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Towards high energy density glass capacitors

Ceramic Transactions

Wilke, Rudeger H.T.; Casias, Adrian L.; Fitzgerald, Carl F.; Dean, Amanda N.; Timon, Robert P.

The reports of 35 J/cc energy density in thinned alkali-free glasses make it a top candidate for next generation high energy density capacitors. In this article, we demonstrate a scalable process to take currently available commercial glass and fabricate fully packaged capacitors. These prototypes have 0.086 J/cc energy density at 1000 V, making them competitive with some commercially available ceramic capacitors. This was achieved while focusing on developing a process for thinning and handling the glass and without minimization of the inactive volume of the capacitor. These results portend the achievement of significantly higher energy densities in devices made from alkali-free glass.

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Fabrication of Solid-State Multilayer Glass Capacitors

IEEE Transactions on Components, Packaging and Manufacturing Technology

Wilke, Rudeger H.T.; Brown-Shaklee, Harlan J.; Casias, Adrian L.; Cunningham, Billy C.; Dean, Amanda N.; Vecchio, Michael A.; Vudatha, Rohith

Alkali-free glasses show immense promise for the development of high-energy density capacitors. The high breakdown strengths on single-layer sheets of glass suggest the potential for improved energy densities over existing state-of-the art polymer capacitors. In this paper, we demonstrate the ability to package thin glass to make solid-state capacitors. Individual layers are bonded using epoxy, leading to capacitors that exhibit stable operation over the temperature range -55 °C to +65 °C. This fabrication approach is scalable and allows for proof testing individual layers prior to incorporation of the stack, providing a blueprint for the fabrication of high-energy density capacitors.

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5 Results
5 Results