Expert in Polymer Chemistry, Thermoset Polyimides, Epoxies, Cyanate Esters, BMIs, Ultrahigh Temp Polymers
Expert ID: 726231 California, USA
He began his professional career in the aerospace industry and has comtributed to the development of thermoset polyimides as the resin materials for high temperature carbon fiber reinforced composites. He gained his expertise in solvent and hot-melt prepregging and contributed to improving processibility of thermoset polyimide systems.
He is expert in physical and chemical characterization of polymers and composite materials, adhesion failures, and prepregging defects. He is expert in interpreting thermal analytical results (DSC, TGA, DMA) and other analytical characterization techniques including NMR, FTIR, MS, GCMS, and HPLC. Although not a trained mechanical engineer, he has many years of working knowledge in thermomechanical testing, ASTM instron testing methods, and failure inspection of composite test specimens.
During the years with the semiconductor industry, he has developed a second generation high temperature thermoset aromatic system for applications as low-k dielectric interlayer materials based on the chemistry of highly-phenylated adamantanes and Diels Alder reaction of tetracyclone and phenylacetylene. He also worked on the synthesis of highly phenylated terphenyl systems based on Diels-Alder reactions of the appropriate structures.
He has more than 2 decades' experience in new product development of high-performance polymers for applications in harsh environmental conditions and high temeprature regimes. Polymer systems included the cyanate esters, bismaleimides, thermoset polyimides, polyarylene ethers, polyphenylenes, and polybenzimidazoles and polybenzoxazoles.
His experience with high temperature adhesives was mainly with thermosetting polyimides for aerospace structural applications.
He has worked on high temperature composites for high speed aircraft applications, and was mainly in thermoset polyimides and their isoimide modifications.
His work on polyimides and polyarylene ethers are AB-type homopolymers
He has worked on organic coatings with dielectric properties for the aerospace and semiconductor industries, where the coatings in the latter are thin films. The polymer types are mainly polyimides, epoxies, and poly(arylene ethers). A few of these developmental programs turned into practical systems for coating select classified structures (aerospace industry) and commercializing one of the world's earliest organic low-k dielectric thin films.
Polyamic acid is the more processible form of polyimide. Many solvent prepregs used for fabricating polyimide composites are the polyamic acid intermediates. In addition, he also studied and applied the polyisoimide alternative to circumvent the outgassing problems in processing polyimide through the amic acid stage.
He has more than 20 years of experience working with the synthesis, characterization, and applications of different types of polymer systems for both the aerospace ans semiconductor industries.
He has over 20 years of expertise in polymer chemistry, including design, synthesis, characterization, and sturcture-property relationship studies.
He has extensive experience in polymer modification by monomer substitution, reactions on polymers, curative applications as in the case of epoxy chemistry.
He has extensive synthetic expertise in polyimides, monomer design, nucleophilic aromatic substitution, Diels-Alder synthesis.
He has consulted on-site in the Bay Area for a technology company designing multilayer thin films and served partially also as patent reader and writerHe has consulted on-site in Ohio for a materials technology company and performed hands-on lab work in polymer chemistry on chemical synthesis and process development of photoimageable polymers.He has consulted on-site for a start-up company in the Bay Area in epoxy chemistry and process development for microelectronic packaging.He has served as off-site (via emails and telephone) technical consultant for a Bay Area optical equipment R&D company on chemistry-related questions on materials selection and surface chemistry.He has a retained contract with a biopharmaceutical company in the Bay Area, for technical translations between Chinese and English and quality control in translated documents.
|Year: 1976||Degree: Ph D||Subject: Organic Chemistry||Institution: University of Iowa|
|Years: 2008 to Present||Employer: Undisclosed||Title: R&D Chemist-Technical Manager||Department: R&D|
Responsibilities:He is responsible for R&D product development and property improvement per customer requests. Concurrently, he serves an as internal consultant to Manufacturing
|Years: 2001 to Present||Employer: Undisclosed||Title: Technology consultant||Department:|
Responsibilities:Expert has served as consultant and has assisted several companies during this performance period on materials and polymer chemistry, surface chemistry, adhesives and coatings, product and process development. He has also involved in technical translation between Chinese and English.
|Years: 2007 to 2008||Employer: YLA, Inc.||Title: R&D Technical Manager||Department: R&D|
Responsibilities:He manages daily lab operations, conducts R&D on product line improvement and new product development, provides technical service to aerospace customers, and directs chemical characterization and analysis.
|Years: 2002 to 2004||Employer: Ciphergen Biosystems, Inc.||Title: Senior Process Chemist||Department: Consumables|
Responsibilities:His assignment was process development of next generation protein chip design and development of a modular manufacturing process.
|Years: 1994 to 2001||Employer: AlliedSignal Advanced Microelectronic Materials, Inc.||Title: Senior Chemist and Materials Technology Leader||Department: R&D|
Responsibilities:He directed the R&D development of organic low-k dielectric polymers from conceptualization to commercialization, designed experimentations, and interacted iteratively with Tier 1 semiconductor industry customers during the developmnet cycle.
