Georgia Tech Research Corporation

Promerus, Lcc

Superconductor Technologies Inc.

Paul Albert Kohl

Clifford Lee Henderson

Hollie K Reed

Paul Jayachandran Joseph

James D Meindl

Thomas K Gaylord

Muhannad S Bakir

Sue Ann Bidstrup-Allen

Sue Ann Bidstrup Allen

Elias N Glytsis

Kevin P Martin

Jared Schwartz

Gerald Gourdin

Jisu Jiang

Celesta E White

Oluwadamilola Phillips

Anthony Engler

Farrokh Ayazi

Chirag Suryakant Patel

Stephen M Schultz

Jun Li

Tony Mule′

Tony Mule&prime;

Mrinmay Mandal

Larry Funderburk Rhodes

Qiang Zhao

Doug Skilskyj

Timothy J Drabik

Murat Unlu

Matthew L Barchok

Yu-Chun Chen

Xiaoqun Wu

Jurgen Musolf

Dhananjay M Bhusari

Eric K Propst

Junfeng Zhou

SueAnn Bidstrup Allen

Hyea Kim

Mina Raieszadeh

Hiren D Thacker

Agnes M Padovani

Irene Anestis-Richard

Rajarshi Saha

Nathan Fritz

Sue Ann B Allen

Ricardo Villalaz

Brennen Karl Mueller

Kirkland W Vogt

Christopher W Moore

Garrett Huang

Ate He

Mark Cupta

Todd Spencer

Embodiments in accordance with the present invention encompass a variety of polymers derived from polycyclic olefin monomers, such as hydrocarbon functionalized norbornenes. The polymers so formed function as ionomers and are suitable as anion exchange membrane for fabricating a variety of electrochemical devices, among others. More specifically, the ionomeric polymers used herein are derived from a variety of quaternized amino functionalized norbornene monomers and are lightly crosslinked (less than ten mol %). The membranes made therefrom exhibit very high ionic conductivity of up to 198 mS/cm at 80° C. This invention also relates to using an anion conducting solid polymer electrolyte as the ion conducting medium between the two electrodes and the ion conducting medium within the electrodes acting as the ionic conduit between electroactive material and electrolyte. The electrochemical devices made in accordance of this invention are useful as fuel cells, gas separators, and the like.

Polycyloolefinic polymers and anion exchange membranes derived therefrom

Embodiments of the present disclosure provide for transient adhesive polymers, methods of making transient adhesive polymers, structures including the transient adhesive polymer attaching two portions of the structure to one another, and the like.

Transient adhesives, methods of making, and methods of use

The invention relates to an anion-exchange membrane (AEM) having a multiblock copolymer including a hydrophilic norbornene-based monomer and a hydrophobic alkene-based or norbornene-based monomer. The hydrophilic norbornene-based monomers include one or more cationic head groups such as a quaternary ammonium ion, which can optionally be crosslinked with a crosslinking agent to increase the structural stability of the polymer. These AEMs can be employed in electrochemical devices such as fuel cells.

Anion-exchange membranes and methods of making and using the same

Self-immolative polymers and compositions comprising such polymers are described. The polymers are copolymers of phthalaldehyde and one or more additional aldehydes and can degrade/decompose upon exposure to a desired stimulus, like light, heat, sound, or chemical trigger. The copolymers can be linear or cyclic, and can be crosslinked or uncrosslinked. Polymer compositions, including multilayered and multiregioned compositions, containing the copolymers are disclosed. These compositions can contain agents such as crosslinking agents, crosslinking catalysts, photocatalysts, thermocatalyst, sensitizers, chemical amplifiers, freezing point depressing agent, photo-response delaying agents, and the like. Methods of making and using the copolymers are also described.

