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:
Dec. 30, 2025
Filed:
Jul. 03, 2023
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A solder paste including at least two types of solder powders each containing at least two types of metal elements has an average free energy of oxide formation of the at least two types of solder powders on a molar basis of −490 kJ/mol or more, the average free energy of oxide formation being a sum of products (A×B) of a molar ratio (A) of each of the at least two types of metal elements (i) based on all the at least two types of metal elements constituting the at least two types of solder powders included in the solder paste and a free energy (BkJ/mol) of oxide formation of the each of the at least two types of metal elements, and an average melting point of the at least two types of solder powders on a mass basis of 121° C. or lower, the average melting point being a sum of products (C×D) of a mass ratio (C) of each of the at least two types of solder powders (j) based on a total mass of the at least two types of solder powders included in the solder paste and a melting point (D° C.) of the each of the at least two types of solder powders.