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Metallized microwave diffuser films

  • US 5,300,746 A
  • Filed: 09/06/1991
  • Issued: 04/05/1994
  • Est. Priority Date: 11/08/1990
  • Status: Expired due to Fees
First Claim
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1. A microwave diffuser film for use during microwave heating of objects, comprising:

  • (a) a first substrate that is substantially transparent to microwave energy, the substrate having a first surface for receiving a microwave energy field and at least one second surface across which microwave energy is transferred; and

    (b) microwave-interactive elements deposited on the first surface for interacting with microwave energy received thereon to produce a modified microwave energy field and to transfer said microwave energy field across said at least one second surface, said microwave-interactive elements comprising a plurality of discrete metallic elements having a sheet resistance in the range of 2.0 to 0.05 ohms per square arranged in a pattern so that the transferred microwave energy field is substantially uniform, the metallic elements separated by nonmetallic areas, said metallic elements substantially incapable of converting microwave energy to heat.

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