2095 results about "Porous layer" patented technology

The present invention is a process for forming an air gap within a substrate, the process comprising: providing a substrate; depositing a sacrificial material by deposition of at least one sacrificial material precursor; depositing a composite layer; removale of the porogen material in the composite layer to form a porous layer and contacting the layered substrate with a removal media to substantially remove the sacrificial material and provide the air gaps within the substrate; wherein the at least one sacrificial material precursor is selected from the group consisting of: an organic porogen; silicon, and a polar solvent soluble metal oxide and mixtures thereof.

A process for producing a semiconductor substrate is provided which comprises steps of forming a porous layer on a first substrate, forming a nonporous monocrystalline semiconductor layer on the porous layer of the first substrate, bonding the nonporous monocrystalline layer onto a second substrate, separating the bonded substrates at the porous layer, removing the porous layer on the second substrate, and removing the porous layer constituting the first substrate.

Alkaline and lithium batteries are disclosed that advantageously include separators comprising at least one porous layer of fine fibers having a diameter of between about 50 nm and about 3000 nm that provide improved combinations of reduced thickness, dendritic barrier against short-circuiting and low ionic resistance as compared with known battery separators.

A medical device comprising radiopaque water-dispersible metallic nanoparticles, wherein the nanoparticles are released from the medical device upon implantation of the device. The medical device of the present invention is sufficiently radiopaque for x-ray visualization during implantation, but loses its radiopacity after implantation to allow for subsequent visualization using more sensitive imaging modalities such as CT or MRI.The nanoparticles are formed of a metallic material and have surface modifications that impart water-dispersibility to the nanoparticles. The nanoparticles may be any of the various types of radiopaque water-dispersible metallic nanoparticles that are known in the art. The nanoparticles may be adapted to facilitate clearance through renal filtration or biliary excretion. The nanoparticles may be adapted to reduce tissue accumulation and have reduced toxicity in the human body. The nanoparticles may be applied directly onto the medical device, e.g., as a coating, or be carried on the surface of or within a carrier coating on the medical device, or be dispersed within the pores of a porous layer or porous surface on the medical device. The medical device itself may be biodegradable and may have the nanoparticles embedded within the medical device itself or applied as or within a coating on the biodegradable medical device. The nanoparticles may be released by diffusion through the carrier coating, disruption of hydrogen bonds between the nanoparticles and the carrier coating, degradation of the nanoparticle coating, degradation of the carrier coating, diffusion of the nanoparticles from the medical device, or degradation of the medical device carrying the nanoparticles.

Solid-state, ion-conducting batteries with an ion-conducting, solid-state electrolyte. The solid-state electrolyte has at least one porous region (e.g., porous layer) and a dense region (e.g., dense layer). The batteries are, for example, lithium-ion, sodium-ion, or magnesium-ion conducting solid-state batteries. The ion-conducting, solid-state electrolyte is, for example, a lithium-garnet material.

A method of producing a semiconductor member comprises a first step of preparing a first member having a non-porous layer on a semiconductor substrate, and a second step of transferring the non-porous layer from the first member onto a second member, wherein use of the semiconductor substrate from which the non-porous layer is separated in the second step as a constituent material of the first member in the first step is conducted (n-1) times ("n" is a natural number not less than 2), the first and second steps are repeated n times, the semiconductor substrate is separated in n-th use in the second step and the separated semiconductor substrate is used for an use other than that of the first and second steps.

The present invention relates generally to medical devices with therapy eluting components and methods for making same. More specifically, the invention relates to implantable medical devices having at least one porous layer, and methods for making such devices, and loading such devices with therapeutic agents. A mixture or alloy is placed on the surface of a medical device, then one component of the mixture or alloy is generally removed without generally removing the other components of the mixture or alloy. In some embodiments, a porous layer is adapted for bonding non-metallic coating, including drug eluting polymeric coatings. A porous layer may have a random pore structure or an oriented or directional grain porous structure. One embodiment of the invention relates to medical devices, including vascular stents, having at least one porous layer adapted to resist stenosis or cellular proliferation without requiring elution of therapeutic agents. The invention also includes methods, devices, and specifications for loading of drugs and other therapeutic agents into nanoporous coatings.

The invention relates to the preparation of a thin layer comprising a step in which an interface is created between a layer used to create said thin layer and a substrate, characterized in that said interface is made in such way that it is provided with at least one first zone (Z1) which has a first level of mechanical strength, and a second zone (Z2) which has a level of mechanical strength which is substantially lower than that of the first zone. Said interface can be created by glueing surfaces which are prepared in a differentiated manner, by a layer which is buried and embrittled in a differentiated manner in said zones, or by an intermediate porous layer.

