203 results about "Chemical attack" patented technology

The present invention discloses a CMP pad dresser which has a plurality of uniformly spaced abrasive particles protruding therefrom. The abrasive particles are super hard materials, and are typically diamond, polycrystalline diamond (PCD), cubic boron nitride (cBN), or polycrystalline cubic boron nitride(PcBN). The abrasive particles are brazed to a substrate which may be then coated with an additional anti-corrosive layer. The anti-corrosive layer is usually a diamond or diamond-like carbon which is coated over the surface of the disk to prevent erosion of the brazing alloy by the chemical slurry used in conjunction with the CMP pad. This immunity to chemical attack allows the CMP pad dresser to dress the pad while it is polishing a workpiece. In addition to even spacing on the substrate, the abrasive particles extend for a uniform distance away from the substrate, allowing for even grooming or dressing of a CMP pad both in vertical and horizontal directions. A method of producing such a CMP pad dresser is also disclosed.

An electronic device enclosure having an integrated in-mold foil, which prevents fluid ingress around an included display of the electronic device, is disclosed. A portion of the in-mold foil is adapted to the specific contour and profile of the display, thereby allowing a user to use a touch screen interface of the display with no shortcomings. In addition, the in-mold foil protects the display from direct chemical attack, and may provide a liquid-tight seal between a button of the electronic device and the enclosure.

A dispensing cartridge for a relatively precise dispensing of various fluids having a relatively wide range of viscosities is disclosed. The dispensing cartridge in accordance with the present invention is relatively simpler in configuration than known dispensing cartridges while minimizing leakage of the fluid and eliminating problems associated with chemical attack of the O-ring by the fluid in the dispensing cylinder. In particular, the dispensing cartridge in accordance with the present invention includes a cylinder; a piston with a central bore and a bleed plug. In order to simplify the design, the air vent is configured as a tortuous path, for example, a spiral path, defined by a spiral bleed plug, which in a pre-staged position, allows air to freely escape along the spiral path along the circumference of the plug. As the piston contacts the fluid, the forward motion of piston is resisted by the high back pressure created by the small effective diameter and relatively long length of the spiral path. Once the piston contacts the fluid, the spiral plug is pushed into the piston closing the spiral path. By controlling the fluid flow by way of a tortuous path, the amount of fluid backflow through the piston is minimized if not eliminated, thus eliminating the need for an annular overflow chamber, thereby simplifying the design of the piston. In order to minimize problems related to the sealing of the piston within the dispensing cartridge, the piston may be provided with one or more radially extending sealing lips. These sealing lips are used in lieu of or in conjunction with an O-ring. The sealing lips further simplify the design by eliminating the O-ring as well as the need for an annular chamber adjacent thereto as well as problems relating to chemical attack of the O-ring by the fluid within the dispensing cylinder. In an alternative embodiment for use that is particularly adapted with non-aggressive fluids, the piston is provided with a single sealing lip and an O-ring.

Components of semiconductor processing apparatus comprise thermal sprayed yttria-containing coatings that provide erosion, corrosion and/or corrosion-erosion resistance in plasma atmospheres. The coatings can protect substrates from physical and/or chemical attack.

A method for sealing an exposed surface of a wire bond pad with a material that is capable of preventing a possible chemical attack during electroless deposition of Ni/Au pad metallurgy is provided. Specifically, the present invention provides a method whereby a TiN/Ti or TiN/Al cap is used as a protective coating covering exposed surfaces of a wire bond pad. The TiN/Ti or TiN/Al cap is not affected by alkaline chemistries used in forming the Ni/Au metallization, yet it provides a sufficient electrical pathway connecting-the bond pads to the Ni/Au pad metallization.

The present invention provides a new water purification method and system using reverse osmosis. In particular, the present invention provides methods and water purification systems using an ion exchange resin and absorbent media for pretreatment of water being fed to a reverse osmosis treatment system, where the pretreatment reduces fouling of, or deposits or chemical attack on the membrane surfaces and passageways. Particularly, a macroporous resin having an average pore diameter in the range of 1,000 to 500,000 Angstroms and a crush strength or Chatillon value of at least 24 g/bead (710 μm bead diameter) is used.

