TAMAC Series｜Products information｜Copper & Copper Alloy Products MITSUBISHI MATERIALS

Cu-Fe alloy

TAMAC Series

C19400 (TAMAC194)

High current

Main applications

TAMAC194:lead frame for IC(LED,In-vehicle microcomputer), bus bars, fuse terminals, pin(male) terminals and the like
TAMAC4:Power IC lead frame, bus bar material, fixing piece for relay

plate
strip
bar
wire
ball

TAMAC series are applied to electronic parts, have excellent characteristics as lead frame materials for semiconductors, and furthermore, have been improved to a high added value copper alloy in response to user needs.

Positioning map

The TAMAC series are Cu-Fe-P type copper alloys and have been used for electronic materials for many years. Mitsubishi Materials has promoted alloy development and prepared a wide variety of variations in order to realize high conductivity (for power semiconductor and bar applications) and high strength (lead frame, clip terminal, and the like) with respect to the required characteristics of electronic parts.

TAMAC194

TAMAC 194 is a representative copper alloy that is used for IC lead frames, bus bars, and civil spring parts in terms of the excellent balance between the strength and the conductivity, the heat resistance, the press workability, and the bending workability.

Positioning of Alloy

TAMAC 194 is widely used for the lead frames, and has ESH with improved high strength and elongation, which is obtained by arranging the manufacturing method so as to be compatible with highly integrated and advanced IC. The quality obtained by precision rolling technology boasts the world's top class.

Main features

Both strength and conductivity are balanced at a high level
Excellent stamping properties
Excellent heat resistance
Excellent resistance to stress in corrosion cracking
Available ESH material with high strength and improved elongation
Excellent plating and etching properties due to fine precipitates
Possible to process reflow-Sn plating with excellent surface quality and whisker resistance

Chemical composition

The chemical components of TAMAC194 are as follows.

(Weight %)

Fe	Zn	P	Cu
2.3	0.12	0.03	Rem.

* Including inevitable impurities and trace additive elements

Physical properties

The physical properties of TAMAC194 are as follows.

(Weight %)

Property	Representative Value
Specific Gravity (293K)	8.8
Coefficient of Thermal Expansion (×10^-6/K：293～573K）	17.6
Thermal Conductivity (W/(m・K)：293K)	262
Volume Resistivity (μΩm：293K)	0.026
Electrical Conductivity （%IACS:293K）	66
Modulus of Elasticity （kN/mm²:293K)	121

TAMAC4

TAMAC 4 is widely used for the power semiconductor lead frames due to its high conductivity and heat dissipation properties, and is highly reliable as a general copper alloy for high current applications such as bus bar material and fixing piece for relays.

Positioning of Alloy

The electrical conductivity of TAMAC4 is as high as 90%IACS, which is equivalent to one of pure copper. TAMAC4 has been widely applied for the whole electrical parts, power semiconductors and busbars which require high current and high voltage.

Main features

Electricity and thermal conductivity are extremely good. (Conductivity 90%: IACS average)
It has about 20% higher strength than pure copper
Excellent heat resistance
Excellent resistance to stress corrosion cracking
Possible to process reflow-Sn plating with excellent surface quality and whisker resistance

Chemical composition

The chemical components of TAMAC4 are as follows.

(Weight %)

Fe	P	Cu
0.1	0.03	Rem.

* Including inevitable impurities and trace additive elements

Physical properties

The physical properties of TAMAC4 are as follows.

Property	Representative Value
Specific Gravity (293K)	8.8
Coefficient of Thermal Expansion (×10^-6/K：293～573K）	17.6
Thermal Conductivity (W/(m・K)：293K)	347
Volume Resistivity (μΩm：293K)	0.0192
Electrical Conductivity （%IACS:293K）	90
Modulus of Elasticity（kN/mm²:293K）	118

Mechanical properties

	Temper
	1/4H	1/2H	H	EH
Tensile Strength (N/mm²)	275～355	295～375	335～410	375Min.
Elongation (%)	20Min.	10Min.	5Min.	-
Vickers Hardness^※ (HV)	90～115	100～125	110～135	115Min.

* For reference

Bending workability

The bending workability of TAMAC4 is as follows.

Temper	Sampling Direction (to the rolling direction)	Bending Inside Radius (mm) R						Evaluation
Temper	Sampling Direction (to the rolling direction)	0.0	0.125	0.2	0.25	0.4	0.6	R/t
1/2H （Thickness: 0.40mm）	0°:(Good Way)	△	△	△	○	○	○	0.0
1/2H （Thickness: 0.40mm）	90°:(Bad Way)	△	△	△	△	○	○	0.0
H （Thickness: 0.25mm）	0°:(Good Way)	▲	△	△	○	○	○	0.5
H （Thickness: 0.25mm）	90°:(Bad Way)	▲	△	△	○	○	○	0.5

Method of evaluation: ◎Good (Acceptance)、○Minor rough surface (Acceptance)、△Major rough surface (Acceptance)、▲Minor crack (Rejection)、××Major crack (Rejection)