Flux
    6.
    发明申请
    Flux 审中-公开

    公开(公告)号:US20180257182A1

    公开(公告)日:2018-09-13

    申请号:US15760818

    申请日:2016-09-15

    CPC classification number: B23K35/3613 C08G59/42

    Abstract: Provided is a flux, flux residue of which keeps a predetermined viscosity during reflow and after a reflow step without hindering wettability of a solder alloy, the flux being compatible with an underfill in an underfill hardening step. The flux contains a thermosetting resin, a hardening agent, an organic acid and a solvent in which the flux contains 3% or more by mass to 8% or less by mass of the resin, 1% or more by mass to 5% or less by mass of the hardening agent to remain within a limit of an additive amount of the resin, 5% or more by mass to 15% or less by mass of the organic acid and a remainder of the solvent.

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