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SMT applications. It is a homogeneous mixture of the highest quality pre-alloyed solder powders and stable resins paste flux. With a special blend of gelling additives in this formulation, it prevents segregation of solder cream and provides a creamy mixture ready for application. The residue from This specification covers the solder paste NC-559-AS; 89.5-90.5% for stencil printing and 87% for dispensing in interconnection of surface mount devices. Solder Alloys: Sn63/Pb37; Sn62/Pb36/Ag2; Sn96.5/Ag3.5; Sn10/Pb88/Ag2; Sn95/Sb5; Sn43/Pb43/Bi14 Melting Temperatures: Sn63/Pb37: 183C; Sn62/Pb36/Ag2: 179C; Sn96.5/Ag3.5: 221C; Sn10/Pb88/Ag2: 268-290C: Sn95/Sb5: 235-240C; Sn43/Pb43/Bi14: 144-163C Appearance: Homogenous dark gray cream, no separated flux Flux Content (wt %): Printing Applications 9.5-10.5% +/-1%: Dispensing Applications 13% +/-1% Tested according to IPC-TM-650 2.2.20 Viscosity: Printing Applications, T2,T2A 750Kcps +/-10% T3 800Kcps +/-10% T4 850Kcps +/-10%; Dispensing Applications, T2,T2A 400Kcps +/-10% T3 425Kcps +/-10% T4 450Kcps +/-10%. Tested according to IPC-TM-650 2.4.34 and 2.4.34.2 Grain Size: T2, -200/+325, 75-45microns; T2A, -270/+400, 53-38microns; T3, -325/+500, 45-25 microns; T4, -400/+500, 38-25 microns, T5, -500/+635, 25-20 microns Tested according to IPC-TM-650 2.2.14 and 2.2.14.2 Particle Sphericity: 99% of the powder spheres exceed 80% roundness factor. Chlorine Content in Flux (%): Pass – IPC-TM-650 2.3.33, Less than 2.5 mg/in2 via Ion Chromatography. Copper Mirror: MO as classified by IPC-TM-650 2.3.32 Insulation Resistance: Greater than 1x10-11 after humidity exposure. Tested according to IPC-TM-650 2.6.3.3 Reflow Property: The paste shall coalesce into one button with no visible discoloration. Report contains metal percent, viscosity, wetting and solder ball tests. A detailed chemical analysis of the alloy is also available. Available in 35, 100 gram syringes; 250,500,600 gram jars; 700, 1200 gram cartridges; and 750 gram DEK Pro-Flow cassettes. Amtech certifies that when stored properly the material will meet all specifications for 6 months from the date of manufacture. For FreshMix, it will last for 24 months from packaging date. Proper storage: Premix 38-44F, allow material to warm up to ambient temperature before opening; FreshMix, do not store above 75F. (We do not proofread any ads submitted by members) |
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