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All publications for the rubric Universities

Image 1: Particles extracted from a filter membrane during testing of an automotive component (left) and individual, critical particles (right)

Image 2: Spectrum of different automotive components

Image 3: Components of a cleanliness analysis (left) according to VDA 19 (right)

Image 4: Example of an extraction using a syringe

Image 5: Information content of different analysis methods

Figure 6: Analysis filter (top) and evaluation of a qualification study (bottom)

Figure 7: Factors influencing assembly cleanliness (left) according to VDA 19.2 (right)

Image 8: Principle of the tape lift method (left) and the collection of particles with sedimentation traps (right)

Image 9: Spectrum of different medical technology products

Image 10: Particle analysis under cleanroom conditions

Figure 11: Determination of the cleaning efficiency of cleaning procedures for subsequent comparison

Image 12: Main topics of the revision of VDA 19

Image 13: Training program for inspectors and planners for technical cleanliness

28.06.2013
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R+D & Community of Interest

Technical cleanliness: Determination of particulate purity - from the automotive industry to medical technology

1. Requirements for Particulate Purity

For integrated circuits manufactured in the semiconductor industry with feature sizes currently up to 22 nm, the high level of required particulate purity is immediately apparent. Particulate purity, meaning the absence of critical particles in the micrometer ra…

Hamilton Microlab Star in ISO 1 cleanroom at Fraunhofer IPA

Hamilton Microlab Star in ISO 1 cleanroom at Fraunhofer IPA. Image source: Fraunhofer IPA

Hamilton Microlab Star in ISO 1 cleanroom of Fraunhofer IPA during a flow visualization. Image source: Fraunhofer IPA

Hamilton Microlab Star in the ISO 1 cleanroom of Fraunhofer IPA during a flow visualization. Image source: Fraunhofer IPA

Deployed PCA sedimentation plates for measuring sedimented microorganisms in a Hamilton Microlab Star. Image source: Fraunhofer IPA

Laid-out silicon wafers for measuring sedimented particles in a Hamilton Microlab Star. Image source: Fraunhofer IPA

17.05.2013
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R+D & Community of Interest

Qualification test of a pipetting robot for sterile production

Contents:
1       Introduction
2       Derivation of necessary tests
3       Conducted Tests
3.1      Measurement of particulate air cleanliness at critical control points
3.2      Flow visualization
3.3      Media Fill simulation
3.4      Measurement of contamination risk at product level
3.4.1   Microbiological contamination risk
3.4.2 &nbs…

Clean2013-NELIOR / AAF-Air Technology GmbH

Clean2013-NELIOR-Robustness / AAF-Air Technology GmbH

mosaix_stitchedimage_particleanalyzer_1 / Carl Zeiss Microscopy GmbH

unknown_metallicparticle_particleanalyzer_2 / Carl Zeiss Microscopy GmbH

corrmic_particle_unknown / Carl Zeiss Microscopy GmbH

MAS-100 ISO NT Continuous without Petri dish / MBV AG

MAS-100 ISO NT CM with table and Petri dish / MBV AG

08.02.2013
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R+D & Community of Interest

Air filter medium, "Correlative Particle Analyzer," and a device for measuring biological air contamination impress the jury

Interdisciplinary diversity shines at the Fraunhofer Cleanliness Technology Award "CLEAN! 2013"

On the 2nd day of the Cleanroom Lounge, the moment had arrived: the three winners were awarded for their contributions with the Fraunhofer Cleanliness Technology Award »CLEAN! 2013«. The 1st prize went to »MEGAcel with NELIOR Filtration Technology« by AAF-Lufttechnik GmbH. Its air filter medium base…

Figure 1: Representation of the need for research on critical contamination parameters in the manufacturing industries operating under cleanroom conditions [2].

Image 2: Overview of markets that rely on purity in production [3].

Image 3: Overview of critical contaminations on product surfaces.

Figure 4: REM image of a surface with a mixed contamination (film and particulate).

Figure 5: Procedure for validating the purity status of products.

Figure 6: Overview of possible analysis methods.

Figure 7: Critical particle sizes for functional components and systems [6].

Image 8: Damaged connecting rod (left) and cylinder (right). The cause of failure was a continuous injection caused by a particle in the size range of a few micrometers.

Image 9: Cleanliness analysis according to VDA 19: Overview of the procedures [7].

Image 10: Cleanliness values of a decay measurement.

Image 11: SEM image of contamination on a filter membrane.

Figure 12: Quantitative results of the cleanliness analysis of a medical device.

Figure 13: Procedure for cleaning validation.

Figure 14: Setting a threshold value for the microscopic analysis of an automated particle count.

Image 15: CO2 snow cleaning (left), integrated into a cleanroom at ESTEC, Noordwijk (right).

Figure 16: Cleaning efficiency of the CO₂ snow jet cleaning process for particles on a selected surface

20.12.2012
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R+D & Community of Interest

Purity validation of contamination-critical products

In a variety of innovative products, contamination control plays a crucial role. Despite the use of state-of-the-art cleanroom technology, critical contaminations in mass production cannot be completely ruled out. Therefore, the purity of contamination-critical products must be continuously monitore…

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