IC package having replaceable backup battery

A premolded package assembly having an encapsulated electronic circuit device and a socket for receiving a replaceable battery for providing electrical power to said encapsulated electronic circuit device comprising, in combination:

• a first body of non-conductive material having a support surface;
• a finger lead assembly mounted onto said support surface, said finger lead assembly having a plurality of conductive finger leads extending across said support surface, with one of said finger leads defining a first polarity power lead, and exactly one of said finger leads defining a second polarity power lead having a terminal contact portion projecting externally of said first body of non-conductive material;
• a second body of non-conductive material assembled onto said first body of non-conductive material and confining said finger lead assembly therebetween, said second body of non-conductive material being intersected by a device cavity for receiving an electronic circuit device;
• an electronic circuit device disposed within said device cavity and having a plurality of input/output nodes electrically connected to said conductive finger leads;
• said second body of non-conductive material being intersected by a battery interface cavity thereby exposing one of said power leads in the interface between said first and second non-conductive bodies, and said second body of non-conductive material having shoulder portions defining a socket cavity in open alignment with said battery interface cavity for receiving a backup battery, wherein a first polarity contact terminal of a backup battery is insertable into said interface cavity in electrical contact with said first power lead within said battery interface cavity when a backup battery is loaded into said socket cavity;
• and,
• the externally projecting terminal contact portion of said second polarity conductive power lead being disposed for releasable electrical contacting engagement with the second polarity contact terminal of a backup battery when a backup battery is loaded into said socket cavity, the externally projecting terminal contact portion applying a bias retaining force against said second polarity contact terminal.

In an electronic circuit package of the type having a circuit device including multiple input/output nodes encapsulated within a body of non-conductive material, a plurality of connector pins mounted onto said body of non-conductive material and projecting externally thereof, and a plurality of conductive finger leads encapsulated within said body of non-conductive material electrically connecting said input/output nodes to said connector pins, the improvement comprising:

• said body of non-conductive material being intersected by an external socket for receiving a backup battery of the type having positive and negative polarity terminals, and said body of non-conductive material being intersected by a battery interface cavity which opens into said battery socket for exposing one of said conductive finger leads within said body of non-conductive material for electrical contacting engagement by a power terminal of a replaceable battery loaded within said external socket cavity;
• and,
• exactly one of said conductive finger leads defining a second power lead having a terminal contact portion projecting externally of said body of non-conducting material, the externally projecting terminal contact portion of said second conductive power lead being disposed for releasable electrical contacting engagement with the second polarity contact terminal of a backup battery when a backup battery is loaded into said socket, wherein the externally projecting terminal contact portion applies a bias retaining force against said second polarity contact terminal.

An integrated circuit package comprising, in combination:

• a first body of non-conductive material having a support surface,
• a finger lead assembly mounted onto said support surface, said finger lead assembly having a base plate, and a plurality of conductive finger leads extending across said support surface, with one of said finger leads defining a first power lead, and one of said finger leads defining a second power lead having a terminal contact portion projecting externally of said first body of non-conductive material;
• a second body of non-conductive material having a chip cavity for receiving an integrated circuit chip device, said second body being assembled onto said first body with said chip cavity providing a clearance opening about said base plate;
• an integrated circuit chip mounted onto said base plate and received within the clearance opening of said chip cavity, said integrated circuit chip having a plurality of input/output nodes and a plurality of wire conductors connecting said input/output nodes to said conductive finger leads;
• said second body of non-conductive material having a battery interface cavity providing an access opening to said first conductive power lead and having shoulder portions defining a socket cavity in open alignment with said interface cavity for receiving a backup battery, wherein a first polarity contact terminal of a backup battery is insertable into said interface cavity in electrical contact with said first power lead when a backup battery is loaded into said socket;
• and,
• the externally projecting terminal contact portion of said second conductive power lead being disposed for releasable electrical contacting engagement with the second polarity contact terminal of a backup battery when a backup battery is loaded into said socket, wherein the externally projecting terminal contact portion applies a bias retaining force against said second polarity contact terminal.