SN EN 1758 : 1998

Foreword
1 Scope
2 Normative references
3 Definitions
    3.1 Strip
    3.2 Lead frame
4 Designations
    4.1 Material
    4.2 Material condition
    4.3 Product
5 Ordering information
6 Requirements
    6.1 Composition
    6.2 Mechanical properties
    6.3 Technological properties
    6.4 Dimensions and tolerances
    6.5 Form tolerances
    6.6 Surface properties
    6.7 Edge stress
    6.8 Electrical conductivity
7 Sampling
    7.1 General
    7.2 Analysis
    7.3 Mechanical and other tests
8 Test methods
    8.1 Analysis
    8.2 Tensile test
    8.3 Hardness test
    8.4 Bend test
    8.5 Edge burr b
    8.6 Coil set
    8.7 Transverse cross bow q
    8.8 Twist alpha
    8.9 Roughness
    8.10 Solderability
    8.11 Edge stress
    8.12 Electrical resistivity or conductivity test
    8.13 Retests
    8.14 Rounding of results
9 Declaration of conformity and inspection documentation
    9.1 Declaration of conformity
    9.2 Inspection documentation
10 Marking, packaging, labelling
Annex A (informative) Physical properties
Annex B (informative) Bibliography
Annex C (normative) Lead fatigue test
Table 1 Composition of copper
Table 2 Composition of low alloyed copper alloys
Table 3 Mechanical properties
Table 4 Tolerances on thickness
Table 5 Tolerances on width
Table 6 Edgewise curvature c
Table 7 Edge burr b
Table 8 Coil set
Table 9 Transverse cross bow q
Table 10 Roughness
Table A.1 Physical properties

Defines the composition, property requirements and tolerances on dimensions and form for copper and copper alloy strip for lead frame material, not exceeding widths of 100 mm. Thicknesses between 0.1 mm and 1.0 mm are mainly used for stamped lead frames for integrated circuits and low power devices, and thicknesses between 1.0 mm and 2.0 mm are mainly for stamped lead frames for high power devices. Also defines sampling methods, test procedures for verifying conformity to standard requirements, and delivery conditions.