Interest in Formula for Calculating Alloy Density Still Keen
Folks, The technique to calculate density of an alloy still attracts interest about a year after I first discussed it. Although I am pleased to shar...
Solder Alloys
Repeal RoHS Movements Emerge
Folks, As one might expect, repeal RoHS movements are now occurring. These movements continue to miss or misunderstand a few points which are think ar...
RoHS D Day +0
Folks, Well today is “The Day,” RoHS starts, but the furor continues. I would like to review some points: 1. The EU and the world are chok...
People Still Not Getting the Purpose of RoHS
Folks, People in the solder and leadfree world still do not understand the prime reason for RoHS: To make recycling easier. A recent article about Swa...
Dr. Ron Giving Free WEEE/RoHS Workshop at Dartmouth
Folks, I am giving an updated version of my one day workshop on WEEE/RoHS compliant assembly at The Thayer School of Enginnering at Dartmouth o...
Missing the Point About WEEE and RoHS
Folks, My Indium colleague Jim Slattery, pointed out an interesting article in Electronic Design. After the article, some people sent in responses. A ...
General RoHS Questions
Haibing writes: Question 1: My questions are centered around RoHS judgments. That is, how I can judge whether a contract manufacturer is RoHS c...
No Such Thing as Completely Lead-Free
Folks: A reader writes: Dr. Ron I attended your seminars last year at the SMTAI Technical Conference in Chicago and Boston and discussed with you LF i...
Mixed Lead-free and Leaded Reliability: A Hot Technical Topic at APEX
Folks, My friend and colleague Jim Hall of ITM pointed out that the reliability of “mixed” (i.e. lead free and leaded solder and fi...
Tin Pest in Scandinavian Church Organ Pipes
Annika writes: Dear Dr. Ron, I’m a chemist and a PhD student working in the field of atmospheric corrosion of lead and lead-tin alloys in histor...
SAC Alloy for RoHS Compliant Solder Paste: Still on Target
Folks, I read with dismay this week, an advertisement in an electronic assembly trade journal touting a “drop in” solder paste. The solder...
A Layman's Perspective on the Effect of Alloying
Folks, Recent work and teaching has caused me to reflect on several interesting properties of alloys. Alloying typically: 1. Lowers the melting temper...