|Years: 1987 to 1994||Employer: Lockheed Aeronautical Systems & Missiles & Space Companies||Title: Senior Staff Scientist||Department: Advanced Technology Center|
Responsibilities:He served as polymer chemistry expert in the development of CFR polyimide composites, wrote contract proposals, and directed funded programs in the aerospace materials technology arena.
|Years: 1979 to 1987||Employer: Hughes Aircraft Company||Title: Senior staff engineer, group leader||Department: Technology Support Division|
Responsibilities:His main responsibilities included new product development in epoxy and polyimide chemistries, technical interface with customers, and proposal preparation to secure contractual funding for the division of Hughes Aircraft Company.
|Years: 1980 to 1994||Agency: US Air Force||Role: principal investigator||Description: He was the PI of multiple government contracts for Hughes and Lockheed on polyimide technology and advanced materials for composites|
|Years: 1983 to 1987||Agency: ONR||Role: Principal Investigator||Description: He succesfully won and performed on materials programs from ONR on high temp adhesive development during his years with Hughes Aircraft Company from 1978 to 1987.|
|Years: 1980 to 1994||Agency: NASA Langley||Role: technical liaison||Description: He served as the technical laison between company (Hughes and Lockheed) and the agency on technical interactions|
|Years||Country / Region||Summary|
|Years: 1994 to 2001||Country / Region: Japan||Summary: He has worked on-site at customer facilities mainly between Tokyo and Nagoya on scheduled visits and performed technical trouble-shooting.|
|Years: 1994 to 2001||Country / Region: Germany||Summary: He conducted technology transfer to an AlliedSignal-Honeywell corporate manufacturing facility in Seelze, Germany, and supported international tradeshows in Munich, Germany, during his time with the semiconductor industry from 1994 to 2001.|
|Years: 2002 to 2002||Country / Region: Taiwan, Republic of China||Summary: He was an invited speaker at ITRI, Hsinchu, Taiwan on chemical technologies.|
|Years: 2002 to 2002||Country / Region: Singapore||Summary: He was an invited speaker on organic dieletric polymers at IME in Singapore.|
|Associations / Societies|
|American Chemical Society|
|Awards / Recognition|
|Multiple Patent Awards from Hughes, and AlliedSignal-Honeywell, AlliedSignal; Employee of the Year Award from AlliedSignal|
|Publications and Patents Summary|
|Expert has contributed more than 40 professional journal publications in organic chemistry, polymer composites, and semiconductor materials. He also has contributed 4 book chapters on polyimide chemistry, and adhesion science. To date, he is the author of over 65 patents on polymer materials design and processes.|
|Expert Witness Experience|
|Expert has served in a limited capacity as expert witness as a consultant to technical details in patent prosecution|
|Training / Seminars|
|As part of his professional responsibilities, Expert has given seminars and technical presentation on technical topics, including chemical technologies and dielectric materials processing and characterization.|
|Expert has been a technical R&D professional for several companies in different industries. Typically as project leader, he was responsible for interacting with suppliers and materials vendors to establish relevant links of enabling technologies for the company products. He often visited vendors on site to evaluate manufacturing facilities and operational procedures.|
|Expert has informally gained working knowledge on market trends, emerging technologies, key players, and company atttitudes while serving in technical capacities to assist marketing personnel in customer visits and vendor accessment tours.|
|Other Relevant Experience|
|In addition to technical consulting as an experienced polymer chemist in epoxy and polyimide chemistries and other high temperature polymers, Expert has also occasionally assisted clients in technical translations from French and German. He has more frequently helped in translations between Chinese and English, in both directions.|
|Chinese||Expert is a native speaker of Chinese and knows the language at the literary level.|
Fields of Expertise
aromatic polymer, composite material, composite material characterization, Diels-Alder reaction, high-performance polymer, high-temperature adhesive, high-temperature composite, homopolymer, organic coating material, polyamic acid, polymer, polymer chemistry, polymer modification chemistry, synthetic polymer chemistry, adhesive manufacturing, inorganic material selection, flooring adhesive, semiconductor industry chemical, photoresist chemical, microelectronic chemical, peel strength, composite material selection, asphalt coating material, composite material testing, flame-retardant adhesive, amorphous polymer, physical organic chemistry, melt flow, adhesion science, thermosetting adhesive formulation, adhesive application machine, organic coating defect, advanced composite processing, adhesive dispensing equipment, composite material mechanical property, adhesive application process, adhesive formulation technology, polyamide synthesis, advanced composite, adhesive material film, glassy polymer, inorganic polymer chemistry, adhesive application, adhesive formulation, polyurethane chemistry, polymer science, organic coating process, organic semiconductor material, fire-retardant polymer additive, adhesive tape-coating material, adhesive failure analysis, adhesive selection, adhesive material, plastic material, composite material failure, adhesive failure, addition polymer, semiconductor chip, polysilicone chemistry, fluoropolymer, copolymer, semiconductor material, semiconductor glass, polymer physical chemistry, polymer additive, polyacrylate, material substitution process, inorganic polymer, composite material processing, adhesive cement, adhesive wear, adhesive testing, adhesive removal