Halogen-free lead-free tin wire

A technology of lead-free solder and solder wire, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as poor wetting and poor welding, and achieve the effect of full solder joints and high reliability
CN102248317BInactive Publication Date: 2013-05-29JIANGXI UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGXI UNIV OF SCI & TECH
Publication Date
2013-05-29
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to the technical field of tin wires, in particular to a composite halogen-free lead-free tin wire in line with the EU (European Union) directive. The tin wires comprise the following components in parts by per unit mass: 96-98 parts of tin, 0.6-0.7 part of copper, 0.1-0.2 part of resin, 0.1-0.2 part of non-fluorochloro environmentally-friendly organic solvent, 0.05-0.06 part of thixotropic agnet, 0.02-0.4 part of organic active agent, 0.01-0.02 part of corrosion inhibitor, and 0.01-0.02 part of surfactant, wherein the tin and the copper are the solder of the tin wire, and others are soldering flux. By using said technical scheme in the invention, the product is in line with relative directive of the EU and free from lead and relative halogen. Furthermore, the reliability of the welding is high, bad welding spot cannot be formed, and the welding spot is full and bright.
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Description

Technical field:

[0001] The invention relates to the technical field of solder wire, in particular to a lead-free solder wire that does not contain halogen and conforms to the EU REACH directive. Background technique:

[0002] Solder wire is a kind of alloy solder. Usually, solder wire is used as solder when soldering with an electric soldering iron. For the convenience of the user, it is usually set as a "wire" roll of different thickness, and the user can pull it out when using it, and use it with an electric soldering iron. Solder wire secures electronic components to circuit boards. When it is heated to a certain temperature, it will be melted, so that the soldered components and the circuit board are connected together, and after cooling down from the melting point, it will solidify to form a fixed solder joint.

[0003] The solder wire used in the past is tin-lead solder wire, that is, the solder wire is synthesized with about 60% tin and 40% lead, and has a low melt...

Claims

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