Hybrid additive manufacturing of the modified electrolyte-electrode surface of planar solid oxide fuel cells

Digital Control of the surface patterning of functional layers of solid oxide fuel cells (SOFCs), via the inkjet printing technique, offers better efficiency in performance. A combination of inkjet printing and tape casting in a single machine system defines as hybrid additive manufacturing, facilitates printing complex structures. Also, implementing this idea removes the blocking of the print head nozzle orifice issue. In this paper, a highly dispersed and long-term stable colloidal zirconia-based suspension, with optimal printability characteristics, is designed to be prepared in approximately three hours to fabricate the macro patterned structure of the SOFC electrolyte. Hybrid Additive Manufacturing is successfully employed to make a symmetric cathode side cell with a modified electrolyte-electrode surface to reduce the electron resistivity.     

Ultrathin wafer level chip size package

The ShellCase wafer-level packaging process uses commercial semiconductor wafer processing equipment. Dies are packaged and encapsulated into separate enclosures while still in wafer form. This wafer level chip size package (WLCSP) process encases the die in a solid die-size glass shell. The glass encapsulation prevents the silicon from being exposed and ensures excellent mechanical and environmental protection. A proprietary compliant polymer layer under the bumps provides on board reliability. Bumps are placed on the individual contact pads, are reflowed, and wafer singulation yields finished packaged devices. This WLCSP fully complies with Joint Electron Device Engineering Council (JEDEC) and surface mount technology (SMT) standards. Such chip scale packages (CSP's) measure 300-700 μm in thickness, a crucial factor for use in various size sensitive electronic products     

Characterization of Peptide‐Nanostructure‐Modified Electrodes and Their Application for Ultrasensitive Environmental Monitoring

Dense arrays of self‐assembled nanostructures are highly important for the fabrication of high‐performance sensors of large surface area. The organized incorporation of novel biocompatible organic nanostructures into extremely sensitive amperometric biosensors is demonstrated. Peptide nanoforest biosensors for phenol detection were 17‐fold more sensitive than uncoated electrode and more sensitive than those modified with carbon nanotubes or combined coating. The high sensitivity reported, together with the biocompatibility and the ability to chemically and biologically modify these elements, may provide a novel platform for biosensors design and fabrication for environmental monitoring, homeland security, and other applications.