EN 1758

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1758:1998 Incorporating Corrigendum No. 1 The European Standard EN 1758:1997 has the status of a British Standard ICS 77.150.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Copper and copper alloys Ð Strip for lead frames This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1998  BSI 1998 ISBN 0 580 29462 5 BS EN 1758:1998 Amendments issued since publication Amd. No. Date Text affected 10197 Corr. No. 1 September 1998 Indicated by a sideline in the margin || National foreword This British Standard is the English language version of EN 1758:1997 published by the European Committee for Standardization (CEN). The UK participation in its preparation was entrusted by Technical Committee NFE/34, Copper and copper alloys, to Subcommittee NFE/34/1, Wrought and unwrought copper and copper alloys, which has the responsibility to: ± aid enquirers to understand the text; ± present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; ± monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. CEN European Committee for Standardization Comite EuropeÂen de Normalisation EuropaÈisches Komitee fuÈ r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels  1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1758:1997 E EUROPEAN STANDARD EN 1758 NORME EUROPE ENNE EUROPAÈ ISCHE NORM December 1997 ICS 77.150.30 Descriptors: Copper, copper alloys, rolled products, steel strips, integrated circuits, electronic components, designation, materials, dimensions, dimensional tolerances, mechanical properties, surface properties, chemical composition, roughness, marking English version Copper and copper alloys Ð Strip for lead frames Cuivre et alliages de cuivre Ð Bandes pour grilles de composants (lead frames) Kupfer und Kupferlegierungen Ð BaÈnder fuÈr SystemtraÈger This European Standard was approved by CEN on 6 November 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 1758:1997  BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 133, Copper and copper alloys, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 1998, and conflicting national standards shall be withdrawn at the latest by June 1998. Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 2, Rolled flat products, to prepare the following standard: EN 1758, Copper and copper alloys Ð Strip for lead frames. This is one of a series of European Standards for copper and copper alloy rolled flat products. Other products are, or will be, specified as follows: EN 1172, Copper and copper alloys Ð Sheet and strip for building purposes. EN 1652, Copper and copper alloys Ð Plate, sheet, strip and circles for general purposes. EN 1653, Copper and copper alloys Ð Plate, sheet and circles for boilers, pressure vessels and hot water storage units. EN 1654, Copper and copper alloys Ð Strip for springs and connectors. Copper and copper alloys Ð Copper plate, sheet and strip for electrical purposes. (WI: 00133022) This standard gives information, which might be useful to the user, on physical properties of the product contained in annex A. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 3.1 strip 3 3.2 lead frame 3 4 Designations 3 4.1 Material 3 4.2 Material condition 4 4.3 Product 4 Page 5 Ordering information 5 6 Requirements 5 6.1 Composition 5 6.2 Mechanical properties 5 6.3 Technological properties 6 6.4 Dimensions and tolerances 6 6.5 Form tolerances 6 6.6 Surface properties 9 6.7 Edge stress 9 6.8 Electrical conductivity 9 7 Sampling 9 7.1 General 9 7.2 Analysis 10 7.3 Mechanical and other tests 10 8 Test methods 10 8.1 Analysis 10 8.2 Tensile test 10 8.3 Hardness test 10 8.4 Bend test 10 8.5 Edge burr b 10 8.6 Coil set 10 8.7 Transverse cross bow q 10 8.8 Twist a 10 8.9 Roughness 10 8.10 Solderability 10 8.11 Edge stress 10 8.12 Electrical resistivity or conductivity test 12 8.13 Retests 12 8.14 Rounding of results 12 9 Declaration of conformity and inspection documentation 12 9.1 Declaration of conformity 12 9.2 Inspection documentation 12 10 Marking, packaging, labelling 12 Annex A (informative) Physical properties 13 Annex B (informative) Bibliography 13 Annex C (normative) Lead fatigue test 13 Table 1 Ð Composition of copper 3 Table 2 Ð Composition of low alloyed copper alloys 3 Table 3 Ð Mechanical properties 4 Table 4 Ð Tolerances on thickness 6 Table 5 Ð Tolerances on width 6 Table 6 Ð Edgewise curvature c 7 Table 7 Ð Edge burr b 7 Table 8 Ð Coil set 8 Table 9 Ð Transverse cross bow q 9 Table 10 Ð Roughness 9 Table A.1 Ð Physical properties 13 Page 3 EN 1758:1997  BSI 1998 Table 1 Ð Composition of copper Material designation Composition % (m/m) Element Cu1) Bi P Pb Other elements (see note) Symbol Number Total Excluding Cu-DLP CW023A min. 99,90 Ð 0,005 Ð Ð Ag, Ni, P max. Ð 0,0005 0,013 0,005 0,03 1) Including Ag, up to a maximum of 0,015 %. NOTE. The total of other elements (than copper) is defined as the sum of Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te and Zn, subject to the exclusion of any individual elements indicated. Table 2 Ð Composition of low alloyed copper alloys Material designation Composition in % (m/m) Element Cu Fe Ni P Pb Sn Zn Others Total Symbol Number CuFe2P CW107C min. Rem 2,1 Ð 0,015 Ð Ð 0,05 Ð max. Ð 2,6 Ð 0,15 0,03 Ð 0,20 0,2 CuSn0,15 CW117C min. Rem. Ð Ð Ð Ð 0,10 Ð Ð max. Ð 0,02 0,02 0,015 Ð 0,15 0,10 0,10 1 Scope This European Standard specifies the composition, property requirements and tolerances on dimensions and form for copper and copper alloy strip for lead frame material, with widths up to and including 100 mm. Thicknesses from 0,1 mm up to and including 1,0 mm are generally used for stamped lead frames for integrated circuits and low power devices and thicknesses from 1,0 mm up to and including 2,0 mm are generally used for stamped lead frames for high power devices. The sampling procedures, the methods of test for verification of conformity to the requirements of this standard, and the delivery conditions are also specified. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 1655, Copper and copper alloys Ð Declarations of conformity. EN 10002-1, Metallic materials Ð Tensile testing Ð Part 1: Method of test (at ambient temperature). EN 10204, Metallic products Ð Types of inspection documents. ISO 1811-2, Copper and copper alloys Ð Selection and preparation of samples for chemical analysis Ð Part 2: Sampling of wrought products and castings. ISO 4287-1, Surface roughness Ð Terminology Ð Part 1: Surface and its parameters. ISO 6507-2, Metallic materials Ð Hardness test Ð Vickers test Ð Part 2: HV 0,2 to less than HV 5. ISO 6507-3, Metallic materials Ð Hardness test Ð Vickers test Ð Part 3: Less than HV 0,2. ISO 7438, Metallic materials Ð Bend test. ISO 7799, Metallic materials Ð Sheet and strip 3 mm thick or less Ð Reverse bend test. HD 323.2.20 S3, Environmental testing Ð Part 2: Tests Ð Test T: Soldering. NOTE Informative references to documents used in the preparation of this standard, and cited at the appropriate places in the text, are listed in a bibliography, see annex B. 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 strip flat rolled product of rectangular cross-section with uniform thickness from at least 0,10 mm, supplied as level wound coils usually with slit edges; the thickness does not exceed one tenth of the width 3.2 lead frame part which has been stamped or etched from a strip for assembling, carrying and effecting the electrical connections of semi-conductor components 4 Designations 4.1 Material 4.1.1 General The material is designated either by symbol or number (see Tables 1 and 2). Page 4 EN 1758:1997  BSI 1998 || || | Table 3 Ð Mechanical properties Designation Nominal thickness Tensile strength Rm Elongation A50 mm Hardness HV Material Material condition mm N/mm2 % From Up to and including Symbol Number min. max. min. min. max. Cu-DLP CW023A R240*) 0,10 2,0 240 300 8 Ð Ð H065*) Ð Ð Ð 65 95 R290 0,10 2,0 290 360 4 Ð Ð H090 Ð Ð Ð 90 110 R360 0,10 1,0 360 Ð 2 Ð Ð H110 Ð Ð Ð 110 Ð CuFe2P CW107C R370*) 0,10 2,0 370 430 6 Ð Ð H120*) Ð Ð Ð 120 140 R420 0,10 2,0 420 480 3 Ð Ð H130 Ð Ð Ð 130 150 R470 0,10 1,0 470 530 Ð Ð Ð H140 Ð Ð Ð 140 160 R520 0,10 1,0 520 580 Ð Ð Ð H150 Ð Ð Ð 150 170 