Producing an electromagnetic isolation cavity by stacking tape layers having conductor-coated edge surfaces facing the cavity

Abstract

An electromagnetic isolation cavity surrounded by a generally annular solid conductive wall is produced by coating edge surfaces of respective dielectric tape layers with a material containing a conductor. The tape layers are then stacked, with the coated edge surfaces aligned and facing the electromagnetic isolation cavity.

What is claimed is: 
     
         1 . A method for producing an electromagnetic isolation cavity surrounded by a generally annular solid conductive wall, comprising:
 coating an edge surface of each of a plurality of dielectric tape layers with a material comprising a conductor;   drying the material coated on the edge surfaces; and   after said coating, stacking the tape layers on a ground plane formed from a material comprising a conductor, to form a tape stack with the coated edge surfaces aligned and facing the electromagnetic isolation cavity and with the ground plane defining a closed end of the electromagnetic isolation cavity.   
     
     
         2 . The method of  claim 1 , wherein said coating includes using a screen emulsion to stencil said material onto each said dielectric tape layer, and thereafter flowing said material along the dielectric tape layer onto said edge surface thereof. 
     
     
         3 . The method of  claim 2 , wherein said coating includes using a screen emulsion to stencil said material onto opposite side surfaces of each said dielectric tape layer that are connected by said edge surface of the dielectric tape layer, and said flowing includes flowing said material from said opposite side surfaces onto said edge surface. 
     
     
         4 . The method of  claim 3 , wherein said using a screen emulsion to stencil material onto opposite side surfaces includes stenciling material onto one side surface, and thereafter inverting the dielectric tape layer and stenciling material onto the other side surface. 
     
     
         5 . The method of  claim 3 , wherein the coated edge surfaces form a generally annular solid conductive wall surrounding the electromagnetic isolation cavity.