Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-05-25
1991-09-24
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Electrical device making
29595, 361392, 361421, H01F 706, H05K 702
Patent
active
050502921
ABSTRACT:
An improved automated method for the manufacture of alternatively sized passive transponder devices is presented which utilizes a single leadframe design and manufacturing process, including automated coil winding and wire-to-lead termination. A specially designed leadframe is prepared, with augmented leads, and is coated with a thin layer of silver. One or more semiconductor chips are bonded to individual assembly sites on the leadframe, after which the lead-die assembly is encapsulated by transfer molding. The cap and leads are singulated, and a bobbin is attached to the leads, which extend laterally from each individual molded cap. In an automated process, a conductive wire is attached to a first of the protruding leads, fly-wound around the bobbin core, and terminated by connection to a second of the protruding leads.
REFERENCES:
patent: 3836842 (1974-09-01), Zimmermann et al.
patent: 4074227 (1978-02-01), Kalmus
patent: 4142289 (1979-03-01), Koethke
patent: 4210483 (1980-07-01), Kent
patent: 4269367 (1981-05-01), Minami et al.
patent: 4721935 (1988-01-01), Gunnels et al.
Hadden Leonard D.
Troyk Philip R.
Zirbes Glen L.
Dungba Vo Peter
Gorski Joseph M.
Trovan Limited
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