CuSn0,15 CW117C R250*) 0,10 2,0 250 320 9 Ð Ð H060*) Ð Ð Ð 60 90 R300 0,10 2,0 300 370 4 Ð Ð H085 Ð Ð Ð 85 110 R360 0,10 2,0 360 430 3 Ð Ð H105 Ð Ð Ð 105 130 R420 0,10 1,0 420 490 2 Ð Ð H120 Ð Ð Ð 120 140 *) See Table 8. NOTE 1 N/mm2 is equivalent to 1 MPa. 4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1190-1. NOTE Although material symbol designations used in this standard might be the same as those in other standards using the designation system given in ISO 1190-1, the detailed composition requirements are not necessarily the same. 4.1.3 Number The material number designation is in accordance with the system given in EN 1412. 4.2 Material condition For the purposes of this standard, the following designations, which are in accordance with the system given in EN 1173, apply for the material condition. ± R: Material condition designated by the minimum value of tensile strength requirement for the product, with mandatory tensile strength and elongation requirements; ± H: Material condition designated by the minimum value of hardness requirement for the product, with mandatory hardness requirements. Exact conversion between material conditions designated R and H is not possible. Material condition is designated by only one of the above designations. 4.3 Product The product designation provides a standardized pattern of designation from which a rapid and unequivocal description of a product is conveyed in communication. It provides mutual comprehension at the international level with regard to products which meet the requirements of the relevant European Standard. The product designation is no substitute for the full content of the standard. The product designation for products to this standard shall consist of: ± denomination (strip); ± number of this European Standard (EN 1758); ± material designation, either symbol or number (see Tables 1 and 2); ± material condition designation (see Table 3); ± nominal dimensions (thickness 3 width). The derivation of a product designation is shown in the following example. Page 5 EN 1758:1997  BSI 1998 EXAMPLE: Strip conforming to this standard, in material designated either CuFe2P or CW107C, in material condition H120, nominal thickness 0,254 mm, nominal width 59,63 mm, shall be designated as follows: Strip EN 1758 2 CuFe2P 2 H120 2 0,254 3 59,63; or Strip EN 1758 ± CW107C ± H120 ± 0,254 3 59,63 Denomination Number of this European Standard Material designation Material condition designation Nominal dimensions in millimetres 5 Ordering information In order to facilitate the enquiry, order and confirmation of order procedures between the purchaser and the supplier, the purchaser shall state on his enquiry and order the following information: a) quantity of product required (mass); b) denomination (strip); c) number of this European Standard (EN 1758); d) material designation (see Tables 1 and 2); e) material condition designation (see 4.2 and Table 3); f) nominal dimensions (thickness3width); g) coil size requirements: nominal inside diameter, in millimetres, and maximum outside diameter, in millimetres, and either maximum mass, in kilograms, or approximate specific coil weight (mass per width) in kilograms per millimetre. NOTE 1 It is recommended that the product designation as described in 4.3, is used for items b) to f). In addition, the purchaser shall also state on the enquiry and order any of the following, if required: h) whether a 908 bend test according to ISO 7438 is required (see 6.3); if so, the acceptance criteria required; i) whether a reverse bend test according to ISO 7799 is required (see 6.3); if so, the dimensions, alignment of the test piece to the rolling direction of the strip, the tensile load and the acceptance criteria required; j) whether a lead fatigue test according to annex C is required (see 6.3); if so, the acceptance criteria required; k) whether edgewise curvature shall be measured over a length of 2 000 mm (see 6.5.1); l) whether there is a requirement for limitation of coil set for strip thicknesses over 0,5 mm (see 6.5.3.1); m) whether there is a requirement for