Methods of fabricating low pressure silicon transducers
OF FIGURES Referring to FIG. 1, there is shown a partial top view of a silicon wafer 10 having diffused therein a plurality of piezoelectric devices 11, each associated with a separate bridge pattern... Read More
Inventors: Kurtz, Anthony D.;, Assignee: Kulite Semiconductor Products, Inc. (Ridgefield, NJ) |
Interdigitated IMPATT devices
What is claimed is: 1. A method of forming a monolithic semiconductor structure which comprises the steps of: (a) providing a semiconductor substrate having an active region on a portion of the surfac... Read More
Inventors: Bayraktaroglu, Burhan;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Photosensitive polymers as coating materials
What is claimed is: 1. A process for the preparation of a relief image on a carrier which comprises exposing a coating of a radiation-sensitive polymer applied on said carrier whereein the polymer is ... Read More
Inventors: Pfeifer, Josef;, Assignee: Ciba-Geigy Corporation (Ardsley, NY) |
Method of manufacturing a thick film resistor element
Therefore, an object of the present invention is to provide a method which can provide a thick film resistor element having an accurate resistance value. To achieve the object, the present invention p... Read More
Inventors: Nii, Minoru; Fukuoka, Yoshitaka;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Additives process for producing plated holes in printed circuit elements
OF THE INVENTION Printed circuit boards with plated-through-holes are prepared from photosensitive elements, preferably photohardenable elements, and more preferably, photopolymerizable elements. The... Read More
Inventors: Peiffer, Robert William;, Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Electroless plating of polyvinylidene fluoride
Continuous, adherent metal layers on polyvinylidene fluoride (PVDF) are achievable if a very particular series of steps prior to the actual electroless plating are performed. First the plastic must b... Read More
Inventors: Schiavone, Lawrence M.;, Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ) |
Method of selectively depositing a metal on a surface of a substrate
This invention relates to a method of selectively depositing a metal on a surface of a substrate, and more particularly, to depositing a metal pattern on a non-conductive substrate utilizing a method ... Read More
Inventors: Beckenbaugh, William M.; De Angelo, Michael A.;, Assignee: Western Electric Co., Inc. (New York, NY) |
Deposition of metals as interlayers within organic polymeric films
OF THE INVENTION For further comprehension of the invention and of the objects and advantages thereof, reference may be made to the following description, including the examples, the accompanying dra... Read More
Inventors: Mazur, Stephen;, Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Process for activating substrates for electroless metallization
I claim: 1. Process for activating non-conductive or semiconductive substrate surfaces for the purpose of electroless metallisation, characterised in that (a) the surface to be metallised is wetted wi... Read More
Inventors: Giesecke, Henning;, Assignee: Bayer Aktiengesellschaft (Leverkusen, DE) |
Metal interlayers in films by counter-current diffusion
OF THE INVENTION For further comprehension of the invention and of the objects and advantages thereof, reference may be made to the following description, including the examples and the accompanying ... Read More
Inventors: Manring, Lewis E.; Mazur, Stephen;, Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Metallized polymers
We claim: 1. A process for the deposition of metal layers onto at least one polymeric surface having electroactive sites therein comprising contacting said at least one polymeric surface with a first ... Read More
Inventors: Krause, Larry J.; Rider, Jack A.;, Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN) |
Process for etching polytetrafluoroethylene
OF THE INVENTION The definitions of the following terms are provided as an aid to understand the present invention. Adhesion refers to the state in which two dissimilar bodies are held together by in... Read More
Inventors: Leonard, Elizabeth C.; Erwin, Lewis;, Assignee: Massachusetts Institute of Technology (Cambridge, MA) |
Derivatives of compounds containing a carbonyl group conjugated to an aromatic moiety and electrophilic methods of fabrication thereof
OF THE PREFERRED Embodiments The inventions will be described with reference to polyimide materials as the referred materials. The inventions are applicable to any material or compound containing a c... Read More
Inventors: Goldberg, Martin J.; Morris, Daniel P.; Viehbeck, Alfred;, Assignee: International Business Machines Corporation (Armonk, NY) |
Process for sealing aluminum oxide films
OF THE INVENTION The aluminum oxide films which are to be sealed employing the compositions and process of the invention may be prepared in various ways. Conventionally, the aluminum is anodized by p... Read More
Inventors: Patel, Pinakin; Ranieri, Richard L.;, Assignee: Sandoz Ltd. (Basle, CH) |
Method and apparatus for quantitative measurement of organic contaminants remaining on cleaned surfaces
OF PREFERRED EMBODIMENTS The method and apparatus of the present invention is useful in determining the organic contamination on the surface of electronic circuit assemblies (ECA), for example, print... Read More
Inventors: Hausman Hazlitt, Andrea Jo; Richey, Warren F.;, Assignee: The Dow Chemical Company (Midland, MI) |
Siloxane copolymers containing alkenyl groups, process for preparing the same and their use
