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. 30, 2019
Filed:
Aug. 22, 2018
Ngk Insulators, Ltd., Nagoya, Aichi, JP;
NGK INSULATORS, LTD., Nagoya, Aichi, JP;
Abstract
A through conductorprovided in a through hole of a ceramic substrate includes a metal porous body, glass phasesandformed in poresA toD of the metal porous bodyand spacesandin the pores. A ratio of an area of the pores is 5 to 50 percent in a cross section of the through conductor. It is provided that the through conductoris separated into a first partA on a side of the first main surfaceand a second partB on a side of the second main surfacein a direction B of thickness of the ceramic substrate, a ratio of an area of glass phases occupying the pores in the first partA is higher than a ratio of an area of glass phases occupying the pores in the second partB. A ratio of an area of spaces occupying the pores in the first partA is lower than a ratio of an area of the pores occupying the pores in the second partB.