Gold alloy wire for ball bonding
AssigneeTanaka Denshi Kogyo K.K.
InventorsMitsuo Takada, Satoshi Teshima, Takeshi Kuwahara
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Abstract
There is provided a gold alloy wire for a ball bonding. The gold alloy consists of 10 to 50 ppm by mass of magnesium (Mg); 5 to 20 ppm by mass of europium (Eu); 2 to 9 ppm by mass of calcium (Ca); and a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass. In the gold alloy wire for a ball bonding, an addition amount of calcium (Ca) is a maximum of half that of europium (Eu).
Claims8
A gold alloy wire for a ball bonding, the gold alloy consisting of:
- 10 to 50 ppm by mass of magnesium (Mg);
- 5 to 20 ppm by mass of europium (Eu);
- 2 to 9 ppm by mass of calcium (Ca);
- and
- a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass, wherein
- the amount of calcium (Ca) is a maximum of half that of europium (Eu).
A gold alloy wire for a ball bonding, the gold alloy consisting of:
- 10 to 50 ppm by mass of magnesium (Mg);
- 1 to 30 ppm by mass of tin (Sn);
- 5 to 20 ppm by mass of europium (Eu);
- 2 to 9 ppm by mass of calcium (Ca);
- and
- a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass, wherein
- the amount of calcium (Ca) is a maximum of half that of europium (Eu).
A gold alloy wire for a ball bonding, the gold alloy consisting of:
- 10 to 50 ppm by mass of magnesium (Mg);
- 5 to 20 ppm by mass of europium (Eu);
- 2 to 9 ppm by mass of calcium (Ca);
- and
- a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass, wherein
- a weight of calcium (Ca) is a maximum of half that of europium (Eu), and a total amount of europium (Eu) and calcium (Ca) is a maximum of 25 ppm by mass.
A gold alloy wire for a ball bonding, the gold alloy consisting of:
- 10 to 50 ppm by mass of magnesium (Mg);
- 1 to 30 ppm by mass of tin (Sn);
- 5 to 20 ppm by mass of europium (Eu);
- 2 to 9 ppm by mass of calcium (Ca);
- and
- a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass, wherein
- the amount of calcium (Ca) is a maximum of half that of europium (Eu), and a total addition amount of europium (Eu) and calcium (Ca) is a maximum of 25 ppm by mass.
Dependencies are inferred from the claim text.