摘要:
According to one embodiment, a semiconductor device includes a substrate, a first stacked body, a memory film, a first channel body, a second stacked body, a gate insulating film and a second channel body. A step part is formed between a side face of the select gate and the second insulating layer. A film thickness of a portion covering the step part of the second channel body is thicker than a film thickness of a portion provided between the second insulating layers of the second channel body.
摘要:
A plurality of a first conductive layers are provided at a certain interval L in a vertical direction, with a dielectric sandwiched therebetween. The certain interval L is set so that the first dielectric has an equivalent oxide thickness DEOT that satisfies the following relation (1). Dsio2
摘要:
A non-volatile semiconductor storage device has a plurality of memory strings with a plurality of electrically rewritable memory cells connected in series. Each of the memory strings includes: a columnar semiconductor layer extending in a direction perpendicular to a substrate; a plurality of conductive layers formed at a sidewall of the columnar semiconductor layer via memory layers; and interlayer insulation layers formed above of below the conductive layers. A sidewall of the conductive layers facing the columnar semiconductor layer is formed to be inclined such that the distance thereof from a central axis of the columnar semiconductor layer becomes larger at lower position thereof than at upper position thereof. While, a sidewall of the interlayer insulation layers facing the columnar semiconductor layer is formed to be inclined such that the distance thereof from a central axis of the columnar semiconductor layer becomes smaller at lower position thereof than at upper position thereof.
摘要:
A memory string comprises: a first semiconductor layer having a plurality of columnar portions extending in a perpendicular direction with respect to a substrate, and joining portions joining lower ends of the plurality of columnar portions; a charge storage layer surrounding a side surface of the first semiconductor layer; and a first conductive layer surrounding a side surface of the charge storage layer and functioning as a control electrode of memory cells. A select transistor comprises: a second semiconductor layer extending upwardly from an upper surface of the columnar portions; an insulating layer surrounding a side surface of the second semiconductor layer; a second conductive layer surrounding a side surface of the insulating layer and functioning as a control electrode of the select transistors; and a third semiconductor layer formed on an upper surface of the second semiconductor layer and including silicon germanium.
摘要:
A non-volatile semiconductor memory device includes a first columnar semiconductor layer and a plurality of first conductive layers formed such that a charge storage layer for storing charges is sandwiched between the first conductive layers and the first columnar semiconductor layer. Also, the non-volatile semiconductor memory device includes a second columnar semiconductor layer and a second conductive layer formed such that an insulating layer is sandwiched between the second conductive layer and the second columnar semiconductor layer, the second conductive layer being repeatedly provided in a line form by providing a certain interval in a first direction perpendicular to a laminating direction. A first sidewall conductive layer being in contact with the second conductive layer and extending in the first direction is formed on a sidewall along a longitudinal direction of the second conductive layer.
摘要:
A nonvolatile semiconductor memory device, includes: a stacked body including a plurality of insulating films alternately stacked with a plurality of electrode films, the electrode films being divided to form a plurality of control gate electrodes aligned in a first direction; a plurality of semiconductor pillars aligned in a stacking direction of the stacked body, the semiconductor pillars being arranged in a matrix configuration along the first direction and a second direction intersecting the first direction to pierce the control gate electrodes; and a connection member connecting a lower end portion of one of the semiconductor pillars to a lower end portion of one other of the semiconductor pillars, an upper end portion of the one of the semiconductor pillars being connected to a source line, an upper end portion of the one other of the semiconductor pillars being connected to a bit line. At least some of the control gate electrodes are pierced by two of the semiconductor pillars adjacent to each other in the second direction. Two of the semiconductor pillars being connected to each other by the connection member pierce mutually different control gate electrodes.
摘要:
A multilayer body is formed by alternately stacking electrode films serving as control gates and dielectric films in a direction orthogonal to an upper surface of a silicon substrate. Trenches extending in the word line direction are formed in the multilayer body and a memory film is formed on an inner surface of the trench. Subsequently, a silicon body is buried inside the trench, and a charge storage film and the silicon body are divided in the word line direction to form silicon pillars. This simplifies the configuration of memory cells in the bit line direction, and hence can shorten the arrangement pitch of the silicon pillars, decreasing the area per memory cell.
摘要:
A nonvolatile semiconductor memory device includes: a stacked body with a plurality of insulating films and electrode films alternately stacked therein, through which a through hole extending in the stacking direction is formed; a semiconductor pillar buried inside the through hole; and a charge storage layer located on both sides of each of the electrode films in the stacking direction and insulated from the electrode film and the semiconductor pillar.
摘要:
A nonvolatile semiconductor memory device includes a first stacked body on a silicon substrate, and a second stacked body is provided thereon. The first stacked body includes a plurality of insulating films alternately stacked with a plurality of electrode films, and a first portion of a through-hole extending in a stacking direction is formed. The second stacked body includes a plurality of insulating films alternately stacked with a plurality of electrode films, and a second portion of the through-hole is formed. A memory film is formed on an inner face of the through-hole, and a silicon pillar is buried in an interior of the through-hole. A central axis of the second portion of the through-hole is shifted from a central axis of the first portion, and a lower end of the second portion is positioned lower than an upper portion of the first portion.
摘要:
A nonvolatile semiconductor memory device, includes: a stacked structural unit including electrode films alternately stacked with inter-electrode insulating films; first and second semiconductor pillars piercing the stacked structural unit; a connection portion semiconductor layer electrically connect the first and second semiconductor pillars; a connection portion conductive layer provided to oppose the connection portion semiconductor layer; a memory layer and an inner insulating film provided between the first and semiconductor pillars and each of the electrode films, and between the connection portion conductive layer and the connection portion semiconductor layer; an outer insulating film provided between the memory layer and each of the electrode films; and a connection portion outer insulating film provided between the memory layer and the connection portion conductive layer. The connection portion outer insulating film has a film thickness thicker than a film thickness of the outer insulating film.