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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.:

US 5250839 B1

PDFFull Text
Date of Patent:
Oct. 05, 1993

Filed:

Sep. 25, 1991

Multi-layer leadframes, electrically conductive plates used therefor and

Applicant:
Inventors:

Kazunori Katoh, Tokyo, JP;

Yuji Yamaguchi, Tokyo, JP;

Hiromichi Suzuki, Kodaira, JP;

Takayuki Okinaga, Kodaira, JP;

Takashi Emata, Kodaira, JP;

Osamu Horiuchi, Kodaira, JP;

Assignees:

Dai Nippon Printing Co., Ltd., , JP;

Hitachi, Ltd., , JP;

Hitachi VLSI Engineering Corporation, , JP;

Attorney:

Dellett, Smith-Hill and Walters

Primary Examiner:

Rolf Hille

Assistant Examiner:

S V Clark

Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257666 ; 257669 ; 257674 ;
Abstract

A multi-layer leadframe according to this invention is formed by laminating on a leadframe body an insulating layer and an electrically conductive layer in this order. The electrically conductive plate includes a planar portion and a given number of terminal portions extending therefrom, said planar portion extending across said insulating layer laminated on said leadframe body. The planar portion is made thinner than the terminal portions. A thin portion of this planar portion is formed by an etching technique, and at least a part of the terminal portions of the electrically conductive plate is fixedly connected with an inner lead of the leadframe body.

Find Patent Forward Citations

Katoh, Kazunori. (1993). Multi-layer leadframes, electrically conductive plates used therefor and (U.S. Patent No. 5250839). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5250839

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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