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Method of encapsulating hard disc drive and other electrical components

  • US 6,911,166 B2
  • Filed: 10/17/2001
  • Issued: 06/28/2005
  • Est. Priority Date: 10/17/2001
  • Status: Expired due to Term
First Claim
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1. A method of reducing sympathetic resonances of a component in a hard disc drive comprising:

  • a) providing a hard disc drive component;

    b) determining a desired resonance spectrum of frequencies to avoid for said hard disc drive component;

    c) placing said hard disc drive component in a mold cavity of an injection molding machine having a controllable fill rate and a controllable injection pressure;

    d) closing said mold cavity;

    e) injecting a molten phase change material into said mold cavity;

    f) monitoring and controlling the pressure in the mold cavity; and

    g) monitoring and controlling one or more of the fill rate of said molten phase change material and injection pressure to obtain said hard disc drive component with the phase change material thereon, having said desired resonance spectrum.

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