1、CENELEC ENkb1*249-5- I 96 3404583 0379638 570 BRITISH STANDARD Materials for interconnection structures Part 5. Sectional specification set for conductive foils and films with and without coatings Section 1. Copper foils (for the manufacture of copper-clad base materials) The European Standard EN 61
2、249-51 : 1996 has the status of a British Standard ICs 31.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW . - - BS EN 61249-5-1 1996 IEC 1249-5-1 : 1995 CENELEC EN*bI*2Y7-5- I 96 3404583 0379639 407 Amd.No. The following BSI references relate to the work on this standard C
3、ommittee reference EPU52 Draft announced in BSI News I I Upate June 1996 BS EN 61249-5-1 : 1996 Date Text affected Committees responsible for this British Standard ! The preparation of this British standard was entrusted to Technical Committee EPU52, Printed circuits, upon which the following bodies
4、 were represented I British Telecommunications plc Electrical and Electronic Industries Association (BEAMA Ltd.) Federation of the Electronics Industries GAMBICA (BEAMA Ltd.) Institute of Metai Finishing National Supervisory Inspectorate Printed Circuit Interconnection Federation Surface Mount and R
5、elated Technologies (SMART Group) This British Standard, having been prepared under the direction of the Electrotechnicai Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1996 O BSI 1996 ISBN O 580 26167 O I - - CENELEC EN*bl*249-5- 96 3404
6、583 0379640 129 B BS EN 61249-5-1 : 1996 O BSI 1996 Contents Committees responsible National foreword Page Inside front cover ii Foreword Text of EN 61249-5-1 2 3 i CENELEC EN*bL*249-5- 1 96 3404583 0177641 Ob5 BS EN 61249-5-1 : 1996 National foreword This British Standard has been prepared by Techn
7、ical Committee EPL52 and is the English language version of EN 61249-5-1 : 1996, Materials for interconnection structures Part 5. Sectional speeifkation set for conductive foils and fm with and without coatings. Section 1. Copper foils flw the manufaeture of copper-clad base maten R = rolled copper
8、foil, with the grades given in table 1. CENELEC EN*bL*249-5- L 9b 3404583 OL79b45 700 El E2 E3 R1 R2 R3 Page 4 EN 61249-5-1 : 1996 Standard electrodeposited High ductility electrodeposited High temperature elongation electrodeposited As rolled wrought Light cold rolled wrought Annealed wrought Table
9、 1 - Types and grades of copper foil I I I Pm I TvDe desianation i I Type Grade designation 3.2 Types of surface profile In consideration of the processes used in the manufacturing of both electrodeposited and rolled copper, three designations for rough side profile are given in table 2. Ten point a
10、verage maximum height of profile (RZ) S L V Standard 14 Low profile 10 Very low profile 5 The ten points average height of irregularities corresponds to the term R, of IS0 4287-1 and is measured by the test method for R, described in future IEC 1189-2 1. 3.3 Bond enhancing treatment and passivation
11、A chemical or electrochemical surface treatment shall be applied to the copper foil to increase the bonding strength to the substrate. Such treatment may be applied to one or both sides. In case of one side treatment on electrodeposited copper foil it shall be applied to the rough side of the foil.
12、A chemical passivation shall be applied to bot:$ sides of the foil to increase its shelf life. 3.4 Complete designation For the designation of copper foils according to this specification the following code shall be used: At present at the stage of document 52/518/CDV (in preparation, see annex B).
13、* * zri Requirements For information only 1 Nominal mass Tolerance of Nominal thickness per unit area nominal mass per unit area gim2 % Pm 45 1 O 5 76 1 O 9 107 1 O 12 152 1 O 18 230 10 25 305 10 35 445 10 50 61 O 10 70 915 10 1 o5 1220 10 140 1525 10 175 1830 10 210 These specification shall not be
14、 applied to type R copper foil. CENELEC EN*bL*247-5- 3 76 3404583 0377646 647 Page 5 EN 61249-5-1 : 1996 Example: Thickness of foil in )un Foil ype Profile type Treatment on one side (2 = on both sides) If there is no risk of confusion, the designation may be abbreviated to read: CU-IEC-35E2-Sl. 4 M
15、ass per unit area and thickness The primary measure of quantity of copper foil shall be the mass per unit area, together with applicable tolerances. Thicknesses of copper foil corresponding to specified values of mass per unit area shall be regarded as given for information only. Table 3 - Mass per
16、unit area and thickness Mass per unit area shall be determined by the test method given in A.2.1. Direct thickness measurements on microsections result in incorrect values due to the irregularities caused by the treatment roughness. Page 6 EN 61249-5-1 : 1996 Mass Minimum IACS Maximum specimen per u
17、nit area conductivity resistance gim2 % m 45 88.5 25.0 76 90,5 15,O 1 07 92,14 10,4 152 94.12 7.1 230 95,05 4.7 305 96.60 3.5 445 96.60 2,4 61 O 96,60 1.7 915 96.60 12 1220 96,60 0.87 1525 96.60 0,70 1830 96.60 0,58 - 5 Copper purity Copper foils without treatment shall have the following minimum pu
