TATSUTA Electric Wire & Cable Co., Ltd.

Business Units

Copper Wire

Cost saving alternative to gold wire.

The recent sharp rise in gold prices has led to a full-scale spread of lower-cost copper wire mainly outside of Japan. TATSUTA has taken on the challenge of developing copper wire for increasingly sophisticated and complicated applications. Mainly in automotive applications, use of TATSUTA copper wire is growing, from small pin count discrete packaging to high pin count pin ICs.

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Product information

Highly Pure Copper TypeTC-A
  • Lower cost compared to gold wire.
  • Superior long-term reliability compared to gold wire, making it suitable for automotive IC applications.
  • Better conductivity than gold wire, making it ideal for higher speeds in LSIs and as a remedy for heat radiation.
  • Due to the use of highly pure (6N) copper with few contaminants, the initial ball is soft and it is more resistant to chip damage.
  • Excellent second and subsequent bonding results from oxygen-free (4N) copper material.
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4N Copper Type TC-E / TC-ER
  • Lower cost compared to highly pure copper (6N) with excellent cost performance
  • Compared to highly pure copper (6N), this material is stronger, with superior roundness properties of the ball bond.
  • Superior long-term reliability compared to gold wire, making it suitable for automotive IC applications.
  • Better conductivity than gold wire, making it ideal for higher speeds in LSIs and as a remedy for heat radiation.
  • More stability in FAB forming due to minute amounts of additives (TC-ER)
Copper Alloy TypeMCXE (for fine pitch applications)
  • Enables stable FAB forming because of its single melting point structure.
    (compared to the Pd-Cu wire)
  • Superior small ball roundness, because the FAB is a hyperfine crystal.
  • High strength and high elongation realized as a result of the hyperfine crystals in the wire.
    Highly resistant to wire sweep and neck damage, it enables the forming of a variety of long and short loops.
Example of use
FAB
For inquiries about Bonding Wire
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