New Equipment | Solder Materials
SAC305 is a lead-free alloy that contains 96.5 % tin, 3% silver, and 0.5% copper. This alloy falls under the JEIDA recommendation for lead-free soldering. When used in wave soldering, AIM’s SAC305 bar solder offers far superior fluidity as compared t
Electronics Forum | Thu Apr 27 04:21:15 EDT 2006 | slaine
you can either use an alloy that has a higher copper content to reduce dissolution or the better option is to have a Nickel plating barrier. both have there problems. Bu remember the dissolution of copper by tin carries on at a slower rate a ambiant
Electronics Forum | Thu Nov 03 08:18:17 EST 2005 | fctassembly
Hello Arnold, Just to clarify the Sn100C discussion: Please note that SN100C is the Nihon Superior alloy composed of tin/.7copper/nickel. The key point in regard to SN100C is that Cu does not go directly into solution but first reacts to form an inte
Industry News | 2019-01-30 08:13:02.0
The SMTA is pleased to announce the Best Papers from SMTA International 2018. As speakers at SMTA International, individuals make contributions to the industry by sharing their research and findings. For these exceptional achievements, a cash award and plaque are given to all winners.
Industry News | 2018-12-08 03:29:29.0
SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Technical Library | 2021-09-08 14:03:55.0
There is need in the industry to understand the effects of silver presence in solders from various applications perspective. This article will attempt to present a review of the key published results on the silver containing alloys along with results of our internal studies on wave soldering, surface mount and BGA/CSP applications. Advantages and disadvantages of silver at different levels will be discussed. Specifically this report will focus on the effect of silver on process conditions, drop shock resistance, solder joint survivability in high strain rate situations, thermal fatigue resistance, Cu dissolution and effects of silver in combination with other alloy additives. Specific application problems demanding high silver level and other requiring silver level to the minimum will be discussed.
Technical Library | 2010-07-08 19:49:59.0
Aging characteristics of new lead free solder alloys are in question by many experts because of higher amount of tin’s effect on the diffusion of other metals, primarily copper, to create undesirable boundary intermetallics over long periods of time and even moderately elevated temperatures. A primary layer of intermetallics, Cu6Sn5 forms as the liquid solder makes contact with the solid copper substrate. This reaction however ceases as the solder temperature falls below that of liquidus. A secondary intermetallic Cu3Sn1, an undesirable weak and brittle layer, is thought to form over time and may be accelerated by even mildly elevated temperatures in electronic modules such as laptops under power. This project was designed to quantify the growth rate of Cu3Sn1 over an extended period of time in a thermal environment similar to a laptop in the power on mode.
SMTnet Express, July 7, 2016, Subscribers: 25,539, Companies: 14,860, Users: 40,631 Dissolution of Metal Foils in Common Beverages Bev Christian, Nancy Wang, Mark Pritzker, Daniella Gillanders, Gyubok Baik, Weiyi Zhang, Joanna Litingtun, Brian Kim
SnCu Based Alloy Design for Lower Copper Dissolution and Better Process Control If you don't see images, please visit online version at: http://www.smtnet.com/express/ News Forums SMT Equipment Company Directory Calendar Career
| https://www.eptac.com/blog/j-std-001-revision-changes-regarding-the-requirements-for-gold-plating-removal
. As stated in a article by Eric Bastow of Indium Corporation: Intermetallics in Soldering “Keep in mind that dissolution, the phenomenon of a solid dissolving into a liquid, is affected by both time and temperature
