LOW NOISE CAPACITORS

摘要

Relatively low noise capacitors are provided for surface mounted applications. Electro-mechanical vibrations generate audible noise, which are otherwise relatively reduced through modifications to MLCC device structures, and/or their mounting interfaces on substrates such as printed circuit boards (PCBs). Different embodiments variously make use of flexible termination compliance so that surface mounting has reduced amplitude vibrations transmitted to the PCB. In other instances, side terminal and transposer embodiments effectively reduce the size of the mounting pads relative to the case of the capacitor, or a molded enclosure provides standoff, termination compliance and clamping of vibrations.

主权项

1. A surface mountable relatively low noise multilayer ceramic capacitor (MLCC) capacitor assembly, comprising:
a main body having a plurality of conductive layers of respective first and second polarities interleaved with a plurality of ceramic layers to form respective pairs of opposing capacitor plates in a stacked arrangement; and respective first and second polarity terminations on opposite ends of said main body and electrically connected, respectively, to said first and second polarity conductive layers, wherein said terminations include a compliant layer for relatively dampening vibrations between said capacitor assembly and a surface on which it is mounted for relatively reducing electro-mechanical noise.