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. 11, 2009
Filed:
Jul. 05, 2005
Steven J. Roskowski, Farmington Hills, MI (US);
Kenneth W. Morgan, Lake Orion, MI (US);
Gregg W. Petrosky, Warren, MI (US);
Gregory S. Lewis, Clinton Township, MI (US);
Steven J. Roskowski, Farmington Hills, MI (US);
Kenneth W. Morgan, Lake Orion, MI (US);
Gregg W. Petrosky, Warren, MI (US);
Gregory S. Lewis, Clinton Township, MI (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
A method is provided for the punching of a bridge break and thereafter sealing the bridge break during the injection molding process of the lead frame. The bridge breaking tool is placed over the bridge that is to be broken. The collar presses down on the circuit and the punch presses down on the bridge with enough force to form the bridge break. Once the bridge break is formed the punch is retracted from the cavity of the template and molten polymer is injected to flow around the ends of the bridge break. The bridge breaking tool's hold down collars and retracted punch form a molding area for molten polymer to flow over the bridge break and the exposed circuit area. The bridge breaking tool is retracted after the bridge break is encased in the cured molten polymer and the cured molten polymer forms a lead frame structure.