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:
Oct. 16, 2018
Filed:
Mar. 12, 2014
Applicant:
Hitachi Metals, Ltd., Tokyo, JP;
Inventor:
Nobuhiko Chiwata, Kitakyushu, JP;
Assignee:
HITACHI METALS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 3/02 (2006.01); H05K 3/06 (2006.01); H05K 3/26 (2006.01); H01L 23/373 (2006.01); H01L 21/48 (2006.01); C04B 35/584 (2006.01); C04B 37/02 (2006.01); H05K 3/38 (2006.01); C04B 41/91 (2006.01); H01L 23/12 (2006.01); H05K 1/03 (2006.01); H01L 23/15 (2006.01);
U.S. Cl.
CPC ...
H05K 3/067 (2013.01); C04B 35/584 (2013.01); C04B 37/026 (2013.01); C04B 41/91 (2013.01); H01L 21/4846 (2013.01); H01L 23/12 (2013.01); H01L 23/3735 (2013.01); H05K 3/26 (2013.01); H05K 3/38 (2013.01); H05K 3/388 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/6025 (2013.01); C04B 2237/124 (2013.01); C04B 2237/125 (2013.01); C04B 2237/127 (2013.01); C04B 2237/366 (2013.01); C04B 2237/368 (2013.01); C04B 2237/407 (2013.01); H01L 23/15 (2013.01); H01L 2924/0002 (2013.01); H05K 1/0306 (2013.01); H05K 2201/0355 (2013.01); H05K 2203/0789 (2013.01);
Abstract
A method for producing a ceramic circuit board comprising the steps of bonding a metal sheet to a ceramic substrate via a brazing material containing Ag to form a bonded body; etching the bonded metal sheet to form a circuit pattern; and removing an unnecessary brazing material from the substrate provided with the circuit pattern, by etching with an acidic solution comprising carboxylic acid and/or carboxylate and hydrogen peroxide.