Context: Dai Nippon Printing, the Tokyo-based printing and electronics group, sued Zapp AG and Zapp Precision Metals GmbH at the UPC Dusseldorf Local Division (LD) in May 2025 over EP3805415 (“Metal plate for manufacturing deposition mask, method for manufacturing metal plate, deposition mask and method for manufacturing deposition mask”). Zapp is a German precision metals group, and its SuperClean Invar 36 foil is used by customers to make the deposition masks that form pixels in OLED displays. The patent limits the number of small foreign particles in an iron and nickel foil, because such particles disturb the holes etched into a mask.
To Read The Full Story
Continue reading your article with a Membership
Court and counsel
Dusseldorf Local Division, Panel 1: Presiding Judge Ronny Thomas, legally qualified Judges Dr. Jule Schumacher and Judge-rapporteur Dr. Tatyana Zhilova, and technically qualified Judge Lorenzo Parrini.
Dai Nippon Printing is being represented by Wildanger’s Dr. Soenke Fock, Thorben Strich, Jan-Caspar Maiers, and Alex-Christian Lesch, together with Cohausz & Florack’s Dr.-Ing. Jochen Kapfenberger, Georg Tully, and Dr. Frederik Tenholt.
Meanwhile, Zapp is being represented by Hoffmann Eitle’s Holger Stratmann, Dr. Henrik Vocke, and Philipp Zambelli.