The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2001
Filed:
Aug. 24, 1999
Tadhgh O'Brien, Ovens, IE;
Marie Guillot, Cloyne, IE;
Finbarr O'Donoghue, Aherla, IE;
Owen McAuliffe, Donoughmore, IE;
General Semiconductor, Inc., Melville, NY (US);
Abstract
Two phase bridge rectifier, plastic encapsulated devices having four external terminal leads are batch fabricated using a workpiece of three stacked together lead frames wherein, at each of a plurality of device sites on the workpiece, two, two-chip stacks of semiconductor diode chips are provided; each chip of each stack being sandwiched between respective pairs of bonding pads on either top and middle lead frames or middle and bottom lead frames. Each of the two bonding pads of the middle frame is connected to a respective integral terminal lead of the middle frame. An integral extension of a bonding pad of each of the top and bottom lead frames is bent out of the plane of its respective lead frame to include a flat terminal lead portion lying in the plane of the middle frame but not connected thereto. All four in-plane terminal leads include dam bars for use during device encapsulating; the dam bars from the top and bottom lead frames cooperating to form a single, in-plane dam bar. After encapsulation, individual devices are separated from the lead frame workpiece by severing ends of the four terminal leads from their respective lead frames.