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387results about How to "Reduce the height of the structure" patented technology

Method of fabricating a Si3N4/polycide structure using a dielectric sacrificial layer as a mask

According to the disclosed method, there is provided a structure consisting of a silicon substrate coated with a bottom thin SiO2 layer, a doped polysilicon layer, a refractory metal layer and a top Si3N4 capping layer. Said refractory metal and doped polysilicon layers will form a polycide layer under subsequent thermal treatments. First, a sacrificial layer of a dielectric material such as oxynitride is deposited onto the structure. Oxynitride is impervious to UV radiation and has excellent conformal properties. Then, a layer of a photoresist material is deposited onto the structure and patterned to form a mask. Now the dielectric and top Si3N4 layers are anisotropically etched using the photoresist mask. The mask is stripped and the refractory metal and doped polysilicon layers are anisotropically dry etched down to the SiO2 layer using the patterned dielectric layer as an in-situ hard mask. A conformal layer of Si3N4 is deposited onto the structure, then anisotropically dry etched until the thin SiO2 layer is exposed to form the Si3N4 spacers. Diffusion regions are formed in the substrate by ion implantation. A layer of BPSG is deposited onto the structure and planarized. Contact holes are formed to expose said diffusion regions and filled with a metal to create borderless metal contacts therewith.
Owner:IBM CORP

Lower edge open truss style corrugated steel web combination beam

A truss-type corrugated steel web composite beam with an open bottom chord belongs to a bridge support member. The bottom chord opened and truss-type corrugated steel web composite beam comprises an upper wing edge concrete slab, a corrugated steel web and a bottom chord opened truss-type rectanglar steel tube concrete member. Compared with steel truss-type web composite corss section, the invention adopts the corrugated steel web with rather high shear strength to replace a steel web member, so as to guarantee quite high shear bearing capacity. The opened truss-type bottom chord is composed of two parallel-arranged rectanglar steel tubes arranged in parallel and internally cast concrete, as well as horizontal braces and batter braces between the rectanglar steel tubes. Moreover, the bottom chord adopts the steel tube concrete member to overcome the problem of rather high work volume that, in traditional composite cross section of corrugated steel web box beams and steel truss-type webs, such execution measures as scaffolding, formwork-support, concrete casting and etc. should be taken for lower wing edge concrete slabs. Meanwhie, the invention can effectively improve structure crack resistance, avoid crackage exposure and etc, and considerably increase structure durability. The bottom chord is a brace-connected open-type structure with advantages of simple structure and fast, smooth and convenient execution.
Owner:TSINGHUA UNIV

Urban rail transit continuous basin beam

The invention relates to an urban railway traffic continuous basin type beam. A beam body of the continuous basin type beam is a passage which has the basin-shaped cross section and is formed by connecting a support bottom plate, upper web plates and wing edge plates, the upper web plates are arranged at both sides of the support bottom plate, the wing edge plates are arranged at the tops of the upper web plates, at least two pairs of rail carrying tables are arranged on the support bottom plate, a power supply device, power supply cable support bodies and communication signal cable grooves are fixedly connected in the length direction of the beam body, the span of the beam body is 40m to 80m, the support bottom plate of the beam body at the side fulcrum region section and the middle spanflat and straight section is in a single layer, the rest support bottom plate of the beam body is in a closed opening box shape, in addition, the lower surface of the single-layer support bottom plate of the side fulcrum region section and the middle span flat and straight section is in smooth transition connection with the bottom surface of the box shape. The beam is arranged at the crossed transition line region section or a place required to span a large node, the urban railway traffic continuous basin type beam belongs to a bridge structural form integrating the thin-wall opening U-shapedbeam and the closed opening box-shaped beam into a whole, the problems that the ordinary railway traffic U-shaped beam cannot span large node and cannot be applied to the crossed wire transition region section are solved, and the application range of the U-shaped beam is enlarged.
Owner:BEIJING URBAN CONSTR DESIGN & DEV GRP CO

Lower chord opening beam type corrugated steel web combination beam

The invention relates to a bottom chord open truss type corrugated steel web composite beam, belonging to a bridge support member. The bottom chord open truss type corrugated steel web composite beam is composed of a top-wing concrete slab, a corrugated steel web and a bottom chord open truss type rectangular steel pipe concrete. Compared with the steel truss type web composite cross section, the bottom chord open truss type corrugated steel web composite beam adopts the corrugated steel web with high shear strength to replace the steel web bar, and has high shear bearing force. The open truss type bottom chord is composed of two parallel rectangular steel pipes and concretes casted in the steel pipes, horizontal supports between rectangular steel pipes, and inclined supports. the bottom chord adopts the steel pipe concrete member to overcome the problem that the bottom flange concrete of the traditional corrugated steel web box beam and steel truss type web composite cross section needs to set up scaffold, support framework and concrete casting so as to have large work load, moreover the bottom chord open truss type corrugated steel web composite beam can improve crack resistance of structure effectively and avoid crack from being exposed, so that structural endurance can be obviously improved. The bottom chord is an open type structure with support connection, and has the advantages of simple structure, convenient and rapid construction.
Owner:TSINGHUA UNIV

Right hexagonal steel-concrete combined hollow double lattice floor and manufacturing method thereof

The invention discloses a right hexagonal steel-concrete combined hollow double lattice floor and a manufacturing method thereof. In the floor, a frame formed by a hexagonal column grid forms the six sides of a floor right hexagon, the length L of the diagonal of the right hexagon is more than or equal to 30 meters and less than or equal to 48 meters, steel-concrete combined hollow beams are connected in the frame of the hexagonal column grid and are parallel to the sides of the hexagon respectively and crossed two by two to form steel-concrete combined hollow beam large right triangular grids with internal three-directional cross, and the structural height of the steel-concrete combined hollow beams is one twentieth or twenty-fourth of the length L of the diagonal; and the inside of each large right triangular grid is provided with three-directionally crossed concentrated ribbed beams which form small right triangular grids, and floor plates are covered on the large and small right triangular grids. The right hexagonal steel-concrete combined hollow double lattice floor has the advantages of good structure integrity, small structural height, small space occupation, concrete, small steel consumption and the like and is particularly suitable for constructing large-span polygonal flat surfaces and multilayer and multifunctional halls.
Owner:HUNAN UNIV +1
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