A thin polymer film having improved properties of reduced coefficient of thermal expansion (CTE), reduced shrinkage, increased modulus, and greater resistance to chemical attack is produced by a method wherein a plastic material is filled with a microfiller. Optimally, the present invention provides a micro-filled polyimide film.

Sensors mounted on vehicles (e.g., buses, taxis, police cars) and public personnel (e.g., policemen) are used to monitor various conditions and situations such as air quality, potential biological and chemical attacks, and road and traffic conditions. The invention improves upon the typical approach that deploys fixed sensors at every geographical position of interest. The total number of required sensors and the size and the complexity of the network infrastructure required to connect the sensors are reduced and simplified. A method for estimating the number of mobile sensors required to cover a region of interest also is disclosed. A relatively small number of mobile sensors may be sufficient to cover a large area at a lower cost and less complexity than a fixed sensor network.

Durable security devices that are resistant to chemical attack and mechanical degradation and security articles employing such devices, are provided. By way of the durable security device of the present invention, opposing longitudinal borders adjacent an information-bearing layer are sealed, thereby preventing corrosive and/or degrading materials from reaching this layer through these sealed borders. In a preferred embodiment, at least a portion of the information-bearing layer is fully encapsulated, thereby rendering this portion or layer and the information conveyed thereby, impervious to chemical attack.

A release resistant electrical interconnection comprising a gold-based electrical conductor compression bonded directly to a highly-doped polysilicon bonding pad in a MEMS, IMEMS, or MOEMS device, without using any intermediate layers of aluminum, titanium, solder, or conductive adhesive disposed in-between the conductor and polysilicon pad. After the initial compression bond has been formed, subsequent heat treatment of the joint above 363 C creates a liquid eutectic phase at the bondline comprising gold plus approximately 3 wt % silicon, which, upon re-solidification, significantly improves the bond strength by reforming and enhancing the initial bond. This type of electrical interconnection is resistant to chemical attack from acids used for releasing MEMS elements (HF, HCL), thereby enabling the use of a “package-first, release-second” sequence for fabricating MEMS devices. Likewise, the bond strength of an Au—Ge compression bond may be increased by forming a transient liquid eutectic phase comprising Au-12 wt % Ge.

The invention discloses a method of amphipathy fluorinated multipolymer modifying the surface of tetrafluoroethylene blownfilm. The fluorinated multipolymer is achieved by aggregating of fluorinated (methyl) ACR monomer A and (methyl) ACR monomer B. The preparing and modifying tetrafluoroethylene blownfilm is that: firstly, aggregate the fluorinated (methyl) ACR monomer A and (methyl) ACR monomer B to achieve amphipathy fluorinated random or amphiphilic block or triblock copolymer; then compound the copolymer with the tetrafluoroethylene blownfilm by the way of coating, to prepare hydrophile tetrafluoroethylene blownfilm which can achieve by stretching in one-way or two-way. The prepared hydrophile tetrafluoroethylene blownfilm not only has the characters of age resistant, resistant to chemical attack and wide applicable temperature, but also has good hydrophilicity, large water flux. The method can be suitable for the surface modifying of tabular, tubular and hollow fiber tetrafluoroethylene blownfilm.

The present invention generally relates to the method of creating a reliable and cost efficient electrochemical capacitor electrode that has an improved lifetime, lower production cost and improved process performance. The invention generally includes treating or conditioning an electrode surface by depositing a ruthenium containing layer, or layers, having good adhesion to the substrate, low electrical resistivity (high conductivity) and has good resistance to chemical attack during the operation of electrochemical capacitor. One aspect of the invention discussed herein is a method of forming an electrode by depositing a ruthenium containing layer at relatively low temperatures, such as <180° C.

