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:
Feb. 09, 2016
Filed:
Dec. 29, 2011
Jerome Teysseyre, Singapore, SG;
Glenn DE Los Reyes, Singapore, SG;
Jerome Teysseyre, Singapore, SG;
Glenn de los Reyes, Singapore, SG;
STMICROELECTRONICS PTE LTD., Singapore, SG;
Abstract
A top-gate molding system for encapsulating semiconductor devices includes a plurality of mold cavities formed between a middle plate and a bottom plate, and a runner system formed between an upper plate and the middle plate. The runner system includes a runner with a plurality of reservoirs along its length, with a gate extending from each of the reservoirs to one of the cavities. A particle trap is positioned on the bottom of the runner between a sprue and a first one of the reservoirs, to capture contaminating particles in a flow of molding compound before the particles enter any of the reservoirs. The particle trap can be, for example, a notch or a channel extending transversely across the bottom of the runner, or a dummy reservoir upstream of the first of the plurality of reservoirs.