Abstract:
A memory device, such as a three-dimensional AND or NOR flash memory includes a memory cell block, multiple first bit line switches, multiple second bit line switches, a first switch, and a second switch. The memory cell block is divided into a first sub memory cell block and a second sub memory cell block. The first bit line switches are respectively coupled to multiple first local bit lines and commonly coupled to a first sub global bit line. The second bit line switches are respectively coupled to multiple second local bit lines and commonly coupled to a second sub global bit line. The first switch is coupled between the first sub global bit line and a global bit line and controlled by a first control signal. The second switch is coupled between the second sub global bit line and the global bit line and controlled by a second control signal.
Abstract:
A 3D AND flash memory device includes a gate stack structure, a channel pillar, a source pillar, a charge storage structure, a first transistor and a second transistor. The gate stack structure is located on a dielectric substrate, wherein the gate stack structure includes a plurality of gate layers and a plurality of insulating layers alternately stacked. The channel pillar extends through the gate stack structure. The source pillar and the drain pillar are disposed in the channel pillar and electrically connected to the channel pillar. The charge storage structure is located between the plurality of gate layers and the channel pillar. The first transistor is located above the gate stack structure and electrically connected to the drain pillar. The second transistor is located above the gate stack structure and electrically connected to the source pillar.
Abstract:
Disclosed herein is a method of forming a semiconductor structure. The method includes the steps of: forming a first dielectric layer having a first through hole on a precursor substrate, in which the first through hole passes through the first dielectric layer; filling a sacrificial material in the first through hole; forming a second dielectric layer having a second through hole over the first dielectric layer, in which the second through hole exposes the sacrificial material in the first through hole, and the second through hole has a bottom width less than a top width of the first through hole; removing the sacrificial material after forming the second dielectric layer having the second through hole; forming a barrier layer lining sidewalls of the first and second through holes; and forming a conductive material in the first and second through holes.
Abstract:
A semiconductor structure is provided. The semiconductor structure includes a conductive strip, a conductive layer, a first dielectric layer, and a second dielectric layer. The first dielectric layer is between the conductive strip and the conductive layer arranged in a crisscross manner. The second dielectric layer is different from the first dielectric layer. The second dielectric layer and the first dielectric layer are adjoined with the conductive strip in different positions on the same sidewall of the conductive strip.
Abstract:
A 3D memory device includes a multi-layer stacks structure having a plurality of conductive strips and a first, a second, a third and a fourth ridge stack; a first SSL switch, a first GSL switch, a second SSL switch and a second GSL switch respectively disposed on the first, the second the third and the fourth ridge stack; a first U-shaped memory cells string connecting the first SSL switch with the first GSL switch; a second U-shaped memory cells string connecting the second SSL switch with the second GSL switch; a first word lines contact in contact with the conductive strips disposed in the first ridge stack; a second word lines contact in contact with the conductive strips disposed in the second ridge stack; and a third word lines contact in contact with the conductive strips disposed in the third ridge stack and the fourth ridge stack.
Abstract:
The area consumed by switching transistors for a 3D NAND memory array can be reduced with 3D voltage switching transistors with reduced aggregate area in comparison with 2D voltage switching transistors such as transistors in the substrate. The integrated circuit comprises a 3D NAND array of memory transistors; a plurality of bit lines, with different ones of the plurality of bit lines electrically coupled to different parts of the 3D NAND array; and a plurality of transistor pairs with a stack of semiconductor layers. Different layers in the stack of semiconductor layers include different transistor pairs of the plurality of transistor pairs. Each of the plurality of transistor pairs includes first and second transistors with first, second, and third source/drain terminals. The first transistor includes the first and the third source/drain terminals, and the second transistor includes the second and the third source/drain terminals. The first source/drain terminal is electrically coupled to an erase voltage line. The second source/drain terminal is electrically coupled to a corresponding one of a plurality of program/read voltage lines. The third source/drain terminal is electrically coupled to a corresponding one of the plurality of bit lines.
Abstract:
A memory includes a three-dimensional array including a plurality of levels is described. Each level includes a bit line pad, a source line pad, and a plurality of strips of semiconductor material extending between the bit line pad and the source line pad. The source line pad includes at least one n-type region and at least one p-type region. The memory includes word lines coupled to the plurality of strips in the plurality of levels. The memory includes data storage elements between the word lines and the strips of semiconductor material, whereby memory cells are disposed at cross-points of the strips and the word lines. The memory also includes circuitry coupled to the n-type region and the p-type region of the source line pad, configured to selectively enable current flow in the strips extending from the source line pad and one of the n-type region and the p-type region.
Abstract:
A memory structure and a method for manufacturing the same are provided. The memory structure comprises a substrate, stacks, memory layers, a conductive material and conductive lines. The stacks are positioned on the substrate. The stacks are separated from each other by trenches. Each of the stacks comprises alternately stacked conductive stripes and insulating stripes. The memory layers conformally cover the stacks respectively. The conductive material is positioned in the trenches and on the stacks. The conductive material in the trenches forms one or more holes in each of the trenches. The conductive lines are positioned on the conductive material. Each of the conductive lines comprises a first portion and a second portion connected to each other, the first portion extends along a direction perpendicular to an extending direction of the stacks, and the second portion extends along the extending direction of the stacks.
Abstract:
An integrated circuit and methods for manufacturing and operating the same are provided. The integrated circuit comprises a fork architecture and a first conductive structure. The fork architecture comprises a handle portion and prong portions extending from the handle portion. The fork architecture comprises a stacked structure and a dielectric layer. The dielectric layer is between the first conductive structure and the handle portion of the stacked structure.
Abstract:
A 3D AND flash memory device includes a gate stack structure, a channel pillar, a source pillar, a charge storage structure, a first transistor and a second transistor. The gate stack structure is located on a dielectric substrate, wherein the gate stack structure includes a plurality of gate layers and a plurality of insulating layers alternately stacked. The channel pillar extends through the gate stack structure. The source pillar and the drain pillar are disposed in the channel pillar and electrically connected to the channel pillar. The charge storage structure is located between the plurality of gate layers and the channel pillar. The first transistor is located above the gate stack structure and electrically connected to the drain pillar. The second transistor is located above the gate stack structure and electrically connected to the source pillar.