limitation of twist (see 6.5.3.3); n) which measuring device is to be used for the determination of transverse cross bow (see 8.7); o) whether the solderability test according to HD 323.2.20 S3 is required (see 6.6.3); p) whether there is a requirement for limitation of edge stress (see 6.7); if so, the acceptance criteria required; NOTE 2 The details of the test method and the acceptance criteria should be agreed between the purchaser and the supplier. q) whether there is a requirement for minimum electrical conductivity (see 6.8); if so, the acceptance criteria required and the test method if it is not to be left to the discretion of the supplier; r) whether a declaration of conformity is required (see 9.1.); s) whether an inspection document is required, and if so which type (see 9.2); t) whether there are any special requirements for marking, packaging or labelling (see clause 10). EXAMPLE Ordering details for 1 500 kg strip conforming to EN 1758, in material designated either CuFe2P or CW107C, in material condition H120, nominal thickness, 0,254 mm, nominal width, 59,63 mm, with nominal inside diameter of coil, 400 mm, maximum outside diameter of coil, 915 mm, approximate specific coil weight (mass per width), 4,0 kg/mm: 1 500 kg strip EN 1758 ± CuFe2P2 H1202 0,2543 59,63; ± nominal inside diameter of coil: 400 mm; ± maximum outside diameter of coil: 915 mm; ± approximate specific coil weight: 4,0 kg/mm; or 1 500 kg strip EN 1758 ± CW107C2 H1202 0,2543 59,63; ± nominal inside diameter of coil: 400 mm; ± maximum outside diameter of coil: 915 mm; ± approximate specific coil weight: 4,0 kg/mm. 6 Requirements 6.1 Composition The composition shall conform to the requirements for the appropriate material given in Tables 1 and 2. NOTE These materials have been taken into account as being the most common materials in Europe and meeting the guidelines of CEN/TC 133 for the standardization of materials. 6.2 Mechanical properties The mechanical properties shall conform to the appropriate requirements given in Table 3. The tests shall be carried out in accordance with either 8.2 (tensile) or 8.3 (hardness). Page 6 EN 1758:1997  BSI 1998 Table 4 Ð Tolerances on thickness Dimensions in millimetres Nominal thickness Tolerance on thickness Over Up to and including 0,11) 0,3 ±0,008 0,3 0,5 ±0,010 0,5 0,8 ±0,013 0,8 1,0 ±0,015 1,0 1,5 ±0,020 1,5 2,0 ±0,025 1) Including 0,1. Table 5 Ð Tolerances on width Dimensions in millimetres Nominal thickness Tolerance on width for nominal widths From 15 up to and including 55 Over 55 up to and including 100Over Up to and including 0,11) 0,5 0 +0,10 0 +0,15 0,5 1,0 0 +0,15 0 +0,20 1,0 2,0 0 +0,30 0 +0,40 1) Including 0,1. 1) measuring length 2) strip width Figure 1 Ð Edgewise curvature c 6.3 Technological properties Strip shall be tested in accordance with the method(s) selected from those given in 8.4 when requested by the purchaser [see 5h), 5i) and 5j)] and shall meet the acceptance criteria agreed between the purchaser and the supplier. 6.4 Dimensions and tolerances Strip shall conform to the tolerances given in Tables 4 and 5. 6.5 Form tolerances 6.5.1 Edgewise curvature c For the straightness of the longitudinal edge, which unless otherwise agreed between the purchaser and the supplier shall be based on a measuring length of 1 000 mm, the edgewise curvature c (see Figure 1) shall not exceed the values given in Table 6. If the purchaser and the supplier agree on a measuring length of 2 000 mm, the edgewise curvature c shall not exceed the values given in Table 6 multiplied by 4. 6.5.2 Edge burr b The height of edge burrs (see Figure 2) shall not exceed the values given in Table 7. Height of edge burr b = x2 t where: x is the height of edge burr measured from the opposite side of the strip; t is the thickness. Page 7 EN 1758:1997  BSI 1998 Table 6 Ð Edgewise curvature c Dimensions in millimetres Nominal width Edgewise curvature c for nominal thicknesses1) Over Up to and including From 0,1 up to and including 0,3 max. Over 0,3 up to and including 1,0 max. Over 1,0 up to and including 2,0 max. 152) 24 1,8 2,5 4,0 24