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:
Sep. 02, 1997
Filed:
Feb. 16, 1996
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A plastic molding method for semiconductor devices, the method including placing semiconductor devices mounted on lead-frames between lower die cavities in a lower die chase block and upper die cavities in an upper die chase block and clamping the upper and lower die chase blocks together; evacuating an ejector chamber in the lower die chase block through a lower die common surface table, evacuating an ejector chamber in the upper die chase block through an upper die common surface table, and evacuating a parting chamber at a parting surface between the lower die chase block and the upper die chase block through one of the lower die common surface table and the upper die common surface table; and injecting a sealing resin into the upper die cavities and the lower die cavities to plastically package the semiconductor devices.