Method of making a semiconductor radiation emitter package

  • US 6,828,170 B2
  • Filed: 08/23/2001
  • Issued: 12/07/2004
  • Est. Priority Date: 03/15/1999
  • Status: Expired due to Term
First Claim
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1. A method of making a semiconductor radiation emitter package comprising:

  • forming a leadframe assembly from a sheet, roll, or strip of electrical and thermally conductive material, the leadframe assembly having a heat extraction element and a plurality of leads having a greater thermal resistance than the heat extraction element, at least one tie-bar connecting at least one of said plurality of leads to another;

    bonding at least one semiconductor radiation emitter directly to said heat extraction element with one or more bonding materials, each semiconductor radiation emitter having a plurality of electrodes;

    forming an electrical connection between said at least one of the electrodes and said at least one lead;

    encapsulating said at least one semiconductor radiation emitter with a material substantially transparent to wavelengths emitted by said at least one semiconductor radiation emitter while also encapsulating portions of said heat extraction element and said electrical leads such that some surfaces of said heat extraction element and some surfaces of said electrical leads are left unencapsulated; and

    cutting said at least one tie-bar.

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