The invention discloses a device for constantly loading pressure for testing the durability of reinforced concrete, comprising a touch screen, a controller, an electric hydraulic pump, an energy storage tank, a loading assembly, and a rapid freeze-thaw cycle instrument box, wherein, the loading assembly comprises fixed left and right baffle plates, a hydraulic jack is fixed on the inner side of one baffle plate, and a pressure sensor is fixed on the inner side of the other baffle plate, a plurality of slidable slide plates and specimen boxes comprising four-point bending backing plates and rubber boxes are parallelly arranged between the pressure sensor and the hydraulic jack, specimens are arranged in the specimen boxes; the touch screen is connected with a controller data line, the pressure sensor is connected with the controller data line, the controller is connected with an electric hydraulic pump data line, and the hydraulic jack is communicated with the electric hydraulic pump and the energy storage tank through a three-way pipe. According to the invention, real working conditions of the interaction of stress, chemical attack, dry-wet cycle or freeze-thaw cycle on a concretemember in a practical project can be simulated, thus the data obtained by laboratory tests has great value for engineering reference.

An air scrubber for eliminating an associated airborne contaminants and sterilizing air provided to protect against nocosomial infections, environmental allergens, weapons of biological and chemical attacks and operations requiring clean environment. The air scrubber includes a housing containing an alkali solution at pH 14 through which air passes and suspended liquid particles removed; provides are made for use in central air-conditioning systems, stand-alone applications and portable use along with respirators.

The invention relates to an acrylic polymer, modified with one or more hard core core/shell impact modifier, which is blended with one or more low melt viscosity polymer. The alloy formed by the blend has good impact properties, good melt processability, high modulus, high surface hardness, and excellent resistance to chemical attack.

Sealing (peel seal) membranes for packaging aggressive or chemically reactive products such as hair colorants over long periods without seal failure are described. Advantageously, the membranes and other packaging components have a high resistance to chemical attack and exhibit other advantageous characteristics, such as good barrier properties that minimize or eliminate interaction with the external environment, chemical inertness with respect to the product, and desirable heat sealing properties for prolonged adhesion without cracking and/or product leakage. The membranes comprise an inner bonding layer comprising a blend of polyethylene (PE) with an anti-cohesion additive, and a barrier layer.

The invention relates to an ultrathin wide teflon turning film and a manufacturing technology thereof. The technology comprises the steps of: (1) sieving raw materials, namely, screening Teflon suspension fine powder coarse waste by a 60-mesh vibrating sieve; (2) manufacturing blank, namely, manufacturing a cylindrical blank through a mould pressing manner and removing the inner stress of the blank; (3) sintering; (4) after preheating of the blank, turning the blank by a high-precision numerically-controlled lathe; and (5) rolling. The width of the turning film is 200-2000mm, and the thickness of the turning film is 0.02-0.50mm. According to the technology, the calendering step in the traditional technology is omitted, the technology steps and construction installation equipment are improved, the turning film is doubled in width compared with the traditional products, the film is uniform in thickness, is not easy to curl, has excellent performances such as impact resistance, wear resistance, chemical attack resistance and self-lubrication, can be used for a long time under an environment being +250 DEG C to -180 DEG C, and can basically meet the requirement of the market on the ultrathin wide teflon film.

The invention discloses the base material and self-adhering water-proofing coiled material made with the base material. The base material is made by the modified PVC material, comprising PVC, polyester plasticity agent, modifier, filling agent, stabilizer, lubricating agent and antiaging agent. On the surface of base material add creep rubber bitumen self-adhering layer and non-stick coating to get self-adhering water-proofing coiled material. The self-adhering water-proofing coiled material has good physical-mechanical properties, thermal distortion property, elasticity, cold-resistant, flame-proof, abrasion-proof and resistance to chemical attack; it also has low volatility and long life.

Components of semiconductor processing apparatus are formed at least partially of erosion, corrosion and/or corrosion-erosion resistant ceramic materials. Exemplary ceramic materials can include at least one oxide, nitride, boride, carbide and/or fluoride of hafnium, strontium, lanthanum oxide and/or dysprosium. The ceramic materials can be applied as coatings over substrates to form composite components, or formed into monolithic bodies. The coatings can protect substrates from physical and/or chemical attack. The ceramic materials can be used to form plasma exposed components of semiconductor processing apparatus to provide extended service lives.