190 results about "Microcontact printing" patented technology

Compositions, devices, methods and systems are provided for differential functionalization of a surface of a structure to support biopolymer synthesis. Provided herein are processes which include use of lamps, lasers, and/or microcontact printing to add functional groups to surfaces for the efficient and uniform synthesis of oligonucleic acids.

A photonic switch according to the present invention may be formed using one of a selected group of non-linear optical materials. Each of the materials within this group has a refractive index that demonstrates a substantial peak as a function of wavelength, where the peak occurs at a wavelength distinct from the wavelength of the input signal. A method of producing a photonic switch according to the present invention includes fabricating source and drain waveguides using micro-molding or micro-contact printing processes, or MIMIC (micro-molding in capillaries) of a UV-curable polymer. If desired, a gate waveguide may also be formed in part by these processes. The photonic switch also includes a photonic crystal formed from non-linear optical material, which may be formed, for example, using a block copolymer and nanoparticle composite in a MIMIC or μfluidics process. Such a process may employ a functionalized mold material to align the blocks.

The embodiments disclosed herein are directed to fabrication methods useful for creating MEMS via microcontact printing by using small organic molecule release layers. The disclose method enables transfer of a continuous metal film onto a discontinuous platform to form a variable capacitor array. The variable capacitor array can produce mechanical motion under the application of a voltage. The methods disclosed herein eliminate masking and other traditional MEMS fabrication methodology. The methods disclosed herein can be used to form a substantially transparent MEMS having a PDMS layer interposed between an electrode and a graphene diaphragm.

The present invention provides an apparatus for producing patterns on a surface of a substrate. The apparatus includes a rigid support member such as a rigid tubular structure having first and second opposed ends and a fluid flow passageway extending therethrough. A printing stamp is attached at one of the opposed ends of the rigid support member. The printing stamp has a flexible diaphragm portion which has an outer surface which is coated with one or more materials in a pre-selected pattern. A pneumatic pressurizing mechanism communicating with an inner surface of the flexible diaphragm portion through the fluid flow passageway is used to bias the flexible diaphragm portion outwardly into intimate and substantially uniform contact with the surface of the substrate for transferring the pre-selected pattern onto said surface. The rigid tubular supports are attached to a robotic positioning mechanism for providing control of positioning of the stamp relative to the substrate surface.

There is disclosed a method of patterning an article (10) including a layer (12) of copper formed onto an insulating substrate (11) using a positive microcontact printing (MCP) process. In a preferred embodiment where the metal is copper (Cu) and the substrate is a silicon wafer, the method includes removing the native oxide presents on the Cu in a solution of HCl. Then, a stamp (13′) having a patterned polydimethylsiloxane (PDMS) body (14) is linked with a 0.2 mM solution of pentaerythritol-tetrakis(3-mercaptopropionate) (PTMP) in ethanol for 1 min, to form the inking layer (15′). The stamp is applied on the Cu layer to print a first self-assembled monolayer (SAM) (16′) according to a desired pattern. The article is dipped in a solution of ECT which is then adsorbed only in the non printed regions, forming a second SAM (18) in a configuration that is complementary to the desired pattern. Finally, the printed areas of the Cu layer are removed using a peroxodisulfate etch bath.

A system and method for processing large area substrates. In one embodiment, a system for processing large area substrates includes prep station, a stamping station and a stamp that is automatically moved between the stamping station and the prep station. The stamping station is adapted to retain a large area substrate thereon. The stamp has a patterned bottom surface that is adapted for microcontact printing. The prep station is for applying a precursor to the patterned bottom surface of the stamp. In one embodiment, a method for processing large area substrates includes the steps of disposing a large area substrate on a platen, inking a stamp adapted for microcontact printing, and automatically contacting a bottom of the stamp to the large area substrate supported on a platen.

Method for the Manufacture of Micro Structures A method for the manufacture of micro structures in substrates is provided. The method uses a combination of photolithographic mask technology and micro contact printing.

The process of derivatization and patterning of surfaces, and more particularly to the formation of self-assembled molecular monolayers on metal oxide surfaces using microcontact printing and the derivative articles produced thereby.

The invention belongs to the scientific field of materials, particularly relates to a preparation method for a multielement dissymmetrical microsphere and a heterogeneous microsphere shell. The method comprises the following steps: a single-layered non-close-packed silicon dioxide colloidal crystal is prepared through an improved micro-contact printing technology, and the dissymmetrical microsphere and the heterogeneous microsphere shell are prepared through the combination with an angle-controllable non-close-packed silicon dioxide colloidal crystal deposition and etching technology. During the whole process, the operation is simple and convenient, the consumption is low, the process is clean, the controllability is high, and high stability of the dissymmetrical microsphere and the microsphere shell are achieved. Various dissymmetrical microspheres compounded by various kinds of materials are simply prepared through controlling the period, the deposition angle and the deposition frequency of the non-close-packed colloidal crystal and the kind of the deposition materials, and the corresponding heterogeneous microsphere shell can be obtained through chemically etching the silicon dioxide microsphere. The dissymmetrical microsphere and the heterogeneous microsphere shell, which are prepared through the invention, have important significance in scientific researches or practical applications.

The invention discloses application of a zinc phthalocyanine complex as ink in micro-contact printing. The 2-propyl alcohol solution of 8(Octanohydroxamic)-zinc phthalocyanine serves as micro-contact printing ink; the pattern of a Polydimethylsiloxane (PDMS) seal is transferred to the surface of carboxylation polyethylene terephthalate, polyethylene naphthalate or polyimide substrate; and a delicate metal pattern is obtained on the substrate with a chemical plating method. The application of the zinc phthalocyanine complex as the ink in the micro-contact printing has the beneficial effect that the common phenomena of pattern inflation and pattern torsion in the micro-contact printing can be reduced by the phthalocyanine metal complex ink, and the phthalocyanine metal complex ink has a lowpreparation cost and great potential in the industrial application and is stable.

This invention discloses a fabrication method of organic thin-film transistors (OTFTs) using the micro-contact printing. The OTFT can be of the bottom-gate or top-gate configuration. The micro-contact printing operation of this fabrication method does not require clean-room environment and high processing temperature, and does not have the problem of 2D shrinkage of the printed patterns either. Furthermore, the pre-wetting technique employed in the micro-contact printing results in improved fidelity in the pattern transfer and solves the problems of pairing and cross-talking between neighboring patterns.

A process for preparing the patterned TiO2 microstructure includes such steps as photoetching on the surface of monosilicon to form a pattern, using it as template, filling polydimethylsiloxane on its surface, ageing, stripping to obtain an elastic seal, using TiO2 sol as í‹inkíŒ, microcontact printing on substrate by embossing to obtain the TiO2 film with patterned microstructure.

The invention discloses a terahertz wave quasi-optics polaroid sheet and a preparation method thereof. The terahertz wave quasi-optics polaroid sheet comprises a metal wire grating structure and a polymer substrate. The manufacturing method of the terahertz wave quasi-optics polaroid sheet comprises the step of printing metal on the clean and dry polymer substrate to manufacture the polaroid sheet with the wire grating structure through an aerosol spray printing or micro-contact printing method, wherein the metal comprises one of aluminum, gold, silver and copper, and materials of the polymer substrate are selected from a terahertz wave band high-permeability thin polymer film. The invention can realize the manufacturing method of the terahertz wave quasi-optics polaroid sheet which has low cost, high accuracy and more specialized application by utilizing an electronic printing technology.

The present invention is directed to methods for patterning substrates using contact printing to form patterns comprising a polymer, using the patterns formed therefrom as resists, and process products formed by the process.