Development of Safe, Validated and Economical Cleaning Process Based on Optimised Wiping Processes in Combination with the Application of Carbon Dioxide Snow for Surfaces in Clean Rooms
AiF 14194 N
In medical fields, the electronic and semiconductor industry, pharmaceutical industry, gene technology and other fields, a lot of production processes must be carried out under very demanding clean room conditions. Due to the increasing amount of sensitive products and procedures, the limits for the particle content and acceptable particle sizes decreased during the last years. This trend will continue in the future. Against this background there are increasing inquiries regarding clean room cleaning. Concerning professional clean room cleaning, no systematic scientific investigations have been available yet. This is the reason why current standards (for example VDI 2083-4 and ISO 14644-5) do comprise only little demands concerning this subject.
The VDI 2083-4 defines “particulate surface cleanliness”, but points out, that there is no correlation between the air cleanliness and the particulate surface cleanliness. For the use of cleaning wipes, the guideline gives some recommendations based on empirical rankings, however, there are no published scientific investigations concerning the suitability of clean room wipes. Within the research project a safe, validated and economical cleaning process based on optimised wiping processes in combination with the application of carbon dioxide snow for surfaces in clean rooms was provided. The results were be summarized in a functional matrix. This allows an optimum adjustment of a clean room cleaning method to a specific cleaning problem.
We thank the Arbeitsgemeinschaft industrieller Forschungvereinigungen e.V. (AiF) (Association of Industrial Research Organisations) for funding the project AiF 14194 N through a financial support by the Federal Ministry of Economic Affairs.
The research report is available on request from FRT.