35 results about "Parylene C" patented technology

A coated coronary stent, comprising: a stainless steel sent framework coated with a primer layer of Parylene C; and a rapamycin-polymer coating having substantially uniform thickness disposed on the stent framework, wherein the rapamycin-polymer coating comprises polybutyl methacrylate (PBMA), polyethylene-co-vinyl acetate (PEVA) and rapamycin, wherein substantially all of the rapamycin in the coating is in amorphous form and substantially uniformly dispersed within the rapamycin-polymer coating.

The invention discloses a flexible retina emboss micro-electrode chip in the technical field of a micro-electronic-mechanical-system and a manufacture method thereof. In the method, parylene C is used as a flexible substrate and an insulating material for preparing a micro-electrode array which is formed by the arrangement of a plurality of micro-electrode sensing elements; simultaneously, an electrode lead and a lead welding point are manufactured to form the flexible retina emboss micro-electrode chip which is planted into the retina part of a human eye, can realize the safe and effective contact with the neuron of the retina, effectively reduce the stimulation to a pulse current, reduce the inserting damage to a biological tissue caused by the planting of the micro-electrode and can improve the effect of electric simulating and neural signal recording, thereby better recovering the visual function. In the invention, the parylene C is used as the substrate of a flexible electrode; the excellent electric insulating performance and mechanical performance thereof can improve the biocompatibility of the micro-electrode chip to a larger extent and have good stability for a long period. In the invention, an MEMS technique is adopted, thus realizing the integration of a functional unit and the flexible substrate of the micro-electrode.

Thin parylene C membranes having smooth front sides and ultrathin regions (e.g., 0.01 μm to 5 μm thick) interspersed with thicker regions are disclosed. The back sides of the membranes can be rough compared with the smooth front sides. The membranes can be used in vitro to grow monolayers of cells in a laboratory or in vivo as surgically implantable growth layers, such as to replace the Bruch's membrane in the eye. The application further provides an implantable cage-like apparatus for culturing cells comprising the parylene membrane.

A micro electromechanical (MEMS) antenna (36) is positioned on one side of a substrate and is connected to a MEMS switch comprising a capacitor bridge (46) and to a transmission line (42) by means of a thru hole or via (48) which forms an electrically conducting path through the substrate. This arrangement provides a common ground plane for the antenna and switch and shields the switch from the electromagnetic radiation received or transmitted from the antenna. The switch may comprise a topmost metal layer which extends across a bridge structure formed by a polymer layer (19). The polymer layer comprises poly-monochloro-para-xylene (parylene-C). Homogeneous or heterogeneous antenna array structures are implemented. The antenna arrays may include one or more different type of antennas with for example different shapes, rotations and reflections.

The invention discloses a method of regulating the surface wettability of a parylene c (PC) by virtue of surface patterning. The method comprises the following steps: ultrasonically washing the PC, and then drying the PC for standby application; processing the PC by virtue of air plasma for standby application; then smearing a polymer coating rich in polarity groups such as hydroxyl, carboxyl, amino group and the like on the surface of the PC, and drying; placing a patterned mask above the processed PC, and then carrying out a cross-linking reaction under the effect of UV/O3; after the cross-linking is completed, soaking in deionized water to wash out unreacted and ungrafted polymer coating rich in the polarity groups, and then drying to obtain a patterned PC with controllable surface wettability. According to the method of regulating the surface wettability of the PC by virtue of the surface patterning, the wettability is adjustable, a surface water contact angle can be regulated and designed in a range of 5 to 90 degrees, so that the surface wettability of the PC can be precisely designed according to the real requirement of different fields, and the yield of products is increased.

The invention belongs to the technical field of optical fiber sensing and trace gas detection, and relates to a poly(monochloro-p-xylene)-based membrane resonance type gas sensor and a detection system. The gas sensor adopts a structure of an F-P interferometer; and an F-P cavity of the F-P interferometer is also a non-resonance photoacoustic tank a photoacoustic system. Parylene-C has relativelylow young modulus and relatively large elongation at break, so that a Parylene-C membrane prepared through a vacuum vapor phase polymerization deposition has the characteristics of strong coating property and high deposition uniformity; therefore Parylene-C membrane prepared through the vacuum vapor phase polymerization deposition has the characteristics of large radius and thin thickness. The inherent resonance frequency of the F-P interferometer is in direct proportion to the thickness of the diaphragm and is inversely proportional to the square of the radius of the diaphragm, so that the resonance frequency of the F-P interferometer can be as low as several tens of hertz. The invention provides a novel technical means for high-sensitivity long-distance gas telemetering in a narrow space.

The invention provides a preparing method of a ring-shaped Kraft microelectrode based on self-stress bending. According to the method, in the preparing process, the ring-shaped bending based on the self stress is realized through controlling the thickness of Parylene-C layers and the heat treatment conditions and regulating the self-stress conditions of different Parylene-C layers, and a Kraft electrode is formed. The preparing method has the advantages that the operation is simple and convenient, and a series of annular Kraft electrodes in different diameters can be formed.

The invention relates to an applied technology of micro-robots in the fields of cell operation and cell separation, in particular to a micro-actuator driven by heating from electricity and a process for preparation. The micro-actuator driven by heating from electricity is composed of a polymeric material of Parylene C and electron-heating materials of titanium and platinum and is capable of realizing the operation of clamping cells under the fluid environment. The actuator is a multiple cantilever beam structure and is fixed on a silicon substrate, and each cantilever beam is a three-layer structure of parylene C clamping the electron-heating materials. The processing technique employs screen-printing technology of MEMS (micro-electro-mechanism system). The invention is capable of being electrically driven, and parylene C is taken as heat/ electricity/ fluid isolation material, then a heater formed by electron-heating materials is not exposed in the fluid, thereby having good biological adaptability and fluid environment adaptability, being capable of realizing cell operation and cell separation by controlling the temperature and providing automatic operation and application of localization detection, injection and measuring of cells.

