摘要:
Each of memory strings is provided with a first semiconductor layer having a pair of columnar portions extending in a perpendicular direction with respect to a substrate; a charge storage layer formed to surround a side surface of the columnar portions; and a first conductive layer formed to surround the charge storage layer. Each of the select transistors is provided with a second semiconductor layer extending upwardly from an upper surface of the columnar portions; a gate insulating layer formed to surround a side surface of the second semiconductor layer; and a second conductive layer formed to surround the gate insulating layer. An effective impurity concentration of the second semiconductor layer is less than or equal to an effective impurity concentration of the first semiconductor layer.
摘要:
A non-volatile semiconductor storage device includes: a memory string including a plurality of memory cells connected in series; a first selection transistor having one end connected to one end of the memory string; a first wiring having one end connected to the other end of the first selection transistor; a second wiring connected to a gate of the first selection transistor. A control circuit is configured to boost voltages of the second wiring and the first wiring in the erase operation, while keeping the voltage of the first wiring greater than the voltage of the second wiring by a certain potential difference. The certain potential difference is a potential difference that causes a GIDL current.
摘要:
A phase change memory device including plural memory cells is disclosed. Each of the memory cells includes memory transistors and phase change film portions formed above or below the memory transistors. The phase change film portions correspond to the respective memory transistors respectively. Vias are provided in order to connect each of the memory transistor in parallel to each of the phase change film portions in each of the memory cells. The vias connect the memory cells in series to one another.
摘要:
A nonvolatile semiconductor memory device includes: a semiconductor region; device isolation regions placed in the semiconductor region and extending in a column direction; a semiconductor layer placed on the semiconductor region and between the device isolation regions, and having a convex shape in cross section along a row direction; source/drain regions placed in the semiconductor layer and spaced from each other; a gate insulating film placed on the semiconductor layer between the source/drain regions; a floating gate electrode layer placed on the gate insulating film; an intergate insulating film placed on the floating gate electrode layer and upper surfaces of the device isolation regions; and a control gate electrode layer placed on the intergate insulating film and extending in the row direction.
摘要:
According to one embodiment, a method for manufacturing a nonvolatile semiconductor storage device includes; forming a first and a second stacked bodies; forming a through hole penetrating through the first stacked body, a second portion communicating with the first portion and penetrating through a select gate, and a third portion communicating with the second portion and penetrating through a second insulating layer; forming a memory film, a gate insulating film, and a channel body; forming a third insulating layer inside the channel body; forming a first embedded portion above a boundary portion inside the third portion; exposing the channel body by removing part of the first embedded portion and part of the third insulating layer in the third portion; and embedding a second embedded portion including silicon having higher impurity concentration than the first embedded portion above the first embedded portion inside the third portion.
摘要:
According to an aspect of the present invention, there is provided a semiconductor device including a first conductive type semiconductor substrate, a gate electrode formed over the semiconductor substrate via a gate insulator, a first conductive impurity region buried in the semiconductor substrate, the first conductive impurity region being both sides of an extend plane, the extend plane being extended from side-walls of the gate electrode into the semiconductor substrate and a second conductive type source/drain region partially overlapping with the first conductive impurity region and extending from an end of the gate electrode at the semiconductor substrate to an outer region in the semiconductor substrate, wherein a first conductive impurity concentration at a prescribed depth in the overlapping portion between the first conductive impurity region and the source/drain region is lower than the first conductive impurity concentration in the first conductive impurity region except the overlapping portion corresponding to the prescribed depth.
摘要:
A semiconductor device having a first semiconductor region and second semiconductor region including impurities formed on an insulating layer formed on a semiconductor substrate, an insulator formed between the first semiconductor region and the second semiconductor region, a first impurity diffusion control film formed on the first semiconductor region and a second impurity diffusion control film formed on the second semiconductor region, a channel layer formed on the first impurity diffusion control film and second impurity diffusion film to cross at right angles with a direction where the first semiconductor region and the second semiconductor region are extended, a gate insulating film formed on the channel layer and a gate electrode formed on the gate insulating layer.
摘要:
A semiconductor device having a first semiconductor region and second semiconductor region including impurities formed on an insulating layer formed on a semiconductor substrate, an insulator formed between the first semiconductor region and the second semiconductor region, a first impurity diffusion control film formed on the first semiconductor region and a second impurity diffusion control film formed on the second semiconductor region, a channel layer formed on the first impurity diffusion control film and second impurity diffusion film to cross at right angles with a direction where the first semiconductor region and the second semiconductor region are extended, a gate insulating film formed on the channel layer and a gate electrode formed on the gate insulating layer.
摘要:
The semiconductor memory device of the present invention includes a plurality of memory strings having a plurality of electrically reprogrammable memory cells connected in series, the memory strings having a column shaped semiconductor, a first insulation film formed around the column shaped semiconductor, a charge accumulation layer formed around the first insulation film, a second insulation film formed around the charge accumulation film and a plurality of electrodes formed around the second insulation film, a bit line connected to one end of the memory strings via a plurality of selection transistors, and a conducting layer extending in two dimensions and in which the plurality of electrodes of the memory strings and the plurality of electrodes of different memory strings are shared respectively, wherein each end part of the conducting layer is formed in step shapes in a direction parallel with the bit line.
摘要:
In one embodiment, a shift register memory includes first and second control electrodes extending in a first direction parallel to a surface of a substrate, and facing each other in a second direction perpendicular to the first direction. The memory further includes a plurality of first floating electrodes provided in a line on a first control electrode side between the first and second control electrodes. The memory further includes a plurality of second floating electrodes provided in a line on a second control electrode side between the first and second control electrodes. Each of the first and second floating electrodes has a planar shape which is mirror-asymmetric with respect to a plane perpendicular to the first direction.