Furnace frame attachment boat and method
AssigneeNational Semiconductor Corporation
InventorPimukmanuskit Surachai
Life of this patent
Estimating the term…
Abstract
A furnace boat assembly for in furnace attachment of frames to ceramic integrated circuits and the like includes a pair of end rails spaced apart, with a plurality of spaced apart support rods extending between the rails and a plurality of guide and support members for guiding and supporting a plurality of lead frames formed in a generally U-shape, and for locating and supporting a plurality of ceramic base members with glass solder in position on the frames for movement through a furnace for heating the solder to a bonding or melting temperature, for allowing the bonding of the lead frames to the ceramic base member.
Claims10
A boat assembly for attachment of a lead frame and base together in a furnace, said boat comprising:
- a first guide and support means for guiding and supporting one end of a lead frame,
- a second guide and support means for guiding and supporting the other end of said lead frame;
- and
- base guide means for guiding a base member relative to said lead frame for connection thereto upon passage through a furnace.
A method of attaching lead frames to ceramic bases comprising the steps of:
- selecting a boat assembly having support means for supporting multiple lead frames and guide means for guiding a base into attachment position with respect to each of the lead frames;
- loading a plurality of lead frames on said support structure;
- placing a base in said guide means for each lead frame;
- and
- passing the loaded boat assembly through a furnace for melting solder glass in contact with said base and frame.
Dependencies are inferred from the claim text.