High Strength and High Conductivity Copper Alloy SuperKFC™
Enhanced characteristics superior to the original KFC™
CDA No.19240
SuperKFC™ is a precipitation-hardened copper alloy with fine iron-phosphorus intermetallic compounds in the matrix, formed by adding iron and phosphorus to copper, in a similar manner to the original KFC™. With increased amounts of iron and phosphorus content, this product achieves both higher strength and higher electrical conductivity than the original by employing the process metallurgy approach. SuperKFC™ offers properties comparable to or higher than C19400 but contains a smaller amount of iron content, enabling higher yield rate, direct bear wire-bonding, and improved surface conditions, and lowering overall manufacturing costs.
Features
- High electrical and thermal conductivity, and higher electrical conductivity than C19400
- High strength and high electrical conductivity. Available for a variety of applications. (Temper ESH)
- Free of smut contamination during pre-plating process and etching process.
- Excellent stamping formability and etching formability
- Excellent bondability for gold and copper wires
- Excellent platability for a variety of metals, such as Ag, Ni, Sn, solder, etc., achieving high Ag-plating reflection required for high-luminosity LED leadframes
- Excellent solderability
Applications
- Leadframes for QFP and QFN packages
- Inner-frame for heat spreader, etc.
Nominal Compositions
Cu-0.3Fe-0.1P (mass%)
Characteristics
Physical Properties
| Specific Gravity | 8.9 |
|---|---|
| Coefficient of Thermal Expansion (293～573K) | 17.5 x 10-6/K |
| Thermal Conductivity (293K) | 311 W/m.K（Temper H 337W/m.K） |
| Electrical Resistivity (293K) | 22.1 nΩ .m（Temper H 20.3nΩ .m ） |
| Electrical Conductivity (293K) | 78 %IACS(Temper H 85%IACS) |
| Modulus Elasticity (293K) | 122 GPa |
- *Note: The above are typical characteristics.
Mechanical Properties
| Temper | Tensile Strength MPa |
Elongation % |
Vickers Hardness MHv: 4.9N |
|---|---|---|---|
| H | 430–530 | 3 min | 130–160 |
| ESH | 500–600 | 3 min | 150–180 |
- *Note: The above tensile strength and hardness are standard specifications. Technical specifications will be determined according to consumer requests.
90°V-Type Bend-Formability (MBR)
| Temper | Good Way | Bad Way |
|---|---|---|
| H | 0.5 | 1.0 |
| ESH | 1.0 | 1.5 |
- *Note: The above are typical characteristics. The value slightly varies depending on the thickness of specimens.
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