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:
Apr. 05, 2005
Filed:
Dec. 21, 2001
Hiroki Takeuchi, Komaki, JP;
Toshifumi Kojima, Komaki, JP;
Kazushige Obayashi, Nagoya, JP;
Hisahito Kashima, Nagoya, JP;
Hiroki Takeuchi, Komaki, JP;
Toshifumi Kojima, Komaki, JP;
Kazushige Obayashi, Nagoya, JP;
Hisahito Kashima, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
The present invention provides a wiring board in which electronic components are embedded by means of an embedding resin which attains a high mounting density of the electronic components in the wiring board, which exhibits excellent electrical properties such as insulating property, which prevents random reflection of light, and which reduces non-uniformity in color of the resin during curing thereof. The present invention includes a wiring board in which electronic components are embedded by use of an embedding resin having a dielectric constant of less than or equal to about 5 and tan δ of less than or equal to about 0.08. The embedding resin preferably contains carbon black in an amount of less than or equal to about 1.4 mass %. Moreover, the embedding resin preferably contains at least a thermosetting resin and at least one inorganic filler.