摘要:
A negative coefficient of thermal expansion particle includes a first bilayer having a first bilayer inner layer and a first bilayer outer layer, and a second bilayer having a second bilayer inner layer and a second bilayer outer layer. The first and second bilayers are joined together along perimeters of the first and second bilayer outer layers and first and second bilayer inner layers, respectively. The first bilayer inner layer and the second bilayer inner layer are made of a first material and the first bilayer outer layer and the second bilayer outer layer are made of a second material. The first material has a greater coefficient of thermal expansion than that of the second material.
摘要:
A Negative Thermal Expansion system (NTEs) device for TCE compensation or CTE compensation in elastomer composites and conductive elastomer interconnects in microelectronic packaging. One aspect of the present invention provides a method for fabricating micromachine devices that have negative thermal expansion coefficients that can be made into a composite for manipulation of the TCE of the material. These devices and composites made with these devices are in the categories of materials called “smart materials” or “responsive materials.” Another aspect of the present invention provides microdevices comprised of dual opposed bilayers of material where the two bilayers are attached to one another at the peripheral edges only, and where the bilayers themselves are at a minimum stress conditions at a reference temperature defined by the temperature at which the bilayers are formed. These devices have the technologically useful property of volumetrically expanding upon lowering of the device temperature below the reference or processing temperature.
摘要:
A reformer includes a combined mount that serves to attach and support a foot bar assembly, a jump board, and a spring bar. The combined mount is easily and quickly attached to a side rail of a frame of the reformer. A carriage of the reformer includes a combined wheel axle and strap attachment point, which eliminates the need for a separate strap attachment bracket. The carriage also include side wheels which are mounted on the sides of the carriage, and which are biased outward so that they contact the side rails of the frame of the reformer.
摘要:
A contact magnetic transfer (CMT) master template is made by first adhering a plastic film to a first surface of a silicon wafer. A resist pattern is then formed on the polyimide film and the polyimide is reactive-ion-etched through the resist to form recesses. The resist is removed and a chemical-mechanical-polishing (CMP) stop layer is deposited over the non-recessed regions of the polyimide, and optionally into the bottoms of the recesses. A layer of magnetic material is then deposited over the polyimide film to fill the recesses. A CMP process is then performed to remove magnetic material above the recesses and above the non-recessed regions and continued until the CMP stop layer is reached. The resulting upper surface of the polyimide film is then a continuous planar film of magnetic islands and regions of CMP stop layer material that function as the nonmagnetic regions of the template.
摘要:
A reformer includes a combined mount that serves to attach and support a foot bar assembly, a jump board, and a spring bar. The combined mount is easily and quickly attached to a side rail of a frame of the reformer. A carriage of the reformer include a combined wheel axle and strap attachment point, which eliminates the need for a separate strap attachment bracket. The carriage also include side wheels which are mounted on the sides of the carriage, and which are biased outward so that they contact the side rails of the frame of the reformer.
摘要:
A reformer includes a combined mount that serves to attach and support a foot bar assembly, a jump board, and a spring bar. The combined mount is easily and quickly attached to a side rail of a frame of the reformer. A carriage of the reformer includes a combined wheel axle and strap attachment point, which eliminates the need for a separate strap attachment bracket. The carriage also include side wheels which are mounted on the sides of the carriage, and which are biased outward so that they contact the side rails of the frame of the reformer.
摘要:
A reformer includes a combined mount that serves to attach and support a foot bar assembly, a jump board, and a spring bar. The combined mount is easily and quickly attached to a side rail of a frame of the reformer. A carriage of the reformer include a combined wheel axle and strap attachment point, which eliminates the need for a separate strap attachment bracket. The carriage also include side wheels which are mounted on the sides of the carriage, and which are biased outward so that they contact the side rails of the frame of the reformer.
摘要:
A method for operating a Cartesian-type electron beam (e-beam) lithography (EBL) tool enables the efficient and precise writing of a closed curvilinear pattern, such as a circle, over a wide area of a workpiece. The curvilinear pattern overlies a plurality of contiguous fields of the EBL tool's x-y positioning stage, and the stage is moved along a path defined by the contiguous fields. Alignment marks associated with the first and next-to-last fields are formed on the specimen. The alignment marks are used to adjust the shape of the last field so that when the e-beam is scanned in the last field there is a substantially continuous connection of the pattern between the next-to-last field and the first field. The invention is particularly applicable to making a master disk with concentric circular tracks for nanoimprinting patterned magnetic recording disks.
摘要:
A contact magnetic transfer (CMT) master template has a flexible plastic film with a planarized top or upper surface containing magnetic islands separated from one another by nonmagnetic regions. The flexible plastic film is secured at its perimeter to a silicon annulus that provides rigid support at the perimeter of the film. The plastic film is preferably polyimide that has recesses filled with the magnetic material that form the pattern of magnetic islands. The upper surfaces of the islands and the upper surfaces of the nonmagnetic regions form a continuous planar surface. The nonmagnetic regions are formed of chemical-mechanical-polishing (CMP) stop layer material that remains after a CMP process has planarized the upper surface of the plastic film.