US PATENT SUBCLASS 257 / 708
.~ Entirely of metal except for feedthrough

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

678  DF  HOUSING OR PACKAGE {18}
708.~ Entirely of metal except for feedthrough {3}
709  DF  .~.~> With specified insulator to isolate device from housing
710  DF  .~.~> With specified means (e.g., lip) to seal base to cap
711  DF  .~.~> With raised portion of base for mounting semiconductor chip

DEFINITION

Classification: 257/708

Entirely of metal except for feedthrough:

(under subclass 678) Subject matter wherein the housing or package is made entirely of metal except for the portion wherein the electrical contacts or leads are fed through.

(1) Note. Typically, an insulator is placed in the feedthrough portion of a metal housing to prevent electrical short circuiting of the leads to the housing.