Abstract of the Disclosure

A hermetically sealed case member for an electrical device including a base member having a semiconductor-supporting surface and having a peripheral weld flange around the surface, a header having a peripheral weld flange coextensive with the weld flange on the base member, a weld ring disposed between the flanges and having upper and lower edges welded to the header flange and the base flange respectively, and the weld ring being composed of a metal having an electrical resistivity ranging from about 6 to 14x10^-6 ohm-cm.

• Figure 1 is a longitudinal sectional view of a prior art device which is partially exploded to show the manner in which the header is attached to the base of the device.

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3,005,867  10/1961  Green et al
3,170,098  02/1968  Marino
3,296,506  01/1967  Steinmetz et al