What is claimed is: 1. A siloxane copolymer having alkenyl groups and contains (a) siloxane units of the formula ##STR13## in which R is selected from the group consisting of hydrocarbon radicals havi... Read More
Inventors: Herzig, Christian;, Assignee: Wacker-Chemie GmbH (Munich, DE) |
Lubricious radiation stable polymeric composition and articles therefrom
One aspect of the present invention is a lubricious polymeric composition which may be radiation sterilized without degradation due to the radiation. The composition includes a polyolefin having a nar... Read More
Inventors: Payne, Jr., Donald N.; Waller, Jess M.; Clarke, Richard P.; Titus, George R.; Martin, David A.;, Assignee: Becton, Dickinson and Company (Franklin Lakes, NJ) |
Hybrid polymers derived from Si-H containing organosilicon polymers and unsaturated metal alkoxides
OF THE INVENTION We have now discovered a method to protect carbon/carbon composites against oxidation at high temperatures. This process comprises coating the surface of the carbon/carbon composite ... Read More
Inventors: Seyferth, Dietmar; Targos, Tom;, Assignee: Massachusetts Institute of Technology (Cambridge, MA) |
Preceramic metallopolysilanes
That which is claimed is: 1. A method of preparing a metallopolysilane, which method comprises (A) contacting a polysilane with a metallic compound capable of generating open coordination sites where ... Read More
Inventors: Burns, Gary T.; Zank, Gregg A.;, Assignee: Dow Corning Corporation (Midland, MI) |
Preceramic organosilicon-metal carbonyl polymers
OF INVENTION We have now discovered new preceramic polymers whose ceramic yield upon pyrolysis is typically greater that that of the organosilicon polymer precursor. This hybrid polymer is formed by ... Read More
Inventors: Seyferth, Dietmar; Sobon, Christine A.; Borm, Jutta;, Assignee: Massachusetts Institute of Technology (Cambridge, MA) |
Preparation of silicon carbide ceramics from the modification of an Si-H containing polysilane
OF THE INVENTION We have now discovered that mixing organopolysilanes having a plurality of Si--H functional groups with an effective amount of metallocene compound, and allowing such mixture to unde... Read More
Inventors: Seyferth, Dietmar; Tracy, Henry J.; Robison, Jennifer L.;, Assignee: Massachusetts Institute of Technology (Cambridge, MA) |
Method of etching silicon by enhancing silicon etching capability of alkali hydroxide through the addition of positive valence impurity ions
In accordance with the present invention, the silicon-etching performance limitations of conventional alkali hydroxide solution are substantially reduced by the controlled addition of etch-enhancing i... Read More
Inventors: Lowry, Robert K.; Adams, Edward U.;, Assignee: Harris Corporation () |
Method of anisotropically etching silicon wafers and wafer etching solution
In the practice of the invention, silicon wafers to be etched are preferably immersed in the etching solution. Preferably, this is carried out at a temperature of about 100.degree.-125.degree. C., mo... Read More
Inventors: Austin, Larry W.; Linde, Harold G.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Copper etchant solution additives
It is therefore an object of the invention to provide accelerants for accelerating the etching rate of an alkaline ammoniacal cupric chloride etchant without using thiourea. It is also an object of th... Read More
Inventors: Richardson, Hugh W.; Jordan, Charles F.;, Assignee: Phibro-Tech, Inc. (Ft. Lee, NJ) |
Pattern forming method
It is the object of this invention to provide a method for forming a pattern which has high resolution and excellent etching resistance. This and other objects will be accomplished by a pattern formin... Read More
Inventors: Ogawa, Kazufumi;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP) |
Process for the production of foams
What is claimed is: 1. In a process for the production of mold-formed foam having an impervious outer skin with self-releasing properties, said process comprising: (A) introducing a foamable reaction ... Read More
Inventors: von Bonin, Wulf; Kleimann, Helmut; Ivanyi, Jozsef;, Assignee: Bayer Aktiengesellschaft (Leverkusen, DE) |
Polyurethane foam containing internal mold-release agent
What we claim is: 1. A process for the production of polyurethane foam mouldings which comprises foaming a reaction mixture which comprises (A) an aromatic polyisocyanate containing at least two isocy... Read More
Inventors: Sparrow, David J.; Van Autgaerden, Willy;, Assignee: Imperial Chemical Industries Limited (London, GB2) |
Method of making foamed resins with internal mold-release agents
What we claim is: 1. In a process for the production of molded articles of polyurethane foam by foaming a reaction mixture in a closed mold, said reaction mixture comprising an organic polyisocyanate,... Read More
Inventors: Kleimann, Helmut; von Bonin, Wulf; Schneider, Heinz-Georg;, Assignee: Bayer Aktiengesellschaft (Leverkusen, DE) |
Internal mold release agent for use in reaction injection molding
OF THE INVENTION It has been observed that zinc carboxylates such as zinc stearate are not effective as internal release agents in conventional polyurethane RIM formulations based on polyisocyanates,... Read More
Inventors: Taylor, Ronald P.; Cekoric, Mark E.; Dewhurst, John E.; Abouzahr, Saad M.;, Assignee: Mobay Chemical Corporation (Pittsburgh, PA) |
Internal mold release compositions
OF THE INVENTION The internal mold release (IMR) composition of this invention comprises a metal salt of an organic acid and a tertiary amine compound which is a compatibilizer for the metal salt in ... Read More
Inventors: Nelson, Donald L.; Matijega, Roney J.; Miller, deceased, Dennis P.;, Assignee: The Dow Chemical Company (Midland, MI) |
Nonmetallic Processes 
