Invention Grant
US07767032B2 No-clean low-residue solder paste for semiconductor device applications 有权
用于半导体器件应用的无清洁低残留焊膏

No-clean low-residue solder paste for semiconductor device applications
Abstract:
A no-clean low residue solder paste is described for die-attach dispensing or fine pitch printing of semiconductor devices. The solder paste has a homogeneous consistency with no tendency to paste separation. The ultimately remaining residue is clear and crystal like and is compatible with further processing steps without prior cleaning with a solvent to remove flux residue. The solder paste comprises a relatively low amount of rosin in combination with a viscous solvent system, thixotropic agents, activators, additives and optionally plasticizers.
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