[Object] To provide a multilayer assembly that excels in pore properties, is flexible, and is satisfactorily handled and processed; and a method of producing the multilayer assembly.[Solving Means] A multilayer assembly includes a base and, arranged on at least one side thereof, a porous layer and has a large number of continuous micropores with an average pore diameter of 0.01 to 10 μm. The multilayer assembly suffers from no interfacial delamination between the base and the porous layer when examined in a tape peeling test according to the following procedure:Tape Peeling TestA 24-mm wide masking tape [Film Masking Tape No. 603 (#25)] supplied by Teraoka Seisakusho Co., Ltd. is applied to a surface of the porous layer of the multilayer assembly and press-bonded thereto with a roller having a diameter of 30 mm and a load of 200 gf to give a sample; and the sample is subjected to a T-peel test with a tensile tester at a peel rate of 50 mm / min.

A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components or acetabular cups. The method, in one embodiment thereof, comprises providing a structured porous layer; providing a dense metal substrate; providing a binding mixture; applying the binding mixture to the exterior of the substrate; placing the porous layer against the substrate such that the binding mixture is disposed there between forming an assembly; and heat treating the assembly to metallurgically bond the porous layer to the substrate.

The invention relates to a method of manufacturing layer-like structures in which a material layer having hollow cavities, preferably a porous material layer, is produced on or out of a substrate consisting, for example, of monocrystalline p-type or n-type Si and in which the layer-like structure, or a part of it, is subsequently provided on the cavity exhibiting or porous material layer. The layer-like structure, or a part of it, is subsequently separated from the substrate using the layer having the hollow cavities, or porous layer, as a point of desired separation, for example through the production of a mechanical strain within or at a boundary surface of the cavity exhibiting or porous layer. The method is characterized in that the surface of the substrate is structured prior to the production of the porous layer, or in that the surface of the porous layer is structured.

A method for manufacturing a bonded substrate that has an insulator layer in part of the bonded substrate includes: partially forming a porous layer or forming a porous layer whose thickness partially varies on a bonding surface of the base substrate; performing a heat treatment to the base substrate having the porous layer formed thereon to change the porous layer into the insulator layer, and thereby forming the insulator layer whose thickness partially varies on the bonding surface of the base substrate; removing the insulator layer whose thickness varies by an amount corresponding to a thickness of a small-thickness portion by etching; bonding the bonding surface of the base substrate on which an unetched remaining insulator layer is exposed to a bond substrate; and reducing a thickness of the bonded bond substrate and thereby forming a thin film layer.

A ventilated vehicle seat includes a porous upper surface layer, a resinous film non-porous first layer, a non-porous second layer, and a spacer layer. The resinous film non-porous first layer is beneath the upper surface layer and includes ventilation holes. The spacer layer is between the non-porous layers for providing cushioning and for ensuring airflow in lateral, longitudinal and perpendicular directions, even when the seat is occupied. The spacer layer is fixed in position between the first layer and the second layer for preventing slipping of the spacer layer.

A composite product is disclosed as a collagen support comprising at least one porous collagen layer covered on at least one side with an essentially compact collagen membrane consisting either of a collagen film prepared by drying a collagen gel, preferably in air or a gaseous fluid, or of a very highly compressed collagen sponge. At least one of the two layers, i.e. the porous layer and the essentially compact membrane, may comprise normal, genetically modified or malignant living cells originating particularly from young or elderly subjects. This composite product is used as a collagen support for the manufacture of artificial skin intended especially for performing in vitro tests on the efficacy of potentially active substances or for reconstructing damaged areas of skin in vivo.

A ventilated vehicle seat includes a first portion and a tongue portion. The first portion includes a porous upper surface layer, a non-porous first inner layer that is adjacent to the upper surface layer and that includes ventilation holes, a non-porous lower surface layer, and an expanded spacer layer between the non-porous layers that provides an air space. The tongue portion includes a tongue that is integrally-formed with the first portion. The tongue extends from the edge of the first portion and includes an opening in one of the non-porous layers. The opening provides access to the air space within the expanded spacer layer.

The invention relates to a micro-device with a cavity (50), the micro-device comprising a substrate (10, 110), the method comprising steps of: A) providing the substrate (10, 110), having a surface and comprising a sacrificial oxide region (20, 107, 115) at the surface ( ); B) covering the sacrificial oxide region (20, 107, 115) with a porous layer (40, 114, 124) being permeable to a vapor HF etchant (100), and C) selectively etching the sacrificial oxide region (20, 107, 115) through the porous layer (40, 114, 124) using the vapor HF etchant (100) to obtain the cavity (50). This method may be used in the manufacture of various micro-devices with a cavity (50), i.e. MEMS devices, and in particular in the encapsulation part thereof, and semiconductor devices, and in particular the BEOL-part thereof.

A test strip for determining the concentration of an analyte in a body fluid includes a membrane in fluid communication with a porous layer. The membrane and the porous layer are divided into compressed portions, which restrict the capillary flow of the body fluid, and uncompressed portions. The uncompressed portions are adapted to absorb and retain body fluids in excess of the amount required for operation of the test strip. The test strip may be constructed with an internal relief chamber to accommodate the uncompressed portions. A method of making the test strip by pressure and / or heat sealing individual components on a shaping die is also provided.