18、rity (with silver content regarded as copper): Type E: 99,8 mass YO copper; Type R: 99,9 mass % copper. The copper content shall be determined after removal of the surface treatment or contamination by the test method given in A.2.2. 6 Electrical properties The minimum conductivity of copper foils i
19、s a percentage of that of the International Annealed Copper Standard (IACS) at 20 OC as given in table 4 and 5; 100 % corresponds to 0,5800 x 1 Oe a-l m-l minimum electrical conductivity or 1,7241 x 1 O-8 am maximum resistivity. The maximum specimen resistance of type E copper foils of different mas
20、s per unit area, when measured in accordance with the test method No. 2E12 described in future IEC 1189-2 *), shall have the values given in table 4. Table 4 - Electrical conductivity and specimen resistance of type E copper foils The maximum specimen resistance of type R copper foils of different m
21、ass per unit area, when measured in accordance with the test method No. 2E12 described in future IEC 1189-2 2), shall have the values given in table 5. 2, See annex B. Page 7 EN 61249-5-1 : 1996 1 O0 1 O0 1 O0 1 O0 1 O0 1 O0 1 O0 1 O0 Table 5 - Electrical conductivity and specimen resistance of type
22、 R copper foils I Mass l Minimum IACS Maximum specimen 43 3,4 23 1.7 1.1 0.84 0,67 0.56 resistance mQ conductivity % per unit area 45 76 107 152 1 O0 1 O0 1 O0 1 O0 22,5 13,4 9,6 6,7 230 305 445 61 O The maximum specimen resistances listed in tables 4 and 5 may be calculated using the following form
23、ula: where Rmax is the maximum specimen resistance (n); rmax is the maximum resistivity (f2m); p is the density of copper = 8,93 x 106 g/m3; I is the gauge length of the specimen (m); w is the width of the specimen (m); m is the mass per unit area (g/m2)(minimum value according to table 9). 7 Tensil
24、e properties Both in longitudinal direction (machine direction) and in transversal direction of the copper foils the tensile properties given in table 6 shall apply. Tensile strength and elongation shall be determined by the test method given in A.2.3. Page 8 I EN 61249-5-1 : 1996 I 8 Peel strength
25、The strength required to.peel the copper foil from the resin of the base material shall meet the values listed in the relevant specification of IEC 249 3) or shall be as agreed upon between purchaser and supplier. Peel strength shall be determined in accordance with one of the following test methods
26、 described in future IEC 1189-2 4): 2M06, 2M07, 2M13, 2M14, 2M15, 2M16 and 2M17. The test specimen shall be prepared from a copper foil sample of sufficient dimensions bonded to prepregs, reinforced resin sheets or adhesive-coated dielectric films under appropriate conditions. 9 Surface finish Both
27、sides of type E and type Fi copper foils shall be substantially free from resin tears, wrinkles, dirt, oil, corrosion or corrosion products, salts, grease, finger-prints or other blemishes which would adversely affect the quality of the copper-clad material to be made from the copper foil. Copper fo
28、il surfaces shall be free from regularly spaced and repeating patterns of pits and dents. There shall be no inclusions greater than 2,5 pm. Frequency and size of pinholes and pores shall be as given in table 7. The total area of all pinholes in an area of 0,5 m2 shall not exceed 0,012 mm2. The numbe
29、r of pores or pinholes shall be determined by the test method given in A.2.4. 9.1 Smooth side (shiny side) There shall be no scratches present on the smooth side of types E and R copper foils of a depth greater than 3,5 pm. The depth of surface roughness R, in longitudinal and transverse direction s
30、hall not exceed 3,5 pm. The term R, corresponds to the 10 point height of irregularities according to IS0 4287-1 and shall be measured by the test method for R, described in future IEC 1189-2. 3, The IEC 249 series will be replaced by the IEC 1249 series. 4, See annex B. x rn * CENELEC EN*bL*249-5-
31、II 96 3404583 0377650 078 Page 9 EN 61249-5-1 : 1996 Table 6 - Tensile strength and elongation (minimum values) Tensile strength at RT N/mm2 105 150 21 o 210 210 105 150 210 21 o 21 o 1 o5 150 210 210 210 350 350 350 350 350 180 to 350 180 to 350 180 to 350 1 o5 120 140 155 175 Elongation at RT % 2
32、23 3 3 3 at 180 OC at 180 OC N/mm2 I % Not specified 5 7,5 10 12.5 15 Not specified 2 2.5 3 3 3 130 135 140 155 175 2 23 3 3 3 0.5 0.5 0.5 0.5 1 ,o Not specified 0.5 - 10 0.5 - 10 1.0 - 20 Not specified Dependent on the annealing conditions applied, requirements shall be agreed upon between purchase
33、r and supplier. Page 10 EN 61249-5-1 : 1996 Maximum permitted number of pinholes and pores in an area of 300 mm x 300 mm Table 7 - Pinholes and pores in copper foils Maximum permitted size of pinholes (longest dimension) Clm Mass per unit area 50 or as agreed 50 or as agreed I 25 10 O I I I S 152 44
