摘要:
A flash memory cell is fabricated by forming a lightly-doped region with only an implantation procedure to avoid lateral diffusion resulting from an increased overlap between the source region and gate as well as a short channel effect, while surrounding the source region with the lightly-doped region to thereby increase the breakdown voltage between the source region and the substrate.
摘要:
In a method for fabricating a ULSI MOSFET, an additional polysilicon layer is used to form polysilicon/metal compound metal contacts on source and drain regions and a gate so as to avoid leakage current and short channel effect problems.
摘要:
A high-voltage device structure includes a high-voltage device disposed on a semiconductor substrate. The semiconductor includes an active region and an isolation region, and the high-voltage device is disposed in the active region. The high-voltage device structure includes a source diffusion region of a first conductive type, a drain region of the first conductive type, and a gate longer than the source diffusion region and the drain diffusion region so as to form spare regions on both sides of the gate. The isolation region is outside the active region and surrounds the active region. In the isolation region, an isolation ion implantation region of a second conductive type and an extended ion implantation region are disposed to prevent parasitic current from being generating between the source diffusion region and the drain diffusion region.
摘要:
A high-voltage device structure includes a high-voltage device disposed on a semiconductor substrate. The semiconductor includes an active region and an isolation region, and the high-voltage device is disposed in the active region. The high-voltage device structure includes a source diffusion region of a first conductive type, a drain region of the first conductive type, and a gate longer than the source diffusion region and the drain diffusion region so as to form spare regions on both sides of the gate. The isolation region is outside the active region and surrounds the active region. In the isolation region, an isolation ion implantation region of a second conductive type and an extended ion implantation region are disposed to prevent parasitic current from being generating between the source diffusion region and the drain diffusion region.
摘要:
A method of fabricating an EPROM memory increases a coupling ratio and reduces lateral diffusion by forming a gate oxide layer and a coupling insulator individually. A substrate is provided with a field oxide layer to isolate a predetermined active area. A gate oxide layer is formed on the substrate. On the field oxide layer and the gate oxide layer, a polysilicon layer is deposited and defined, whereby a portion of this polysilicon layer and gate oxide layer form a gate electrode. Using the gate electrode as a mask, the substrate is implanted with impurities to provide source and drain electrodes. A dielectric layer is formed on polysilicon layer. A contact window (via) is formed in a predetermined area of dielectric layer. An insulator is deposited and defined by etching, on dielectric layer and the contact window. On the insulator and dielectric layer, a metal contact layer is deposited and defined to cover the insulator.
摘要:
In a method for fabricating a ULSI MOSFET with SOI structure, an additional polysilicon layer is used to form polysilicon/metal compound metal contacts on source and drain regions and a gate so as to avoid leakage current and short channel effect problems.
摘要:
A method for forming a shallow trench isolation structure in a substrate includes the steps of forming a doped region around the future top corner regions of a trench. The concentration of dopants inside the doped region increases towards the substrate surface. Thereafter, a trench is formed in the substrate, and then a thermal oxidation operation is carried out. Utilizing the higher oxidizing rate for doped substrate relative to an undoped region, the upper corners of the trench become rounded corners. Subsequently, a liner oxide layer is formed over the substrate surface inside the trench using conventional methods. Finally, insulating material is deposited into the trench to form a trench isolation structure.
摘要:
A foldable cushion bag includes a main body and a handling unit. The main body includes a bottom wall and a sleeve wall jointed to the bottom wall. The bottom wall and the sleeve wall form a first heat sealed joint therebetween and cooperatively define a space for receiving a bottle. Each of the bottom and sleeve walls includes a multilayered structure having an outermost protecting layer, a first adhesive layer, a heat sealing layer, a second adhesive layer and an innermost cushion layer in that order. The handling unit is connected to the sleeve wall and opposite to the bottom wall. The handling unit is formed with a gripping hole.