the data line to float while continuing to activate the memory cell, sensing a resulting voltage on the data line after a certain time, and determining whether a short exists in response to a level of the resulting voltage.
Abstract:
Apparatuses and methods for interconnections for 3D memory are provided. One example apparatus can include a stack of materials including a plurality of pairs of materials, each pair of materials including a conductive line formed over an insulation material. The stack of materials has a stair step structure formed at one edge extending in a first direction. Each stair step includes one of the pairs of materials. A first interconnection is coupled to the conductive line of a stair step, the first interconnection extending in a second direction substantially perpendicular to a first surface of the stair step.
Abstract:
Voltage generation devices and methods are useful in determining a data state of a selected memory cell in a memory device. Voltages can be generated in response to a first current and a second current. The first current is responsive to a memory device operation and a memory cell data state associated with the memory device operation, while the second current is responsive to a temperature associated with the memory device and to the memory cell data state associated with the memory device operation.
Abstract:
A memory device, system, and method for operation of a memory device. In one such memory device, the memory device comprises a plurality of strings of memory cells. A plurality of drain select devices are coupled to each string of memory cells. An upper drain select device shares common support circuitry (e.g., selecting/deselecting transistors) with one or more upper drain select devices of other strings of memory cells. The support circuitry (e.g., selecting/deselecting transistors) for lower drain select devices can also be shared between a plurality of strings of memory cells.
Abstract:
Apparatus and methods are disclosed, including an apparatus that includes a number of tiers of a first semiconductor material, each tier including at least one access line of at least one memory cell and at least one source, channel and/or drain of at least one peripheral transistor, such as one used in an access line decoder circuit or a data line multiplexing circuit. The apparatus can also include a number of pillars of a second semiconductor material extending through the tiers of the first semiconductor material, each pillar including either a source, channel and/or drain of at least one of the memory cells, or a gate of at least one of the peripheral transistors. Methods of forming such apparatus are also described, along with other embodiments.
Abstract:
Some embodiments include apparatuses and methods having a memory cell string including memory cells located in different levels of the apparatuses and a select transistor coupled to the memory cell string. In at least one of such apparatuses, the select transistor can include a body region including a monocrystalline semiconductor material. Other embodiments including additional apparatuses and methods are described.