Graphical based characterisation and modelling of material gradients in porosified LTCC
Steinhäußer F, Talai A, Steiger-Thirsfeld A, Kölpin A, Weigel R, Bittner A, Schmid U (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Publisher: Elsevier
City/Town: China
Book Volume: 34
Pages Range: 2833-2838
Journal Issue: 11
DOI: 10.1016/j.jeurceramsoc.2014.01.021
Abstract
The chemical composition of LTCC (low temperature cofired ceramics) allows the local implementation of air into the sintered substrates by a selective wet chemical etch process. Therefore, LTCC substrates with areas of low as well as of high permittivity can be created without a material combination. The presented graphical method of material component contrast images enables the evaluation of the most important material properties after their local porosification which are their component distribution, their porosification gradient and their residual bearing surface. The graphical method, including focused ion beam and scanning electron microscopy analyses, is applied to different commercially available LTCC types having two porosification states each. The derived mathematical models, suitable for finite element method implementation, allow the characterization of the effective permittivity reduction while keeping a maximum residual surface area for e.g. metallization purposes. The shape of the optimum material distribution function features an ‘air pocket’ of small width and a depth being dependent on the application specific operating frequency.
Authors with CRIS profile
Armin Talai
Lehrstuhl für Technische Elektronik
Alexander Kölpin
Lehrstuhl für Technische Elektronik
Robert Weigel
Lehrstuhl für Technische Elektronik
Involved external institutions
Austria (AT)How to cite
APA:
Steinhäußer, F., Talai, A., Steiger-Thirsfeld, A., Kölpin, A., Weigel, R., Bittner, A., & Schmid, U. (2013). Graphical based characterisation and modelling of material gradients in porosified LTCC. Journal of the European Ceramic Society, 34(11), 2833-2838. https://dx.doi.org/10.1016/j.jeurceramsoc.2014.01.021
MLA:
Steinhäußer, Frank, et al. "Graphical based characterisation and modelling of material gradients in porosified LTCC." Journal of the European Ceramic Society 34.11 (2013): 2833-2838.
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