Candidate for young scientist award - UV-curable polyimide/layered silicate barrier films
Within the iRel40 project, Fraunhofer IFAM is working on advanced functional materials and interfaces. One of the main parts in this work package is the research and development of an alternative packaging and protection concept. Together with mold materials, which among other things act as pollutant gas scavengers, the barrier coating developed, makes a decisive contribution to increasing the reliability of electronic components.
Figure 1: Test board without (left) and with polyimide/layered silicate coating (right) .
Polyimide / layered silicate films can be used to protect semiconductor chips against gas and moisture permeation to prevent corrosion followed by failure of the electronic chip. The layered silicates in these films are used as barrier pigments to extend the diffusion pathway and to improve the barrier properties. Films prepared from polyimide matrix with layered silicates were investigated as well as the distribution and orientation of silicate particles in the UV-cured film and the correlative mechanisms while hardening [1,2].
The prepared films using polyimide / layered silicates nanocomposites showed a reduction of water vapour diffusion and oxygen permeation of 30 % and 80 %, respectively. Results demonstrated that polyimide/layered silicate nanocomposites could be used as barrier coatings to reduce the permeation of moisture and gases.
Figure 2: Water vapour (left) and oxygen (right) permeation coefficients of uncoated and with barrier film applicated PET foil .
We are happy to share, that Joshua Lommes, a doctoral student from iRel40 partner Fraunhofer IFAM, has been nominated for the journal Paint and Coatings annual prize to young scientists for outstanding publications. We are keeping our fingers crossed for Joshua to win this award.
Link to the journal competition:
 Lommes J., Patzelt G., Stenzel V.; UV-curable polyimide/layered silicate films with improved barrier properties for the protection of semiconductor chips; (2023); Microelectronic Engineering; DOI: 10.1016/j.mee.2023.112014; Elsevier
 Lommes J., Zugang verboten!; (2022); Farbe und Lack; 09/2022; Vincentz
Barrier coating, layered silicates, ion exchange, reliability, lifetime, permeation, protection