Abstract:
A fabricating method of a DRAM structure includes providing a substrate comprising a memory array region and a peripheral region. A buried gate transistor is disposed within the memory array region, and a planar gate transistor is disposed within the peripheral region. Furthermore, an interlayer dielectric layer covers the memory array region, the buried gate transistor and the planar gate transistor. Then, a capping layer of the planar gate transistor and part of the interlayer dielectric layer are removed simultaneously so that a first contact hole, a second contact hole and a third contact hole are formed in the interlayer dielectric layer. A drain doping region of the buried gate transistor is exposed through the first contact hole, a doping region of the planar gate transistor is exposed through the second contact hole, and a gate electrode of the planar gate transistor is exposed through the third contact hole.
Abstract:
A memory array layout includes an active region array having a plurality of active regions, wherein the active regions are arranged alternatively along a second direction and parts of the side of the adjacent active regions are overlapped along a second direction; a plurality of first doped region, wherein each first doped region is disposed in a middle region; a plurality of second doped region, wherein each second doped region is disposed in a distal end region respectively; a plurality of recessed gate structures; a plurality of word lines electrically connected to each recessed gate structure respectively; a plurality of digit lines electrically connected to the first doped region respectively; and a plurality of capacitors electrically connected to each second doped region respectively.
Abstract:
A flash memory structure includes a semiconductor substrate, a gate dielectric layer on the semiconductor substrate, a floating gate on the gate dielectric layer, a capacitor dielectric layer conformally covering the floating gate, wherein the capacitor dielectric layer forms a top surface and four sidewall surfaces; and an isolated conductive cap layer covering the top surface and the four sidewall surfaces.
Abstract:
A NAND type flash memory for increasing data read/write reliability includes a semiconductor substrate unit, a base unit, and a plurality of data storage units. The semiconductor substrate unit includes a semiconductor substrate. The base unit includes a first dielectric layer formed on the semiconductor substrate. The data storage units are formed on the first dielectric layer. Each data storage unit includes two floating gates formed on the first dielectric layer, two inter-gate dielectric layers respectively formed on the two floating gates, two control gates respectively formed on the two inter-gate dielectric layers, a second dielectric layer formed on the first dielectric layer, between the two floating gates, between the two inter-gate dielectric layers, and between the two control gates, and a third dielectric layer formed on the first dielectric layer and surrounding and connecting with the two floating gates, the two inter-gate dielectric layers, and the two control gates.
Abstract:
A semiconductor device is disclosed which includes a silicide substrate, a nitride layer, two STIs, and a strain nitride. The silicide substrate has two doping areas. The nitride layer is deposited on the silicide substrate. The silicide substrate and the nitride layer have a recess running through. The two doping areas are at two sides of the recess. The end of the recess has an etching space bigger than the recess. The top of the silicide substrate has a fin-shaped structure. The two STIs are at the two opposite sides of the silicide substrate (recess). The strain nitride is spacer-formed in the recess and attached to the side wall of the silicide substrate, nitride layer, two STIs. The two doping areas cover the strain nitride. As a result, the efficiency of semiconductor is improved, and the drive current is increased.
Abstract:
In a manufacturing method of a non-volatile memory, a substrate is provided, and strip-shaped isolation structures are formed in the substrate. A first memory array including memory cell columns is formed on the substrate. Each memory cell column includes memory cells connected in series with one another, a source/drain region disposed in the substrate outside the memory cells, select transistors disposed between the source/drain region and the memory cells, control gate lines extending across the memory cell columns and in a second direction, and first select gate lines respectively connecting the select transistors in the second direction in series. First contacts are formed on the substrate at a side of the first memory array and arranged along the second direction. Each first contact connects the source/drain regions in every two adjacent active regions.
Abstract:
A method of forming a semiconductor structure is provided. The method includes providing a substrate and forming a mask layer on the substrate, Next, dielectric isolations are formed in the mask layer and the substrate, wherein the dielectric isolations extend above the substrate. Then, the mask layer is removed to expose a portion of the substrate, and a dielectric layer is formed on the exposed portion of the substrate. Subsequently, a first conductive layer is formed on the dielectric layer, and a portion of the dielectric isolation is removed, wherein a top surface of the remaining dielectric isolation is lower than a top surface of the first conductive layer. Moreover, a conformal layer is formed over the substrate, and a second conductive layer is formed on the conformal layer.
Abstract:
A method for manufacturing a memory includes first providing a substrate with a horizontally adjacent control gate region and floating gate region which includes a sacrificial layer and sacrificial sidewalls, removing the sacrificial layer and sacrificial sidewalls to expose the substrate, forming dielectric sidewalls adjacent to the control gate region, forming a floating gate dielectric layer on the exposed substrate and forming a floating gate layer adjacent to the dielectric sidewalls and on the floating gate dielectric layer.
Abstract:
The memory cell of the present invention has two independent storage regions embedded into two opposite sidewalls of the control gate respectively. In this way, the data storage can be more reliable. Other features of the present invention are that the thickness of the dielectric layers is different, and the two independent storage regions are formed on opposite bottom sides of the opening by the etching process and form a shape like a spacer. The advantage of the aforementioned method is that the fabricating process is simplified and the difficulty of self-alignment is reduced.
Abstract:
A manufacturing method of a non-volatile memory includes forming a first dielectric layer, a first conductive layer, and a first cap layer sequentially on a substrate to form first gate structures; conformally forming a second dielectric layer on the substrate; forming a first spacer having a larger wet etching rate than the second dielectric layer on each sidewall of each first gate structure; partially removing the first and second dielectric layers to expose the substrate. A third dielectric layer is formed on the substrate between the first gate structures; removing the first spacer; forming a second conductive layer on the third dielectric layer; removing the first cap layer and a portion of the first conductive layer to form second gate structures; and forming doped regions in the substrate at two sides of each second gate structure.