发明授权
US06304425B1 Circuit board having thereon coupled ceramic capacitors and method for the manufacture thereof 有权
具有耦合陶瓷电容器的电路板及其制造方法

  • 专利标题: Circuit board having thereon coupled ceramic capacitors and method for the manufacture thereof
  • 专利标题(中): 具有耦合陶瓷电容器的电路板及其制造方法
  • 申请号: US09441960
    申请日: 1999-11-17
  • 公开(公告)号: US06304425B1
    公开(公告)日: 2001-10-16
  • 发明人: Nobuo Mamada
  • 申请人: Nobuo Mamada
  • 优先权: JP10-350382 19981209; JP11-237334 19990824
  • 主分类号: H01G406
  • IPC分类号: H01G406
Circuit board having thereon coupled ceramic capacitors and method for the manufacture thereof
摘要:
A circuit board having coupled multilayered ceramic capacitors mounted thereon considerably reduces the generation of sounds developed by piezoelectric effects in the capacitors. A method for mounting the capacitors on the circuit board includes the step of forming lands for mounting the capacitors thereon at substantially plane-symmetrical positions on the front surface and the back surface of the circuit board, two lands at their substantially plane-symmetrical positions being connected each other. The capacitors, which are substantially identical each other, are then mounted on the lands of the front and the back surfaces such that the capacitors are disposed at substantially plane-symmetrical positions and electrically coupled to the lands. As a result, vibrations being transferred from the capacitors to the circuit board are cancelled out with each other and the resonance of the circuit board due to the vibrations from the capacitors is prevented, resulting in the generation of audible sounds with high sound pressure levels being considerably reduced compared to that of the prior art.
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