A parylene C polymer that is electrically poled such that it is piezoelectric is presented. Methods for manufacturing the piezoelectric parylene C polymer with an optimal piezoelectric coefficient d33 are also disclosed. Actuators formed with piezoelectric parylene C are disclosed as well as sensor devices that incorporate piezoelectric parylene C using charge integrator circuits in which the integration time is longer than likely adiabatic temperature transients.

The present invention relates to the application of miniature robot technology in cell operation and separation, and is especially one new kind of thermally driven miniature executor based on Parylene C polymer material and capable of realizing cell operation in liquid environment. The miniature executor has multiple cantilever beam structure fixed on silicon substrate, and each of the cantilever beams is a three layer structure with Parylene C sandwiched resistive material. The miniature executor is prepared through one MEMS planar printing process. The present invention has electrothermal braking effect, and Parylene C as one kind of thermally, electrically and chemically isolating material may keep the heater of resistive material from exposing in liquid, resulting in excellent biocompatibility and environmental suitability. The present invention realizes cell operation and separation under controlled temperature and may be used in automatic cell location, detection, injection and measurement.

The invention relates to a multi-layer composite protection layer applied to PCB and a method. The multi-layer composite protection layer comprises a nano silicon dioxide coating, Parylene C coating,and epoxy resin coating which are arranged inside to outside, and the thickness of the Parylene C coating is 30-40 [mu]m. The application method comprises the steps of: 1) cleaning and dehumidifying the surface of a PCB; 2) socking the cleaned PCB into a nanosilicon dioxide liquid to obtain a PCB with a surface coated with nanosilicon dioxide; 3) coating a Parylene C material at the surface of thePCB with the surface coated with nanosilicon dioxide by employing a vacuum chemical vapor deposition method; and 4) obtaining the epoxy resin material at the surface of the PCB obtained in the step 3). The PCB is good in waterproof performance, can normally work in a soaking environment and has a good mechanical performance.

Embodiments include inflatable articles that include an interior surface adapted for being in contact with the inflation gas, the interior surface coated with a parylene barrier. The parylene barrier may be formed of parylene N, parylene C, parylene D, another substituted parylene or combinations thereof. In particular embodiments, the inflatable article is a tire. Other embodiments include inflatable articles having composite layers, wherein at least two of the composite layers include surfaces that interface with one another and a parylene coating applied to at least one of the interfacing surfaces.

The invention relates to the technical field of biological medicine and advanced manufacturing, and provides a flexible microporous membrane, a filtering device for filtering and removing nucleated cells including tumor cells in autoblood, a detection system comprising the filtering device, a liquid sample treatment system and an autoblood transfusion system. The filtering device comprises a filtering structure containing a Parylene C membrane, the Parylene C membrane contains uniform holes, and the permissible diameter range of the holes is 4 to 8 microns.

An ablation probe which includes a probe body with a distal and proximal end, an ablation tip at the distal end of the probe body, an anode provided proximate to the ablation tip, a coaxial cable disposed within the probe body and coupled to the ablation tip and anode so that electromagnetic energy of a predetermined frequency is communicated thereto for dielectric heating of tissue, and a Parylene C coating on at least the ablation tip and anode to electrically isolate the ablation tip and anode from tissue without interference with microwave energy transmission through the probe to the tissue. The Parylene C is a vapor deposited coating on at least the ablation tip and anode to electrically isolate the ablation tip and anode from tissue.

The invention discloses a multi-channel micro-ring sensor and a preparation and use method thereof, the multi-channel micro-ring sensor comprises a sensing substrate, a waveguide micro-ring, a coating exposed sensing area and an optical fiber array, the waveguide micro-ring is manufactured on the sensing substrate by adopting a standard tape-out process, and the waveguide micro-ring comprises an input waveguide, two output waveguides and a micro-ring; according to the present invention, the multi-parameter detection purpose which can only be achieved through the traditional micro-fluidic channel is improved to the combination of the parylene C film hydrophobic effect and the microspotting instrument, such that the specific protein is fixed on the micro-ring surface through the one-step method so as to simplify the chip preparation and modification process, and the traditional micro-fluidic channel is adopted such that the size of the chip cannot be too small. The method does not depend on a microfluidic channel, the size of the chip is reduced, the higher integration level is achieved, meanwhile, the parylene C thin film one-step method is used for fixing the specific antibody, after detection is completed, parylene C can be removed, the chip is recycled, and the cost is reduced.

The invention discloses a reusable optical biosensor chip and a method for realizing reuse of the optical biosensor chip, and relates to the field of biosensing. A parylene C film is attached to the surface of a nano structure of the optical biosensor chip, and the parylene C film is coupled with an antibody and an antigen; and the nanostructure of the optical biosensor chip is coupled with the antibody and the antigen thereof by using parylene C, and parylene C is removed after the detection is completed. The parylene C film is used as a coupling bridge between the optical biosensor chip nanostructure and the specific antibody, a specific parylene C growth thickness and a removal method are adopted, the surface property of the nanostructure is not influenced, parylene C can be grown on the chip again, and a spectral result shows that the spectrum of the chip after parylene C is removed completely coincides with that of an initial chip.