High purity copper (5N, 6N, 7n)
Quality:
Cu：99.999%-99.99999%
model:
High purity copper plate
High purity copper particles
High purity copper ingot
High purity copper wire
Performance:
6N, 7n ultra-high purity copper contains very few impurities, and its product has small grain boundary area and few lattice defects, which can replace the gold bonding wire as a semiconductor.
1. Low resistivity: using standard conductor at 4.2K, the resistance of 6N copper is 2.3 × 10-12 Ω m, while that of 4N copper is 1.1 × 10-10 Ω M. The conductivity of 6N copper is about 20 times higher than that of 4N copper at very low temperature.
2. Good thermal conductivity: ultra high pure copper has high thermal conductivity at very low temperature. The thermal conductivity of 6N copper is 3.0 × 104w / MK at 18K, and that of 4N copper is 3.1 × 103w / MK at 18K.
3. Good ductility: 6N copper has excellent processability, which can be drawn into copper wire with diameter of 20 μ m to 30 μ m, or pressed into thin copper foil. The brittleness of low sulfur 6N copper disappears from 600k to 700k.
4. Low softening temperature: 6N copper softens at 350 K, 6N copper can be easily drawn into 20-30 micron thin wires, while 4N copper softens at 440 K.
Application:
It is used in integrated circuit (semiconductor chip), flat panel display, thin film solar cell, information storage and transmission of electronic information industry.