Importance

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Abstract

A bonding wire according to the invention contains a core having a surface, in which the core contains silver as a main component and at least one element selected from gold, palladium, platinum, rhodium, ruthenium, nickel, copper, and iridium. The wire exhibits at least one of the following properties:

I. an average size of crystal grains of the core is between 0.8 μm and 3 μm,II. the amount of crystal grains having an orientation in the <001> direction in a wire cross section is in a range of 10-20%,III. the amount of crystal grains having an orientation in the <111> direction in a wire cross section is in a range of 5-15%, andIV. the total amount of crystal grains having orientations in the <001> and <111> directions in a wire cross section is in a range of 15-40%.

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First Claim