4/29/2023 0 Comments Solder reflow profileThis roughness is attributed to the increased volume contraction of the Pb-free alloys. This is because the surface of the solder joint will become rough when Pb-free alloys begin to cool. Additionally, when compared to a Pb-containing solder joint, a Pb-free solder joint will have a dull or matte finish. The surface of Pb-free solder alloys can appear significantly different when compared to Pb-containing solder (See Figure 1). Pb-free solder alloys of the SnAgCu family Metal Table 1 shows the Pb-free solder alloys in the SnAgCu family. Merit Sensor suggests using solder alloys with SnAgCu that have a melting point of 217-221 ☌. Soldering with Pb-Free SolderĪs the pressure sensors from Merit Sensor are fabricated on ceramic, a Pb-free solder should be chosen that is well-suited with the solder pads. In order to meet the RoHS directive, products must be soldered with Pb-free solder. The aim of this article is to guide customers on how to solder Merit Sensor parts using either Pb-free solder or Pb-containing solder. Merit Sensor parts can be soldered using either Pb-containing or Pb-free solder process. The lead-free solder pads are plated with AgPt to assure an excellent solder joint for most PCB connections. Merit Sensor provides pressure sensors that are fixed on ceramic substrates and are RoHS compliant. The RoHS Directive has banned the European sale of new electrical and electronic equipment containing more than the specified levels of cadmium, hexavalent chromium, lead, mercury, polybrominated biphenyl (PBB), and polybrominated diphenyl ether (PBDE) flame retardants. All profiles must be assessed and tested for best performance.ĭue to concerns over the safety of lead and new regulations prohibiting its use, such as the Restriction on Hazardous Substances (RoHS) Directive in Europe, an increasing number of companies have stopped using conventional tin-lead (Sn/Pb) solder in the manufacture of circuit boards. The objective of this article is to explain the best techniques for soldering sensors manufactured by Merit Sensor using automated equipment.
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