摘要:
Within both a method for fabricating a split gate field effect transistor and the split gate field effect transistor fabricated employing the method, there is employed a patterned silicon nitride barrier dielectric layer formed covering a first portion of a floating gate and a first portion of a semiconductor substrate adjacent the first portion of the floating gate. Within the first portion of the semiconductor substrate there is eventually formed a source/drain region, and more particularly a source region, when fabricating the split gate field effect transistor. The patterned silicon nitride barrier dielectric layer inhibits when fabricating the split gate field effect transistor ion implant damage of the floating gate and oxidative loss of a floating gate electrode edge.
摘要:
Within a method for fabricating a split gate field effect transistor (FET) within a semiconductor integrated circuit microelectronic fabrication, there is employed a sacrificial self aligned spacer layer which defines a control gate electrode channel within the split gate field effect transistor (FET). The sacrificial self aligned spacer layer is employed as part of an ion implantation mask employed for forming a source/drain region adjoining the control gate electrode channel within the split gate field effect transistor (FET). The sacrificial self aligned spacer layer is stripped from over the control gate electrode channel prior to forming over the control gate electrode channel a control gate electrode within the split gate field effect transistor.
摘要:
A method is disclosed for forming a split-gate flash memory cell where the floating gate of the cell is self-aligned to a shallow trench isolation (STI), which in turn makes it self-aligned to source and to word line. This will advantageously affect a shrinkage in the size of the memory cell. In a first embodiment, the close self-alignment is made possible through a new use of an anti-reflective coating (ARC) in the various process steps of the making of the cell. In the second embodiment, a low-viscosity material is used in such a manner so as to enable self-alignment of the floating gate to the STI in a simple way.
摘要:
A modified nitride spacer and making of the same are disclosed. The modified nitride spacer is formed adjacent a high-temperature oxide (HTO) layer which in turn is formed adjacent the sidewalls of a gate electrode. It is shown that the placement of an intervening oxide layer between the sidewalls of the gate electrode and the nitride spacer, in that order only, provides a significant improvement in charge retention in floating gate memory cells. Also, forming of the spacer from pure, undoped oxide only yields the same favorable results.
摘要:
A method for fabricating a single polysilicon, non-volatile memory device, has been developed. The method features the use of a metal structure, comprised to contact an underlying control gate region, located in the semiconductor structure, in addition to providing the upper electrode, for a capacitor structure. The capacitor structure, in addition to the metal structure used as the upper electrode, is also comprised of an underlying capacitor dielectric layer, and an underlying polysilicon floating gate structure, used as the lower electrode of the capacitor structure. The creation of the capacitor structure results in performance increases realized via the additional control gate coupling capacitance, obtained via the novel configuration described in this invention.
摘要:
A method for integrating salicide and high voltage device processes in the fabrication of high and low voltage devices on a single wafer is described. Isolation areas are formed on a semiconductor substrate surrounding and electrically isolating a low voltage device area from a high voltage device area. A gate oxide layer is grown in the device areas. A polysilicon layer is deposited overlying the gate oxide layer and isolation areas. A first photomask is formed over a portion of the high voltage device area wherein the first photomask also completely covers the low voltage device area. The polysilicon layer is etched away where it is not covered by the photomask to form a high voltage device. Ions are implanted to form lightly doped source and drain regions within the semiconductor substrate adjacent to the high voltage device wherein the first photomask protects the polysilicon layer in the low voltage device area from the ions. The first photomask is removed. A second photomask is formed over a portion of the low voltage device area where a gate electrode is to be formed wherein the second photomask also completely covers the high voltage device area. The polysilicon layer not covered by the second photomask is etched away to form the gate electrode. The second photomask is removed. The low voltage and high voltage area devices are silicided and the fabrication of the integrated circuit device is completed.
摘要:
A thin-type spike intensifying structure is formed by bending a predetermined plate with a punch finishing work. The thin-type spike includes an assembly part and a spike sheet, wherein the assembly part provides for fixing and assembling the spike at a bottom of a sports shoe, and the spike sheet is disposed at a side of the assembly part and manifests an arc-shape design through bending and protrusion. By the arc-shape structure design, a rigid structure of the spike is intensified, and the spike can be manufactured with a thin metal, such that the spike can be firm and tolerable, and a product can be lighter, in order to improve its practicability and advancement.
摘要:
A hobnail structure is composed of a connection rod and a cap installed on the connection rod, wherein the connection rod is a bolt, one end of which is provided with a ring of larger diameter with slant grooves having a same direction of deflection as that of threads of the aforementioned bolt located at rims of the ring. The cap is a cover, the bottom surface of which is provided with a slot hole, the diameter of which is smaller than that of the ring of the connection rod, and the slot hole is latched to the ring of the connection rod, so as to form a hobnail structure. Accordingly, the connection rod will not escape from the cap, resulting from an excessive exertion of a rotation force upon tightening, when the hobnail is screwed to a hole seat on a sole.
摘要:
A hobnail structure is composed of a connection rod and a cap installed on the connection rod, wherein the connection rod is a bolt, one end of which is provided with a ring of larger diameter with slant grooves having a same direction of deflection as that of threads of the aforementioned bolt located at rims of the ring. The cap is a cover, the bottom surface of which is provided with a slot hole, the diameter of which is smaller than that of the ring of the connection rod, and the slot hole is latched to the ring of the connection rod, so as to form a hobnail structure. Accordingly, the connection rod will not escape from the cap, resulting from an excessive exertion of a rotation force upon tightening, when the hobnail is screwed to a hole seat on a sole.