34、5 5 610 5 or as agreed 4 or as agreed 3 O O 9.2 Rough side (treatment side) The surface treatment on the rough side of types E and R copper foils shall be substantially uniform in colour and intensity within a roll or production lot and shall be sufficiently adherent to withstand normal handling dur
35、ing the manufacturing processes for laminates and printed boards. After removal by etching of the copper foil laminated to base material no more than traces of the treatment shall be left on the base material. No measurable changes in the properties of the laminate caused by the treatment shall occu
36、r. A certain disuniformity in colour of the treatment is allowed provided that there is no difference in properties of the copper-clad laminate between the areas showing the different colours of the treatment. 1 O Dimensions and tolerances 1 O. 1 Copper foil supplied in rolls The length and width of
37、 the rolls shall be as ordered. For the length of the rolls a tolerance of “0 % is permissible. For the width of the rolls the tolerances given in table 8 shall apply. Table 8 - Tolerances for width of copper foil delivered in rolls I Tolerance +l,O O up to 300 I O I over 300 up to 600 I I i3.0 O ov
38、er 600 I In any roll, there shall be no more than three splices and each of them shall be plainly indicated by a durable marker which extends approximately 5 mm beyond either end of the roll. CENELEC EN*bL*249-5- 3 96 3404583 0379652 940 Page 11 EN 61249-5-1 : 1996 Any hole larger than the maximum a
39、llowable size of pinholes shall be indicated by a flag, or the section containing the hole shall be removed with the two parts properly spliced and with the bonding join flagged. Copper foil supplied in rolls shall be evenly wound on cores of size and material agreed on between purchaser and supplie
40、r. Telescoping shall not exceed 12 mm from the core to the outer layer of the roll. 10.2 Copper foil supplied in sheets or cut panels The length and width of the sheets (cut panels) shall be as ordered. The tolerances shall be subject to agreement between purchaser and supplier. 11 Packaging and mar
41、king 1 1.1 Copper foil supplied in rolls Copper foil rolls shall be individually sealed in a waterproof material, so that the properties of the copper foil remain within the given requireme,nts for a period of 90 days after shipment. The sealed rolls shall be individually packed into durable cases.
42、11.2 Copper foil supplied in sheets or cut panels Copper foil sheets (cut panels) shall be sealed in a lubricant-free polymer film, so that the properties remain within the given requirements for a period of 90 days after shipment. The sealed sheets shall be placed on a suitable sturdy and smooth ba
43、se and shall be covered with a capping material of comparable stability and smoothness. The sheet content of the package shall be agreed between purchaser and supplier. 11.3 Marking of packages Each package or case shall be marked with the following information: - manufacturer; - manufacturers lot n
44、umber - type of copper foil; - information about surface profile and treatment; - nominal thickness (mass per unit area); - dimension (length and width of rolls or sheets); - annealing condition (only type R2); - number of sheets or cut panels (if supplied as such); - net mass of copper foil. Other
45、marking, such as the manufacturers lot number, the purchasers order number and order date, the date of shipment or similar details, may also be included as agreed between purchaser and supplier. CENELEC EN*b1*249-5- II 96 W 3404583 0177653 887 = Page 12 I EN 61249-5-1 : 1996 Annex A (normat ive) Sam
46、pling and test methods A.l Sampling One sample from each lot of five rolls or less shall be cut of (23 f 05) m from the free end with the free end of the sample marked for future identification. A.2 Test methods A.2.1 Mass per unit area A.2.1.1 Test specimens A minimum of three specimens shall be us
47、ed. The specimens shall be cut from the sample length, one specimen adjacent to the centre line and each of the other two specimens adjacent to each edge. The specimens shall be cut oversize sufficiently to permit accurate final cutting of either circular disks of (113 0,25) mm diameter or squares o
48、f (100 * 0,25) mm side length. A.2.1.2 Test apparatus and material The following apparatus and materials shall be used: - a balance having a resolution of 10 mg; - a cutter suitable for cutting copper foil. A.2.1.3 Procedure Each of the three specimens comprising a set shall be weighed on the balanc
49、e, and the mass recorded to the nearest 10 mg. The average mass of the specimens shall be calculated and shall fall within the range given in table 9. CENELEC EN*bL*2Y9-5- 3 96 3404.583 0379654 713 W Mass per unit area gim2 45 76 107 152 230 305 445 61 O 91 5 1 220 1 525 1 830 Page 13 EN 61249-5-1 : 1996 Allowable range of specimen mass g 0,41 - 0.50 0,69 - 0,84 0,96- 1.18 1,38 - 1.68 2,06 - 2,52 2,75 - 3,36 4.01 - 4,90 5.49 - 6.71 8,24 - 10,08 10.99 - 13,43 13.73 - 1 6,77 16,48 - 20,16 Table 9 - Mass per unit ar
