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2. Solder paste - Wikipedia

   en.wikipedia.org/wiki/Solder_paste

   The amount of time solder paste can stay on a stencil without affecting its printing properties. The paste manufacturer provides this value. Tack Tack is the property of a solder paste to hold a component after the component had been placed by the placement machine. Hence, tack life is the critical property of solder pastes.

3. Solder alloys - Wikipedia

   en.wikipedia.org/wiki/Solder_alloys

   Soldering copper pipes using a propane torch and a lead-free solder. Solder is a metallic material that is used to connect metal workpieces. The choice of specific solder alloys depends on their melting point, chemical reactivity, mechanical properties, toxicity, and other properties. Hence a wide range of solder alloys exist, and only major ...

4. Solder - Wikipedia

   en.wikipedia.org/wiki/Solder

   When lead-free solder is used in wave soldering, a slightly modified solder pot may be desirable (e.g. titanium liners or impellers) to reduce maintenance cost due to increased tin-scavenging of high-tin solder. Lead-free solder is prohibited in critical applications, such as aerospace, military and medical projects, because joints are likely ...

5. Reflow soldering - Wikipedia

   en.wikipedia.org/wiki/Reflow_soldering

   Example Ramp to Spike thermal profile. Example of reflow soldering thermal profile.. Reflow soldering is a process in which a solder paste (a sticky mixture of powdered solder and flux) is used to temporarily attach anywhere from one to thousands of tiny electrical components to their contact pads, after which the entire assembly is subjected to controlled heat.

6. Restriction of Hazardous Substances Directive - Wikipedia

   en.wikipedia.org/wiki/Restriction_of_Hazardous...

   For paste solders, bismuth/tin/silver had the lowest impact scores among the lead-free alternatives in every category except non-renewable resource consumption. For both paste and bar solders, all of the lead-free solder alternatives had a lower (better) LCA score in toxicity categories than tin/lead solder.

7. Wave soldering - Wikipedia

   en.wikipedia.org/wiki/Wave_soldering

   The solder is usually a mixture of metals. A typical leaded solder is composed of 50% tin, 49.5% lead, and 0.5% antimony. [1] The Restriction of Hazardous Substances Directive (RoHS) has led to an ongoing transition away from 'traditional' leaded solder in modern manufacturing in favor of lead-free alternatives. Both tin-silver-copper and tin ...