Extended terminal ceramic SMD
View Patent ↗Larger ceramic chip capacitors are reliably mounted with minimal risk of flexure induced cracking on circuit boards by adding terminal extensions to one face of the capacitor and soldering across all or part of the extensions. A ball grid array is preferred.
1. A ceramic capacitor comprising:
a multiplicity of parallel plates in planar relationship wherein each plate terminates at an opposing face in an alternating pattern;
a dielectric between said parallel plates;
two external terminations on opposing sides of said capacitor wherein a first external termination is in electrical contact with alternating plates of said multiplicity of parallel plates and a second external termination is in electrical contact with separate alternating plates of said multiplicity of parallel plates;
at least two conductive terminal extensions applied to the same face between said two terminal extensions and electrically connected to one but not both terminations, said terminal extensions being separated by a gap in the direction of extension.
2. A ceramic capacitor according to claim 1 wherein said conductive terminal extensions are at least as thick as said external terminations on the bottom face of the capacitors.
3. A ceramic capacitor according to claim 1 wherein said terminal extensions may be formed from a different material than said external terminations.
4. A ceramic capacitor according to claim 1 further comprising solder balls or bumps formed in a grid array on said terminal extensions.