How does tape casting help make multilayer ceramic capacitors?

Tape casting is a critical manufacturing process used to create the thin dielectric layers required for multilayer capacitors (MLCs).1

In this process, a ceramic powder slurry—typically containing a binder and solvent—is spread to a precise, uniform thickness onto a carrier surface using a method such as doctor blading. Once the solvent evaporates, the resulting thin, flexible ceramic tape is dried and processed.21

To construct the capacitor, these dielectric layers are interleaved with electrode layers, often made of palladium or a palladium-silver alloy. This stacking allows for the creation of compact, high-capacitance components by connecting alternate electrode layers in parallel. Finally, the finished "builds" of alternating dielectric and electrode layers are diced into cubes and cofired at high temperatures to form a monolithic structure. This technique enables the production of extremely thin dielectric layers—as small as 5 micrometres—which are essential for the small size and high-frequency performance of modern MLCs.1