Low-Pressure Plasma Technology Treats Sensors in Cleanroom Environment
Diener electronic cleans sensors made of polypropylene with low-pressure plasma. To guarantee the conductivity and adhesive properties of sensors for implants—sensors made of polyamide 6 with a fibreglass piece and head of galvanised nickel-gold with a razor-thin layer of bond gold, for example—the components are treated with plasma inside a Class 8 cleanroom. The advantage of low-pressure plasma is that the treated items warm up only slightly. When activating synthetic materials made of polypropylene, the heating is hardly measureable. Diener’s Tetra 50 system is equipped with a rotary drum with holes. The parts are put into the rotary drum as loose material; the rotation ensures that the parts are treated equally on all sides.
During plasma treatment, energy is continuously fed to the material as its temperature increases, converting it from a solid to a liquid and into a gas. If the energy continues to flow, the existing atomic shells break up and this results in charged particles—negatively charged electrons and positively charged ions. The plasma mixture removes organic layers from the sensors during the process.
Diener electronic GmbH + Co. KG
Ebhausen, Germany +49 7458 999 310
Demand for coated and modified surfaces is rising and extending to new areas, from immunoassays to drug discovery, driven by the need to bind proteins, DNA fragments and cells while maintaining functional properties. Engineering company Biomat focuses on special products and surface modifications for biomedical applications targeting the IVD market. The company provides surface modifications by means of plasma and chemistry, and offers biological coating services. Biomat also produces microplates and other articles for immunoassays, drug discovery and research applications.
Rovereto, Italy +39 0 464 443 320
Plasma Etch has introduced a benchtop plasma cleaner. The smallest plasma cleaner in the company’s product line, the PE-25-jw is equipped with a PLC system and comes with a standard single or optional dual gas channel. The plasma cleaner features automatic process sequencing capabilities. All timed events such as pump down, gas stabilisation and venting can be easily programmed into the automatic sequence. The PLC keypad is used for operator entry and one complete process recipe can be stored in memory for repeatable results. One button operation starts the process sequence. Suitable for plasma sterilisation and surface modification, the PE-25-jw is designed for smaller production facilities, research and development labs, testing facilities and universities.
Plasma Etch Inc.
Carson City, NV, USA +1 775 883 1336
Corona treating system
3DT manufactures a full line of surface treatment equipment designed to improve the adhesion of difficult-to-bond materials in 2- and 3-D applications. The company’s 3DT TubeDyne Corona Treating system is designed to process the outer diameters of tube ends. Non- and semiconductive tubing measuring up to 0.25 in. diam placed in the holding fixture will receive a uniform corona treatment along a length of approximately 2 in.
Germantown, WI, USA +1 262 253 6700
Contract services to impart a range of surface characteristics on plastic components via gas plasma surface treatment and PECVD coatings are available from Plasmatech Inc. Unlike conventional plasma surface treatments that often have shelf-life limitations, polymerised thin-film coatings can provide permanent surface enhancement. The thickness of the coating typically measures less than one micron.
Erlanger, KY, USA +1 859 647 0730