On-line monitoring and feedback control of inkjet printed capacitors using the modular custom made printing platform MicroStack3D
Abstract:The paper presents a new feature of our modular printing Platform MicroStack3D . The MicroStack3D system allows one to use inkjet printing for new applications. It has been successfully used to produce freestanding 3D structures using the phase change of an aqueous ink  or to print solenoidal receiver coils onto cylindrical glass capillaries  to mention two of the already achieved applications. So far the printed structures had a predetermined shape, which was chosen and programmed into the system. The work reported here goes one step further by feeding information about physical properties of the printed structures back into the system. This feedback allows the inline correction of a print. A first application is realised by the printing of capacitors. A silver ink is printed onto a temperature controlled substrate and directly sintered, the resulting change in capacitance is monitored on-line and stops the printing process when a certain value is reached. The principle of a feedback-loop for inkjet printing, not only applies to printing capacitors, but it can be used for the fine tuning of any physical property that can be changed by inkjet printing like, for example, resistors, inductors, mechanical resonators or chemical properties. The modular design of MicroStack3D allows the quick integration of measurement equipment into the system.
Document Type: Research Article
Publication date: January 1, 2010
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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