Low profile semiconductor package

Claim 1

A plastic encapsulated semiconductor device housing for mounting by plug-in to a socket on a printed circuit board; said device comprising, in combination: a relatively thin, flat conductive rectangular bar having a length greater than its width and a width greater than its thickness, said bar having parallel side edges spaced by said width of said bar and parallel major surface areas spaced by said thickness of said bar; at least first and second semiconductor die each having first and second surfaces, said first surface of each of said die physically coupled to one of said parallel major surfaces of said conductive bar; at least first, second and third elongated conductive leads each having a rididity sufficient to enable plug-in connection to a socket and each having a lateral cross-sectional area substantially smaller than that of said conductive bar, said first lead having one end connected to said second surface of said first die, said second lead having one end connected to said one of said major surfaces of said conductive bar at a point adjacent to at least one of said die, said third lead having one end connected to said second surface of said second die, said first, second and third elongated leads being parallel to one another and extending perpendicular to said length of said conductive bar, said first, second and third leads having substantially the same length and extending freely beyond one of said side edges of said bar; and a rectangular insulation enclosure for hermetically enclosing said at least first and second die and portions of said first, second and third leads along the length thereof which are coextensive with the width of said bar; said insulation enclosure consisting of a premolded insulation cap filled with an insulation epoxy which encapsulates said die and portions of said first, second and third leads and which secures said cap to said bar; each of said least first and second die mounted on opposite sides of the longitudinal center of said bar and laterally centrally located on said one of said surfaces of said bar; said first, second and third leads being coplanar with one another and parallel to the planes of said major surface areas of said bar; said second lead being disposed between said first and third leads; said cap having a longitudinal skirt extending from one side thereof and at least one leg extending from the opposite side thereof; said bar having a notch is one of said side edges thereof; said skirt of said cap fitting into said notch; said at least one leg of said cap extending over the other of said side edges of said bar.