Hermetic packages and methods of fabricating same

Claim 1

The method defined in claim 1 wherein said metal plates are formed from sheets of metal having different thickness and wherein the thinnest of said plates is the plate which is directly conductively heated whereby heat conduction in the plane thereof is low and heat conduction normal to the plane thereof is high so that heat energy flows more readily into said solder glass to effect fusion of said coatings.

Claim 2

A method of forming a hermetically sealed container comprising the steps of forming a pair of metal plates, forming an endless rib of glass on the surface of one of said plates, insulatingly embedding electrical component leads in said rib, coating one surface of the other of said metal plates with glass, bringing said plates together with the edge of said rib in engagement with the glass coating on said other metal plate, conductively heating the outside edge of said other metal plate opposite said rib to effect fusion of said rib with said coating.

Claim 5

A method of forming a hermetically sealed container comprising the steps of: shaping a first oxidized metal plate to a desired perimetrical design, shaping a second oxidized metal plate to a substantially like perimetrical design as said first oxidized metal plate and having a higher thermal resistance in the plane thereof than said first metal plate, coating one surface of each of said plates with a material glaze formable upon application of sufficient heat, heating said plates to a temperature sufficient to cause said material to form a glaze bonded to said metal plates, positioning a device between said metal plates with the glaze coatings on said metal plates contiguous to each other at least along the perimetrical edges thereof, and directly conductively applying heat to the perimetrical edge only of said second plate to raise the temperature of said glaze material to the fusion point thereof but below the temperature to which said plates are heated to form the glaze coatings thereon.

Claim 7

A method of forming a hermetically sealed package comprising the steps of: shaping a first oxidized metal plate to a desired perimetrical design, forming an endless rib of glass-like material on one surface of said plate and having a design corresponding generally to the perimetrical design of said metal plate, shaping a second oxidized metal plate to a substantially like perimetrical design, said second metal plate having a higher thermal resistance in the plane thereof than said first metal plate, treating one surface of said second metal plate so that said seconD metal plate may be bonded to said glass rib at a temperature substantially below the temperature required to bond said glass rib to said first metal plate, bringing said plates together with the edge of said glass rib in engagement with the treated surface of said second metal plate, and directly conductively heating the outside perimetrical edge only of said second metal plate opposite said rib to effect fusion of said rib with the treated surface of said second metal plate by contacting same with a heated member having a shape and size corresponding to the shape of said rib.