Ausgehend von der Anwendung von Folienhinterspritzprozessen für dekorative Zwecke wurde deren Nutzung für die Integration elektronischer Strukturen in Kunststoffbauteile untersucht. Die Herstellung der elektronischen Bauelemente erfolgte mittels verschiedener Druckverfahren mit elektrisch leitfähigen und dielektrischen Materialien auf Polycarbonatfolien. Im Fokus standen zum einen kapazitiv auslesbare Speicherstrukturen und zum anderen Elektrolumineszenzleuchten. Nach dem Druck wurden die bedruckten Folien z. T. verformt und hinterspritzt. In der Arbeit wird auf die Auswirkungen der Verform- und Hinterspritzprozesse eingegangen. Schwerpunktmäßig wird die elektronische bzw. optische Funktionalität der Bauelemente, die Beeinflussung durch Klimaveränderungen und die Haftfestigkeit der Folien betrachtet. Im Ergebnis konnten erstmals die Realisierbarkeit hinterspritzter elektronischer Bauelemente nachgewiesen sowie verschiedene Einflussfaktoren auf deren Funktionalität identifiziert werden. / Based on the application of film insert molding for graphic purposes, the utilization of this process for the integration of electronic devices into plastic components was examined. The manufacturing of the electronic devices was realized by applying electrical conductive and dielectric inks on polycarbonate foil by various printing processes. Capacitive data storage patterns and electroluminescent lamps are the main applications. The production sequence included the printing process, forming of the foil where required and back injection molding. The impact of forming and film insert molding was investigated. The electronic and/or optical functionality of the devices, the influence of ambient conditions like temperature or humidity and the adhesion strength of the foils were in the focus of the evaluation. As a result, the feasibility of film insert molded electronic devices could be verified and various impact factors could be identified for the first time.

Active screen plasma nitrocarburizing (ASPNC) increases the surface hardness and lifetime of austenitic stainless steel without deteriorating its corrosion resistance. Using an active screen made of carbon opens up new technological possibilities that have not been exploited to date. In this study, the effect of screen power variation without bias application on resulting concentrations of process gas species and surface modification of AISI 316L steel was studied. The concentrations of gas species (e.g., HCN, NH3, CH4, C2H2) were measured as functions of the active screen power and the feed gas composition at constant temperature using in situ infrared laser absorption spectroscopy. At constant precursor gas composition, the decrease in active screen power led to a decrease in both the concentrations of the detected molecules and the diffusion depths of nitrogen and carbon. Depending on the gas mixture, a threshold of the active screen power was found above which no changes in the expanded austenite layer thickness were measured. The use of a heating independent of the screen power offers an additional parameter for optimizing the ASPNC process in addition to changes in the feed gas composition and the bias power. In this way, an advanced process control can be established.