Peter Borgesen Weighs in on Lead-Free Solder Reliability
Folks, I met Peter Borgesen back in the mid 1980s when he was a research scientist at Cornell working with Professor Che-Yu......
Field Data Encouraging for Lead-Free Solder Reliability
Folks, Although a few have suggested that lead-free reliability is an oxymoron, currently most people that have studied the reliability of SAC3...
Thermocompression Bonding for Microbump Flip-Chip Soldering
For reasons that I will discuss in a post later this year, a common factor that is emerging in the area of copper-pillar microbump 2.5D and 3D jo...
Solder Alloy Densities: Comparing Calculated to Actual
Folks, I have occasionally written on calculating solder alloy density, as there is surprisingly more interest than I thought there would be in ...
SMT Reflow Process Window: Solder Paste Maximum Slope vs. Ramp (or Average) Rate
Included in a solder paste‘s Product Data Sheet, among other things, are general guidelines which aid the customer in designing a...
Solving Solder Starvation in SMT Electronics Assembly
Solder starvation is a serious electronics assembly issue – with a very simple solution. Solder starvation occurs when adequate volumes of solde...
Humidity and Solder Paste Do Not Mix
Unbeknowst to me, the refrigerator where I store my solder paste and fluxes that I use for SIR (Surface Insulation Resistance) testing was.....
Lead Use on the Rise, Bismuth Supplies Secure: Solder Alloy Considerations
Based on a recent post I published regarding the use of bismuth (Bi) in solder alloys, John writes: “If Bismuth comes from the production o...
Solar Cell Testing
As a tech guy, I couldn’t be more excited about testing these 8 different c-Si solar cell / metallization designs! img width="400" hei...
Silver-free and Low-Silver Solder Alloys for SMT Discussion, Part 1: Reliability
There seems to be a growing trend to use a low-Ag or Ag-free solder alloy for Surface Mount Technology (SMT) electronics assembly, similar to what is ...
Bismuth Solder Alloy Follow On
Folks, A few people asked some questions after my last post on bismuth solders. Here they are:......