Abstract:
A trench-type storage device includes a trench in a substrate (100), with bundles of carbon nanotubes (202) lining the trench and a trench conductor (300) filling the trench. A trench dielectric (200) may be formed between the carbon nanotubes and the sidewall of the trench. The bundles of carbon nanotubes form an open cylinder structure lining the trench. The device is formed by providing a carbon nanotube catalyst structure on the substrate and patterning the trench in the substrate; the carbon nanotubes are then grown down into the trench to line the trench with the carbon nanotube bundles, after which the trench is filled with the trench conductor.
Abstract:
Micro-valves (257) and micro-pumps (400) and methods of fabricating micro- valves (257) and micro-pumps (400). The micro-valves (257) and micro-pumps (400) include electrically conductive diaphragms (155) fabricated from electrically conductive nano-fibers. Fluid flow through the micro-valves (257) and pumping action of the micro-pumps (400) is accomplished by applying electrostatic forces to the electrically conductive diaphragms (155).
Abstract:
Conductive sidewall spacer stractures are formed using a method tiiat patterns structures (mandrels) and activates the sidewalls of the structures. Metal ions are attached to the sidewalls of the structures and these metal ions are reduced to form seed material. The structures are then trimmed and the seed material is plated to form wiring on the sidewalls of the structures.
Abstract:
A method of forming a wiring structure for an integrated circuit includes the steps of forming a plurality of features (16) in a layer of dielectric material (13), and forming spacers (20) on sidewalls (16s) of the features. Conductors (25) are then formed in the features, being separated from the sidewalls by the spacers. The spacers are then removed, forming air gaps (40) at the sidewalls so that the conductors are separated from the sidewalls by the air gaps. Dielectric layers (42, 12) above and below the conductors may be low-k dielectrics having a dielectric constant less than that of the dielectric between the conductors. A cross-section of each of the conductors (25) has a bottom in contact with a low-k dielectric layer (12), a top in contact with another low-k dielectric (42), and sides in contact only with the air gaps (40). The air gaps serve to reduce the intralevel capacitance.
Abstract:
A vertical transistor particularly suitable for high density integration includes potentially independent gate structures (3230) o opposite sides of a semiconductor pillar (2910) formed by etching in a trench. The gate structure is surrounded by insulting material (2620) which is selectively etchable to isolation material surrounding the transistor. A contact (3820) is made to the lower end of the pillar by selectively etching the isolation material selective to the insulating material. The upper end of the pillar is covered by a cap (2730) and sidewalls of selectively etchable materials so that gate and source connection openings (3720, 3620) can also be made by selective etching with good registration tolerance.
Abstract:
THE PRESENT INVENTION PROVIDES A METHOD FOR FORMING SELF-ALIGNED SPACERS (502) ON THE HORIZONTAL SURFACES WHILE REMOVING SPACER MATERIAL FROM THE VERTICAL SURFACES. THE PREFERRED METHOD USES A RESIST(302) THAT CAN BE MADE INSOLUBLE TO DEVELOPER BY THE USE OF AN IMPLANT. BY CONFORMALLY DEPOSITING THE RESIST OVER A SUBSTRATE (202) HAVING BOTH VERTICAL AND HORIZONTAL SURFACES, IMPLANTING THE RESIST, AND DEVELOPING THE RESIST, THE RESIST IS REMOVED FROM THE VERTICAL SURFACES WHILE REMAINING ON THE HORIZONTAL SURFACES. THUS, A SELF-ALIGNED SPACER IS FORMED ON THE HORIZONTAL SURFACES WHILE THE SPACER MATERIAL IS REMOVED FROM THE VERTICAL SURFACES. THIS HORIZONTAL-SURFACE SPACER CAN THEN BE USED IN FURTHER FABRICATION. THE PREFERRED METHOD CAN BEUSED IN MANY DIFFERENT PROCESSES WHERE THERE IS EXISTS A NEED TO DIFFERENTIALLY PROCESS THE VERTICAL AND HORIZONTAL SURFACES OF A SUBSTRATE.FIG. 1
Abstract:
Disclosed is a process for forming a film comprising a polysilane composition on a substrate. The film is formed by vapor deposition directly on a substrate, thus avoiding the cumbersome steps ordinarily encountered in preparing and applying polysilanes by conventional spin application techniques. The film is used in a lithographic process for forming an image on a substrate.
Abstract:
Disclosed is a process for forming a film comprising a polysilane composition on a substrate. The film is formed by vapor deposition directly on a substrate, thus avoiding the cumbersome steps ordinarily encountered in preparing and applying polysilanes by conventional spin application techniques. The film is used in a lithographic process for forming an image on a substrate.
Abstract:
THE PRESENT INVENTION OVERCOMES THE DIFFICULTIES FOUND IN THE BACKGROUND ART BY PROVIDING A DIRECT LOW RESISTIVE CONTACT (101, 102) BETWEEN DEVICES ON A SEMICONDUCTOR CHIP WITHOUT EXCESSIVE CURRENT LEAKAGE. CURRENT LEAKAGE IS PREVENTED IN THE PREFERRED DESIGN BY USING SILICON ON INSULATOR (SOI) CONSTRUCTION FOR THE CHIP. BY CONSTRUCTING THE DIRECT CONTACT OVER AN INSULATOR, SUCH AS SILICON DIOXIDE, CURRENT LEAKAGE IS MINIMIZED. THE PREFERRED EMBODIMENT USES SILICIDE (145, 147) TO CONNECT A POLYSILICON GATE (120, 122) TO A DOPED REGION (230, 235, 237, 830, 835, 837) OF THE SUBSTRATE. AN ALTERNATIVE EMBODIMENT OF THE PRESENT INVENTION PROVIDES FOR THE USE OF CONDUCTIVE STUDS (1910, 1920) TO ELECTRICALLY CONNECT DEVICES. AN INCREASED DENSITY OF APPROXIMATELY TWENTY PERCENT MAY BE REALIZED USING THE PRESENT INVENTION.