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Structure with etchable metal

  • US 5,672,407 A
  • Filed: 03/15/1996
  • Issued: 09/30/1997
  • Est. Priority Date: 02/14/1991
  • Status: Expired due to Term
First Claim
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1. A novel element, comprising:

  • a self-supporting flexible layer of aluminum having a thickness of about 1 to about 15 microns, having a first face and a second face and having a plurality of apertures formed therethrough with each said aperture being in registry in each said face,said plurality of apertures comprising a plurality of elongate slots in said self-supporting flexible layer of aluminum sized and arranged to generate thermal energy when the element is adjacent a foodstuff and exposed to microwave radiation,a layer of aqueous sodium hydroxide -resistant material adhered to each said face of said self-supporting flexible layer of aluminum in a pattern completely overlying said aluminum layer and defining the periphery of each of said plurality of apertures, anda layer of dielectric material adhered to and coextensive with each face of said element.

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