Abstract: An improved capacitor assembly has a rectangular top and bottom electrodes secured to a ceramic block having flat top and bottom faces. Opposite end and side edges of the block and electrodes are beveled and curved and corners of the assembly are rounded. This provides a rugged and more reliable capacitor structure in which abrupt metal-to-ceramic surfaces are eliminated. Any tendency of electrodes to separate from the ceramic block due to mechanical or thermal shocks are minimized. The capacitor may be embodied in a hybrid electronic circuit, a microstrip conductor-capacitor assembly, or the like.