The present invention is directed to a process for forming a drug delivery device by electroplating onto a substrate a porous layer having pores of a controlled size and density and loading a drug into the pores. Preferably the drug delivery device is a gold stent plated with a gold porous layer.

A pressure wave generator is provided, which has excellent output stability over time. This pressure wave generator comprises a substrate, a heat generating layer, and a heat insulating layer formed between the substrate and the heat generating layer. A pressure wave is generated in a surrounding medium (air) by a change in temperature of the heat generating layer, which is caused upon energization of the heat generating layer. The heat insulating layer comprises a porous layer and a barrier layer formed between the porous layer and the heat generating layer to prevent diffusion of reactive substances such as oxygen and moisture in the air and impurities into the porous layer. By the formation of the barrier layer, it is possible to prevent a reduction in output of the pressure wave generator caused by a change over time of the porous layer.

An anti-reflection coating having a luminous reflectance of 2% or less to light at an incident angle of 0-60° and excellent scratch resistance, which comprises a dense layer and a porous silica aerogel layer formed in this order on a substrate such that a refractive index successively decreases from said substrate to said porous layer.

A field emission device having bundles of aligned parallel carbon nanotubes on a substrate. The carbon nanotubes are oriented perpendicular to the substrate. The carbon nanotube bundles may be up to 300 microns tall, for example. The bundles of carbon nanotubes extend only from regions of the substrate patterned with a catalyst material. Preferably, the catalyst material is iron oxide. The substrate is preferably porous silicon, as this produces the highest quality, most well-aligned nanotubes. Smooth, nonporous silicon or quartz can also be used as the substrate. The method of the invention starts with forming a porous layer on a silicon substrate by electrochemical etching. Then, a thin layer of iron is deposited on the porous layer in patterned regions. The iron is then oxidized into iron oxide, and then the substrate is exposed to ethylene gas at elevated temperature. The iron oxide catalyzes the formation of bundles of aligned parallel carbon nanotubes which grow perpendicular to the substrate surface. The height of the nanotube bundles above the substrate is determined by the duration of the catalysis step. The nanotube bundles only grow from the patterned regions.

Embodiments of the invention include multi-layered coatings for controlling the elution rates of active agents and methods. In an embodiment, the invention includes a method of applying an elution control coating to a substrate. The method can include depositing a coating solution onto the substrate to form a base layer. The method can also include selecting a desired concentration of the solvent based on a desired elution rate. The method can further include removing solvent from the base layer to reach a desired concentration of the solvent and depositing a layer of parylene on the base layer. In an embodiment, the invention can include a medical device including a substrate, a base layer, and a porous layer. The base layer can include a polymeric matrix and an active agent dispersed within the polymeric matrix. The porous layer can include parylene. Other embodiments are also included herein.

A disposable sleeve for compression therapy, with at least one inflatable air cell defined between a first airtight wall adjacent a patient's body to be treated and a second airtight wall. Each of the first and second walls comprises an external porous layer and an internal layer comprising air-tight polyethylene (PE). The walls are bonded by molten portions of the PE internal layer penetrating and set in their corresponding external porous layers and welded to each other, the bonding enduring at least 250 inflation-deflation cycles associated with the therapy.

A separator for a lithium secondary battery includes a high molecular porous film with a shut-down function and a heat-resistant porous layer integrally formed on each side of the high molecular porous film. The heat-resistant porous layers contain a heat-resistant high-molecular material and a ceramic filler. By using the separator, the occurrence of a short-circuit due to the melting and shrinkage of the high molecular porous film is prevented. Also, in the event of a short-circuit and the generation of heat higher than the melting point of the material of the high molecular porous film, the expansion of the short-circuit is prevented, so that the safety of the lithium secondary battery is improved.

Multilayer structures including a porous layer and a non-porous layer having a reinforcement member are useful as dural repair materials.

A process for producing an electrode for an alkali metal battery, comprising: (a) Continuously feeding an electrically conductive porous layer to an anode or cathode material impregnation zone, wherein the conductive porous layer has two opposed porous surfaces and contain interconnected conductive pathways and at least 70% by volume of pores; (b) Impregnating a wet anode or cathode active material mixture into the porous layer from at least one of the two porous surfaces to form an anode or cathode electrode, wherein the wet anode or cathode active material mixture contains an anode or cathode active material and an optional conductive additive mixed with a liquid electrolyte; and (c) Supplying at least a protective film to cover the at least one porous surface to form the electrode.

A method of forming a high-quality relaxed SiGe alloy layer on a bulk Si-containing substrate is provided. The method of the present invention includes growing a strained SiGe alloy layer on a Si-containing substrate that has a porous Si-containing layer at or near the surface of the Si-containing substrate. The porous layer is formed by an electrolytic anodization process. The pores create free volume below the strained SiGe layer which can serve to accommodate strain relaxation during SiGe deposition or a subsequent heating step. The subsequent heating step is optional and is performed to further increase the relaxation of the SiGe alloy layer. The buried porous structure allows for a unique relaxation mechanism compared to prior art methods.