Harima Chemicals, Incorporated

Kazuya Ichikawa

Tadashi Takemoto

Kosuke Inoue

Kazuki Ikeda

Kensuke Nakanishi

Tetsuyuki Shigesada

A solder alloy essentially consists of tin, silver, copper, bismuth, antimony, and cobalt; relative to a total amount of the solder alloy, the silver content is 3 mass % or more and 3.5 mass % or less, the copper content is 0.4 mass % or more and 1.0 mass % or less, the bismuth content is 3.5 mass % or more and 4.8 mass % or less, the antimony content is 3 mass % or more and 5.5 mass % or less, the cobalt content is 0.001 mass % or more and 0.1 mass % or less, the tin content is the balance; and a total of the bismuth content and the antimony content is 7.3 mass % or more and 10.3 mass % or less.

Solder alloy, solder paste, and electronic circuit board

A solder alloy substantially consists of tin, silver, indium, bismuth, and antimony. With respect to the total amount of the solder alloy, the content ratio of the silver is 2.8 mass % or more and 4 mass % or less; the content ratio of the indium is 6.2 mass % or more and 9.0 mass % or less; the content ratio of the bismuth is 0.7 mass % or more and 5.0 mass % or less; the content ratio of the antimony is 0.3 mass % or more and 5.0 mass % or less; and the content ratio of the tin is the remaining ratio and the value of A is 4.36 or less wherein A=0.87&#xd7;[In content ratio (mass %)]&#x2212;0.41&#xd7;[Ag content ratio (mass %)]&#x2212;0.82&#xd7;[Sb content ratio (mass %)].

A solder alloy is a tin-silver-copper solder alloy substantially consisting of tin, silver, copper, bismuth, nickel, cobalt, and indium. With respect to the total amount of the solder alloy, the content ratio of the silver is 2 mass % or more and 5 mass % or less; the content ratio of the copper is 0.1 mass % or more and 1 mass % or less; the content ratio of the bismuth is 0.5 mass % or more and 4.8 mass % or less; the content ratio of the nickel is 0.01 mass % or more and 0.15 mass % or less; the content ratio of the cobalt is 0.001 mass % or more and 0.008 mass % or less; the content ratio of the indium is above 6.2 mass % and 10 mass % or less; and the content ratio of the tin is the remaining ratio.

Solder alloy, solder composition, solder paste, and electronic circuit board

A solder alloy is a tin-silver-copper solder alloy, and contains tin, silver, copper, bismuth, nickel, and cobalt. Relative to the total amount of the solder alloy, the silver content is 2 mass % or more and 4 mass % or less, the nickel content is 0.01 mass % or more and 0.15 mass % or less, and the cobalt content is 0.001 mass % or more and 0.008 mass % or less.

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Hyogo, Japan

Kazuya Ichikawa