Regulations are indispensable in cleanliness technology. They specify which cleanliness standards, test methods or threshold values must be observed for particular industries. Fraunhofer IPA is on committees all over the world and helps to shape groundbreaking guidelines. At the Cleanzone and Lounges on Tour trade fairs in Frankfurt am Main on October 17-18, Fraunhofer scientists will give information on new developments such as the expansion of the VDI 2083 set of guidelines to include nanoscale contamination and a calculation method to determine the degradation kinetics of hydrogen peroxide and the desorption kinetics of materials after hydrogen peroxide fogging.
Dr. Udo Gommel, Head of the Department of Ultraclean Technology and Micromanufacturing, is responsible for the establishment of cleanroom and cleanliness technology regulations on several committees and in industry networks. He is Chairman of the VDI Expert Committee on Cleanroom Technology, which is made up mostly of industry representatives, and meets with the committee at least twice a year in order to examine over 20 guidelines on cleanroom technology (VDI 2083), modify them where appropriate and align them with the international ISO equivalents.
Basic standard for nanoscale particle contamination expanded
At previous meetings, the VDI Expert Committee on Cleanroom Technology determined the need for cleanrooms and cleanliness-technology-controlled areas to expand into ranges below 0.1 micrometers into the single-digit nanoscale range. The reason for this is that line widths are becoming ever smaller in the semiconductor and nanotechnology sectors.
“Smaller and smaller components are required to produce microchips. Consequently, the size at which particle contamination must be controlled is also decreasing”, Dr. Gommel explains. VDI 2083/1, which the experts refer to as the “mothership” of VDI standards on cleanroom technology, covers particle sizes of 0.1 to 5.0 micrometers. The new forthcoming standard VDI 2081/1.1 relates to much smaller contaminants in the range of 5-100 nanometers.
The VDI Expert Committee created a new classification system for this that specifies threshold values for compliance with product and process-specific specifications. Measuring techniques and procedures for characterizing clean areas and equipment were also determined. The new guidelines are to be adopted at the end of this year. Dr. Gommel will present the new developments in his lectures at Cleanzone and Lounges on Tour on October 18.
New calculation method determines the desorption time of H2O2
Another subject that the VDI Expert Committee on Cleanroom Technology took on is desorption kinetics, more specifically the degradation of hydrogen peroxide (H2O2) after applying it to surfaces in cleanliness-technology-controlled areas. To ensure that there is no contamination of pharmaceutical or medical technology products and surfaces where cleanliness is critical, for example in manufacturing tablets or implants, cleanrooms must be sterilized overnight.
This is often done by hydrogen peroxide fogging, which kills off microorganisms. However, increased concentrations of H2O2 are harmful to humans and should not be inhaled, so cleanrooms are ventilated after sterilization until the H2O2 level has decreased to a non-critical value. In spite of this, the gas adheres to surfaces, meaning that degradation slows down and this delays the resumption of production activities in the cleanroom.
For this reason, Fraunhofer IPA developed a procedure that can be used to determine the half-life of H2O2 degradation. Dr. Gommel: “This means that users know when they can resume production.” The new calculation algorithm was integrated into VDI guideline 2083/20. On October 18, Fraunhofer IPA expert Dr. Markus Keller will present the procedure to the public at Cleanzone.
From pure ambient air assessment to specific contaminants
Fraunhofer IPA also works with committees and industry networks to harmonize the various guidelines on cleanroom and cleanliness technology. In addition to the VDI 2083 set of guidelines, the international set of standards ISO 14644 and the European Cooperation for Space Standardization (ECSS) for the aviation and aerospace sectors also apply to cleanroom workers. For airborne contaminants, a trend can be seen: cleanroom environments are no longer just being assessed as a means to an end, with the products and their specific cleanliness requirements becoming ever more important.
Dr. Gommel: “Previously, standards only focused on air purity, whereas now users can receive concrete guidelines on the requirements for surface cleanliness, component specifications or production environment qualities. This applies to particulate, chemical, film-type and microbiological aspects that are required for production processes, such as for manufacturing satellites, car components or even implants.” Dr. Gommel will explain this topic in more detail at Lounges on Tour on 18 October.
Details of lectures
When: October 17-18, 2017
Where: Frankfurt am Main, Messe Frankfurt
9:15am to 9:40am: »VDI 2083/1.1 Nanoscale contamination – classification and measurement« (Speaker: Dr. Udo Gommel, Fraunhofer IPA)
10:15am to 10:40am: »VDI 2083/20 Determining the desorption kinetics of substances after fogging« (Speaker: Dr. Markus Keller, Fraunhofer IPA)
2. Lounges on Tour:
When: October 17-18, 2017
Where: Frankfurt am Main, The Squaire, Frankfurt Airport
11:30am to 12:00pm: »Development of standards (ISO, VDI, ECSS) – ACC influence on product environment and process suitability of consumables« (Speaker: Dr. Udo Gommel, Fraunhofer IPA)
Ramona Hönl | Telefon +49 711 970-1638 | firstname.lastname@example.org
Dr. Udo Gommel | Telefon +49 711 970-1633 | email@example.com
Jörg Walz | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
Innovative Infrared heat reduces energy consumption in coating packaging for food
12.12.2018 | Heraeus Noblelight GmbH
Mobile learning, artificial intelligence and digital training formats in science and research
04.12.2018 | time4you GmbH
Researchers from the University of Basel have reported a new method that allows the physical state of just a few atoms or molecules within a network to be controlled. It is based on the spontaneous self-organization of molecules into extensive networks with pores about one nanometer in size. In the journal ‘small’, the physicists reported on their investigations, which could be of particular importance for the development of new storage devices.
Around the world, researchers are attempting to shrink data storage devices to achieve as large a storage capacity in as small a space as possible. In almost...
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
18.12.2018 | Materials Sciences
18.12.2018 | Physics and Astronomy
18.12.2018 | Physics and Astronomy