公开(公告)号：US08444774B2

公开(公告)日：2013-05-21

申请号：US12731369

申请日：2010-03-25

申请人： Eric Duschesne ,  Kang-Wook Lee ,  Valerie Oberson

发明人： Eric Duschesne ,  Kang-Wook Lee ,  Valerie Oberson

IPC分类号： B23K35/34

CPC分类号： B23K35/362 ,  Y10T428/12493

摘要： The invention relates to a composition of matter comprising a soldering flux, wherein the flux consists essentially of a combination of a fluxing agent and a solvent, and wherein the fluxing agent comprises a keto acid such as levulinic acid or acetylbutyric acid. The flux may also comprises an ester acid, or comprises a mixture of the keto acid with the ester acid. The solvent comprises a mixture of a tacky solvent with a non-tacky solvent. The invention also relates to a process comprising soldering at least two surfaces together, each of which comprises a metal area to which solder can adhere by employing the following steps in any order: applying solder to at least one of the metal areas, aligning the metal areas so that they are superimposed over one another, heating at least one of the areas to a temperature that comprises at least the melting temperature of the solder. The last step comprises joining the superimposed areas to one another. The process employs the flux composition operatively associated with the solder, and in one embodiment the invention comprises a mixture of the flux composition with powdered solder. In another embodiment, the process comprises IMS, C4 and C4NP processes and the solder comprises a lead free solder. The invention also comprises a product produced by the foregoing process or processes.

摘要翻译： 本发明涉及包含助焊剂的物质组合物，其中助熔剂基本上由助熔剂和溶剂的组合组成，并且其中助熔剂包括酮酸，例如乙酰丙酸或乙酰基丁酸。 助熔剂还可以包含酯酸，或包含酮酸与酯酸的混合物。 溶剂包括粘性溶剂与非粘性溶剂的混合物。 本发明还涉及一种方法，其包括将至少两个表面焊接在一起，每个表面包括金属区域，焊料可以以任何顺序通过以下步骤粘附到该金属区域：将焊料施加到至少一个金属区域，使金属对准 区域，使得它们彼此叠加，将至少一个区域加热至至少包括焊料的熔化温度的温度。 最后一步包括将叠加的区域相互连接。 该方法使用与焊料可操作地相关联的助熔剂组合物，并且在一个实施方案中，本发明包括焊剂组合物与粉末焊料的混合物。 在另一个实施方案中，该方法包括IMS，C4和C4NP方法，焊料包括无铅焊料。 本发明还包括通过前述方法或方法生产的产品。