Self-immolative polymers, articles thereof, and methods of making and using same

In microelectronic applications, it is often desired to deposit and pattern a permanent dielectric film in order to electrically and mechanically isolate components. Photo-patternable dielectrics are attractive for these uses because of their reduced time and cost requirements. These permanent dielectrics should be high-speed, positive-tone, and aqueous-developable. This type of patternability may be achieved by using a chemically amplified deprotection reaction of tert-butoxycarbonate or tert-butyl acrylate catalyzed by a photo-inducible acid. Provided herein are: a composition for preparing a dielectric film comprising a polymer mixture, wherein the polymer mixture comprises a base polymer comprising a pendent protected organic functionality, a photocatalyst for deprotecting the protected organic functionality and a chemical cross-linker for cross-linking the dielectric film after a photo-patterning has taken place in an aqueous solution; a dielectric film prepared from said composition; and method of preparing a dielectric film.

Positive-tone, chemically amplified, aqueous-developable, permanent dielectric

Provided according to some embodiments of the invention are anion exchange polyelectrolytes that include an at least partially fluorinated polyaromatic polymer backbone; and at least one cationic functional group pendant therefrom. Also provided are anion exchange membranes (AEMs) formed from at least one anion exchange polyelectrolyte according to an embodiment of the invention, and fuel cells including such AEMs.

Anion exchange polyelectrolytes

Embodiments according to the present invention relate generally to PAG bilayer and PAG-doped unilayer structures using sacrificial polymer layers that incorporate a photoacid generator having a concentration gradient therein. Said PAG concentration being higher in a upper portion of such structures than in a lower portion thereof. Embodiments according to the present invention also relate to a method of using such bilayers and unilayers to form microelectronic structures having a three-dimensional space, and methods of decomposition of the sacrificial polymer within the aforementioned layers.

Photosensitive sacrificial polymer with low residue

Polymers, methods of use thereof, and methods of decomposition thereof, are provided. One exemplary polymer, among others, includes, a photodefinable polymer having a sacrificial polymer and a photoinitiator.

Polymers, methods of use thereof, and methods of decomposition thereof

A fuel cell () includes a cation exchange membrane (), a first anion exchange membrane () and a second anion exchange membrane (). The cation exchange membrane () has a first side and an opposite second side. The first anion exchange membrane () has a first exterior surface and an opposite first interior surface disposed along at least a portion to the first side of the cation exchange membrane (). A catalyst () is embedded along the first exterior surface. The second anion exchange membrane () has a second exterior surface and an opposite second interior surface disposed along at least a portion to the second side of the cation exchange membrane (). A catalyst () is embedded along the second exterior surface. A stack of fuel cells () include a first fuel cell () with an acidic first anode () that is electrically coupled to an alkaline second cathode () of a second fuel cell ().

Electrochemical devices based on multiple junction ionic conductive membranes

This invention discloses and claims a cost-effective, wafer-level package process for microelectromechanical devices (MEMS). Specifically, the movable part of MEMS device is encapsulated and protected while in wafer form so that commodity, lead-frame packaging can be used. An overcoat polymer, such as, epoxycyclohexyl polyhedral oligomeric silsesquioxanes (EPOSS) has been used as a mask material to pattern the sacrificial polymer as well as overcoat the air-cavity. The resulting air-cavities are clean, debris-free, and robust. The cavities have substantial strength to withstand molding pressures during lead-frame packaging of the MEMS devices. A wide range of cavities from 20 &#x3bc;m&#xd7;400 &#x3bc;m to 300 &#x3bc;m&#xd7;400 &#x3bc;m have been fabricated and shown to be mechanically stable. These could potentially house MEMS devices over a wide range of sizes. The strength of the cavities has been investigated using nano-indentation and modeled using analytical and finite element techniques. Capacitive resonators packaged using this protocol have shown clean sensing electrodes and good functionality.

Packaging compatible wafer level capping of MEMS devices

Microstructures and methods of fabricating microstructures are disclosed. One exemplary microstructure, among others, includes a substrate, an overcoat layer disposed upon the substrate, an air-region within at least a portion of the overcoat layer, and a framing material layer engaging at least a portion of the air-region on the inside of the framing material layer and engaging the overcoat layer on the outside of the framing material layer.

Microstructures and methods of fabrication thereof

Growing community of inventors

Atlanta, GA, United States of America

Paul Albert Kohl