摘要:
A differential pair sensing circuit (300) includes control gates (306, 316) for separately programming a reference transistor (350) and a chemically-sensitive transistor (351) to a desired threshold voltage Vt to eliminate the mismatch between the transistors in order to increase the sensitivity and/or accuracy of the sensing circuit without increasing the circuit size.
摘要:
Methods and apparatuses relating to large scale FET arrays for analyte detection and measurement are provided. ChemFET (e.g., ISFET) arrays may be fabricated using conventional CMOS processing techniques based on improved FET pixel and array designs that increase measurement sensitivity and accuracy, and at the same time facilitate significantly small pixel sizes and dense arrays. Improved array control techniques provide for rapid data acquisition from large and dense arrays. Such arrays may be employed to detect a presence and/or concentration changes of various analyte types in a wide variety of chemical and/or biological processes.
摘要:
Various embodiments provide memory devices and methods for forming the same. A substrate is provided, the substrate having one or more adjacent memory cells formed thereon. Each memory cell includes a gate structure, a control gate layer, and a first mask layer. A portion of the control gate layer is removed, to reduce a size of an exposed portion of the control gate layer in a direction parallel to a surface of the substrate. An electrical contact layer is formed on an exposed sidewall of the control gate layer and an exposed surface of the substrate. A barrier layer is formed on a sidewall of the memory cell. A conductive structure is formed on the substrate. The conductive structure has a significantly larger distance from control gate layer than from the gate structure, and the barrier layer forms an isolation layer between the conductive structure and the control gate layer.
摘要:
A nonvolatile memory device includes a plurality of twin cells arrayed on a substrate. Each of the plurality of twin cells includes a drain mesa protruding from a surface of a substrate. A first source and a second source are disposed in the substrate and spaced apart from the drain mesa. A first floating gate overlaps with a first sidewall surface of the drain mesa and extends onto the first source, and a second floating gate overlaps with a second sidewall surface of the drain mesa and extends onto the second source. Related methods are also provided.
摘要:
A back-end metallization structure for non-volatile memory (NVM) and other semiconductor devices including low-moisture-content oxide cap layers that suppress the creation and migration of mobile hydrogen atoms/ions during back-end processing. The metallization structure includes multiple metallization layers formed over front-end e.g., polysilicon (floating gate) structures and a pre-metal dielectric layer. Each metallization layer includes a patterned metal (e.g., aluminum) structure covered by an interlevel dielectric (ILD) layer (e.g., BPSG, USG or FSG). Each cap layer is formed using a high-density low-moisture content oxide such as silane oxide (i.e., SiO2 generated by way of a silane CVD process) that is deposited over the ILD layer in lower metallization layers to serve as an etch-stop for the subsequently-formed metal layer, and to isolate the ILD material from the plasma environment during aluminum over etch, which significantly reduces the production and migration of hydrogen that diminishes charge storage by the floating gates.
摘要:
A non-volatile memory cell includes a substrate, an erase gate disposed on the substrate and having a top plane, two floating gates disposed respectively at both sides of the erase gate, two control gates disposed respectively on two floating gates, and two select gates disposed respectively at outer sides of the two floating gates, where the two select gates have tilted top planes which are symmetric to each other.
摘要:
Semiconductor devices include one or more transistors having a floating gate and a control gate. In at least one embodiment, the floating gate comprises an intermediate portion extending between two end portions. The intermediate portion has an average cross-sectional area less than one or both of the end portions. In some embodiments, the intermediate portion may comprise a single nanowire. In additional embodiments, semiconductor devices have one or more transistors having a control gate and a floating gate in which a surface of the control gate opposes a lateral side surface of a floating gate that defines a recess in the floating gate. Electronic systems include such semiconductor devices. Methods of forming semiconductor devices include, for example, forming a floating gate having an intermediate portion extending between two end portions, and configuring the intermediate portion to have an average cross-sectional area less than one or both of the end portions.
摘要:
A method of making a monolithic three dimensional NAND string includes forming a stack of alternating first and second material layers over a substrate, etching the stack to form a front side opening, partially removing the second material layers through the front side opening to form front side recesses, forming a first blocking dielectric in the front side recesses, forming charge storage regions over the first blocking dielectric in the front side recesses, forming a tunnel dielectric layer and a semiconductor channel over the charge storage regions in the front side opening, etching the stack to form a back side opening, removing the second material layers through the back side opening to form back side recesses using the first blocking dielectric as an etch stop, forming a second blocking dielectric in the back side recesses, and forming control gates over the second blocking dielectric in the back side recesses.
摘要:
A semiconductor device includes a first conductor, a second conductor, a first insulator, a second insulator, a third insulator, a semiconductor, and an electron trap layer. The semiconductor includes a channel formation region. The electron trap layer overlaps with the channel formation region with the second insulator interposed therebetween. The first conductor overlaps with the channel formation region with the first insulator interposed therebetween. The second conductor overlaps with the electron trap layer with the third insulator interposed therebetween. The second conductor does not overlap with the channel formation region.
摘要:
A non-volatile memory device may include a semiconductor substrate and an isolation layer on the semiconductor substrate wherein the isolation layer defines an active region of the semiconductor substrate. A tunnel insulation layer may be provided on the active region of the semiconductor substrate, and a charge storage pattern may be provided on the tunnel insulation layer. An interface layer pattern may be provided on the charge storage pattern, and a blocking insulation pattern may be provided on the interface layer pattern. Moreover, the block insulation pattern may include a high-k dielectric material, and the interface layer pattern and the blocking insulation pattern may include different materials. A control gate electrode may be provided on the blocking insulating layer so that the blocking insulation pattern is between the interface layer pattern and the control gate electrode. Related methods are also discussed.