TAMURA SQ-20-49Lead Paste
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    SQ-20-49 Features:

    · This paste is the type that there is little occurrence of chip side balls

    · The defective conductivity by in-circuit tester will not occur

    · Having a good solderability, adequate wettability is shown on various parts

    · Stable printability is obtained with little change in viscosity during continuous printing

    SQ-20-49 Parameter:

    ItemsSQ-20-49Test methods 
    Alloy compositionSn62.8/Pb36.8/Ag0.4JIS Z 3282(1986)
    Melting point179~183℃According to DSC measurement
    Particle size of solder15-41μmAccording to laser diffraction method 
    Shape of solder powderSphericalJIS Z 3284(1994)
    Flux content9.8%JIS Z 3284(1994)
    Chlorine content 0.19%JIS Z 3197(1999)
    Viscosity180Pa・s

    JIS Z 3284(1994) 

    Viscometer, type PCU, manufactured by Malcom at 25℃


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