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High Strength and High Conductivity Copper Alloy SuperKFC™
CDA No. 19240 The characteristic of original KFC™ has been brushed up.
SuperKFC™ has small amount of iron and phosphorus in chemical compositions, and is hardened by Fe2P precipitates in copper matrix like original KFC™ . The content of iron and phosphorus is higher than original, and consistent high strength and high electrical conductivity with the concept of process metallurgy. SuperKFC™ has a properties equivalent to C19400 or more, and low content of iron compare with C19400 promising the improvement of yield rate, direct bear wire-bonding and surface condition improvement.
SuperKFC™ is the alloy which has a potential to reduce the cost of your production.
Good Points
- Has high electrical and thermal conductivity. Has higher electrical conductivity than C19400.
- Has high strength with high electrical conductivity. It can be used for various uses. (Temper ESH)
- Has good stamping formability and etching formability.
It reduce the smut contamination by etching process or pre-plating process. - Has good solderability and platability.
Can achieve higher Ag-plating reflection required for leadframe of high-luminosity LED. - Has good bare bondability by gold wire and copper wire. Also applicable for direct bear wire-bonding without plating.
Nominal Compositions
Cu-0.3Fe-0.1P (mass%)
Characteristics
Fig. Softening Resistance of
SuperKFC™
1. 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 |
* The above are typical characteristics.
2. 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 |
* The above tensile strength and hardness are our standard specifications. We will adjust these specifications by your requests.
3. 90°V-type Bend-formability (MBR)
| Temper | Good Way |
Bad Way |
|---|---|---|
| H | 0.5 | 1.0 |
| ESH | 1.0 | 1.5 |
* The above are typical characteristics.
The value slightly varies depending on the thickness of specimens.
Use
Leadframe for QFP, QFN package, Leadframe for LED, Inner-frame for Heat spreader etc.
Others
Not used cadmium (Cd), lead (Pb), mercury (Hg), six value chrome (Cr+6), polybrominated biphenyl (PBB), Polybrominated biphenyl ether (PBDE) restricted with RoHS etc.
Kobe Steel, Ltd. Advanced Materials Business
Copper Rolled Products Unit
Copper Flat Rolled Products Sales Department
