The Realization of Redistribution Layers for FOWLP by Inkjet Printing

The Realization of Redistribution Layers for FOWLP by Inkjet Printing

Roshanghias, Ali;Ma, Ying;Dreissigacker, Marc ;Braun, Tanja ;Bretthauer, Christian;Becker, Karl-F. ;Schneider-Ramelow, Martin ;
proceedings 2018 Vol. 2 pp. 703-
171
roshanghias2018btheproceedings

Abstract

The implementation of additive manufacturing technology (e.g., digital printing) to the electronic packaging segment has recently received increasing attention. In almost all types of Fan-out wafer level packaging (FOWLP), redistribution layers (RDLs) are formed by a combination of photolithography, sputtering and plating process. Alternatively, in this study, inkjet-printed RDLs were introduced for FOWLP. In contrast to a subtractive method (e.g., photolithography), additive manufacturing techniques allow depositing the material only where it is desired. In the current study, RDL structures for different embedded modules were realized by inkjet printing and further characterized by electrical examinations. It was proposed that a digital printing process can be a more efficient and lower-cost solution especially for rapid prototyping of RDLs, since several production steps will be skipped, less material will be wasted and the supply chain will be shortened.

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