Sn/3.5Ag, Sn/0.7Cu, Sn/3.9Ag/0.6Cu, Sn/2.0Ag/0.7Cu (for Bar, Wire, Paste, BGA & Anode); Sn/Sb (for Bar); Sn (for Bar, Wire & Anode); Ni/Pd (for Bar, BGA & Anode); Conductive Adhesive (for Paste).
New Equipment | Solder Materials
With a composition of 62% Tin / 36% Lead / 2% Silver, Kapp Electric Eutectic is a cost effective eutectic electrical/electronic solder where Lead is permissible. Silver increases the strength and vibration resistance of the joint in higher stress app
Electronics Forum | Thu Jul 27 07:50:35 EDT 2006 | davef
Send us pix
Electronics Forum | Mon Jul 24 11:35:42 EDT 2006 | Jimk@ics-inc.org
We have experienced a problem with tin leaching or discoloration of lead terminals on random parts on solder side of a paste/paste operation. The profile has been used on previous production runs and there doesn't appear to be any heat damage to othe
Industry News | 2018-10-18 08:46:25.0
"Lead-Free" Semiconductor Industry
Industry News | 2010-04-30 18:47:15.0
SMTA China announces that it presented awards for the 10 best papers/presentations and two best exhibits at the SMTA China East 2010 Conference Award Presentation Ceremony, held on Wednesday, April 21, 2010 at the Shanghai Everbright International Hotel in conjunction with the SMTA China Annual Breakfast Reception.
Technical Library | 2014-06-23 14:50:52.0
It was unusual to see chip terminations change colors when tin lead solders were used but with the introduction of lead free reflow soldering and the corresponding increases in reflow temperatures terminations are now changing colors. Two conditions are present when reflow temperatures are increased for lead free solder alloys that leads to discoloration. Reflow temperatures are above the melting point of tin (Sn MP is 232oC). Air temperatures commonly used in forced convection reflow systems are high enough to both melt the tin plating on the termination allowing it to be pulled into the solder joint due to solder joint liquid solder surface tension leaving behind the exposed nickel barrier. Now those metal oxide colors will be visible due to high air temperatures during reflow.
Technical Library | 2022-03-16 19:41:17.0
Creep corrosion occurs in electronics assemblies and it is reminiscent to electromigration but does not require electrical field to drive the reaction. Corrosive elements and moisture must be present for creep corrosion to occur. Sulfur is the most prominent element to cause creep corrosion in environments such as paper mills, rubber manufacturing, mining, cement manufacturing, waste water treatment etc., also including companies and locations nearby such industries. The main part of printed circuit board assembly (PCBA) to be affected is the PCB surface finish. Especially immersion silver is prone to creep corrosion, but it sometimes occurs in NiPd (lead frames), and to a lesser extent in ENIG and OSP surface finishes. As the use of immersion silver is increasing as PCB surface finish and electronics are more and more used in harsh environments, creep corrosion is a growing risk. In this paper we will present the driving forces and mechanisms as well as suitable tests and mitigation strategies against creep corrosion
| http://etasmt.com/cc?ID=te_news_industry,4161&url=_print
Lead-free era makes whether need nitrogen in reflow a hot topic . As the lead-free solder flow resistance, wettability is not as good as lead solder, especially when the circuit board pad processed with OSP (organic protective film bare copper), the pad
| https://pcbasupplies.com/jm-20-sn60-pb40-0-3-mm/
% Flux type ROL0 Alloy composition (%) Sn 40Pb Halide content(%) 0.0 Silver chromate paper test No discoloration Solder spread factor
