Para Tech - Parylene Applications

		PARYLENE superior protection for electronics

*What is Parylene?* *Parylene data* *Where is Para Tech?* *Contact us* *About ParaTech* *Brochures* *Mainpage*		Background Para Tech Coating Inc. of Aliso Viejo, Ca, U.S.A. is a company providing the U.S. market with a high quality protective coating process for electronic, electrical and other sensitive productsknown as Parylene. The coating process is developed by Para Tech. The process equipment is also developed, manufactured and marketed by Para Tech. Para Tech is now working to expand their operations into Europe and in exploring their various options they have made contacts with HP Etch AB, Järfälla, Sweden. HP Etch's business is in high precision etching of metallic materials. ln this capacity it has been working with Parylene as the protective coating while developing the manufacturing process on a high tech customer product. The company has its main customer base in the electronics and printed circuit card assembly industry areas. Both companies see major advantages in co-operation on this arena and have therefor decided to establish a joint business venture for parylene coating in Sweden. The new company will be registered as Para Tech Coating Scandinavia AB and located in Järfälla, Sweden. Para Tech Coating, lnc. U.S.A. will own 60% of the new company and HP Etch AB will own 40% thereof. Parylene History "It is well known that huge investments made in technology during the exciting days of space exploration in the late 1960s through the 1970s led to unprecedented breakthroughs in many scientific and ancillary areas. One of the latter was the use of a thin, vacuum-deposited polymer known as Parylene to protect electronics assemblies and other components from the rigors of operation beyond the earth's atmosphere. Parylene actually was not a new discovery. The film had been isolated and qualified in the late 1940s by Michael Mojzesz, a research chemist at the University of Manchester in England. For a time, Parylene remained a technical curiosity without useful application. Then, five years after its identification, William Franklin Gorham, a Union Carbide Corp. scientist, expanded on the findings of Mojzesz and eventually proposed an industrial vapor-deposition process to produce Parylene film. In February 1965, Union Carbide announced the commercial availability of the new polymeric coating together with a unique vacuum method for film application. By late 1965, more than 50 industrial firms had submitted orders for Parylene testing to assess its performance on such diverse substrates as thermistor devices, film resistors, photocells, transformer foil insulation and satellite micrometeoroid-detector panels." Parylene is considered by many as the ultimate conformal coatings for protection of sensitive devices and components from adverse environments such as moisture, salt spray, dust, fungus, corrosive vapors and liquids. It has high electric strength and volume resistivity and low dissipation factor and dielectric constant. The dielectric constant is practically insensitive to increased frequency. The surface is very lubricious and at the same time exhibits excellent resistance to wear and abrasion. Its melting temperature is very high (in range of 300°C) and it provides good thermal conductivity. It is also compatible with body tissues. Parylene provides a very thin, transparent protective polymer layer that is pinhole free, uniform and conformal. It is successfully used in many electronic and electrical applications, optical devices, radiography equipment, displays, biomedical devices and instruments, etcetera. The Scandinavian marketplace is abundant with candidate applications in these fields. Technology Parylene is the commercial name for a unique product family: poly-para-xylylene. The most commonly used member of the family is Parylene C, a linear crystalline material. The other commercially available members are Parylene N and Parylene D which originate from the same original monomer, with only minor modifications. The deposition process is not line-of-site and since all sides of the substrate are uniformly impinged by the gaseous monomer, the final polymeric layer deposits as a true conformal coating. Parylene can be deposited in very thin layers from 0,1-50 µm. The deposition process requires a special machine and consists of three steps. Sublimation under vacuum at approx. 140°C of the stable crystalline dimer di-p-xylylene to produce vapors of this material. Pyrolysis of the vapors at approx. 650°C to form gaseous reactive monomer para-xylylene. Depositions and simultaneous polymerization to form poly-p-xylylene or Parylene. The monomer enters the deposition chamber where it polymerizes under vacuum at room temperature on the surface of the component intended to be coated. Other business performed by the owners Para Tech Coating, USA is currently working in the same field of expertise as will the Swedish company. There are no plans at this point in time to diversify its business. HP Etch has its business in etching of thin metallic materials. Typical products are print bands for the computer industry, solder paste stencils for printed card assembly and miscellaneous small metal parts manufacturing. Our range of products to be marketed are various standard and custom built machines used to coat products with Parylene. Part of product sales is also the dimer which is the consumable material used for coating. Parylene coating services will be offered to customers in several fields of industry as mentioned above. This will include regular manufacturing conditions as well as support to customers in their research and product development activities. Development potential Parylene coating exhibits excellent characteristics in electrical and thermal insulation and adherence to a wide variety of substrate materials. It is optically clear, a good dry film lubricant, compatible with human tissue and has several more characteristics which makes it very competitive where sensitive devices and components need to be protected for a variety of technical and environmental reasons. Our vision is to become a recognized and preferred supplier of parylene coating services as well as machines, equipment and raw material used for parylene coating with a strong customer base throughout Europe.
*Mainpage*

E-mail: info@paratech.nu