United States Patent 3,534,233
October 13, 1970

Hermetically Sealed Electrical Device
Arthur H. Long

Filed June 28, 1968
Image of US PATENT 3,534,233

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 descriptions: cover graphic

  • 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.

 Citations [54]:
3,005,867 10/1961 Green et al 3,170,098 02/1968 Marino 3,296,506 01/1967 Steinmetz et al
National Museum of American History
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