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DIY: Hand Cutting NanoFoil®

Hand cutting is only one option for shaping NanoFoil®, however it is quick, easy, and inexpensive. All you need to cut NanoFoil® with this method is a good cutting surface, metal straight

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Weibull Analysis II: The Curse of the Early First Failure

Folks, In continuing our discussion on Weibull Analysis, let’s assume we assembled some SMT and through-hole PCBs with lead-free solder paste. On this board are also some bottom-side terminated

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DIY: Electroplating NanoFoil®

A few years back, Indium Corporation's own Eric Bastow set up a prototype NanoFoil® plating process to demonstrate the material and cost savings of setting up a small plating bath. One of the

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Time Required for Refrigerated Flux and Solder Paste to Reach Room Temperature

One question that I often hear from customers is; “Once out of the refrigerator, how long do I have to wait to allow my solder paste and/or flux to reach room temperature in order to use

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Addressing a Defect of Poor wetting and Non-Spread of Solder Preforms

We’ve heard about the solder paste “graping” defect, but the same oxidation challenge occurs in other solder forms as well, such as solder washer preforms used to attach small

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Sn-plated NanoFoil®

Tin-coated NanoFoil® is not one, but two very different products, combined. It is a heat source and a form of solder. In the world of interconnection, this is quite unique. (Shown in the picture

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Special Cause and Common Cause Variation and Knob Twiddling: continued

Folks, Let’s see how Pete is handling the wave solder crisis. Pete had to admit that he was surprised by the positive outcome of his meeting with Fred Castle. He had sent Patty a text the day

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Activation of NanoFoil®

NanoFoil® is described as “reactive multilayer foil”. It is comprised of many alternating layers of aluminum and nickel which are each only nanometers thick. These layers are waiting in close

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Special Cause and Common Cause Variation and Knob Twiddling

Folks, It's been a while. Let's look in on Patty…… Patty stared, bleary eyed, at her laptop screen. It was the day after the election. She and Rob were following the election

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How to Solder a Wire to a Pad

It seems like a fairly simple thing to do. What could be difficult about soldering a wire to a pad? Well, I hear three common complaints and expressions of frustration: POSITIONING: Typically, in

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Optical Activation of NanoFoil®

Lasers and fiber optic waveguides can be used to activate NanoFoil®. Why would you want to use a laser to do this? It lends itself to automation: Imagine a part moving into position, the laser

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Can Your Mortality Be Modelled with The Weibull Distribution?

Folks, In the last posting, we saw how Weibull analysis helped us to determine that SACm® lead-free solder (SAC105 with about 0.1% manganese) has comparable (actually better) thermal cycle

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Weibull Analysis of Solder Joint Failure Data II

Derivation of the Weibull Graph Folks, Last time we introduced Weibull analysis. Let's now derive the relationships needed to calculate the slope, beta, and characteristic life, eta. F(t) is the

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Indium Seals

Due to its softness and compressibility, indium is ideal for use in creating a seal. Let's get right into it: Indium preforms are commonly used to create seals. The preforms are made into an

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Electronics Failure Analysis for Pb- and Pb-Free Solder Joints

Folks, The Weibull distribution is arguably the most important distribution in failure analysis of leaded and lead-free solder joints. It is the first thought of someone trying to model thermal

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Statistically Significant vs Practically Significant Results in SMT Assembly

Folks, Everyday, we are exposed to the results of surveys and polls. A typical example might be that President Obama is leading Mitt Romney in a poll by 48% to 45%, but the results are not

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A Look Inside the Solder Flux Pen

Here is a picture of an Indium Corporation solder flux pen, sectioned to show you the internals. Who DOESN'T want to see THAT, right?!? Flux pens are commonly used to accurately supply small

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Productivity Always Pays

Folks, Let’s see how Patty and Pete are making out on their latest adventure…. “Here is the ProfitPro™ output,” Dave Ferris said as he pointed to a PowerPoint slide on the

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Calculating Solder Paste Usage

Calculating the exact amount of solder paste needed for a given circuit board or for a full production run can be difficult for several reasons, including: print deposit variations paste left on the

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A Penny per Gram

Folks, It has been a while, let’s look in on Patty…… Patty had to admit that she was very fortunate. She had yet to turn 30 and she was a Senior Vice President at ACME. There was

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Cleaning No-Clean Solder Paste Residues in SMT Assembly

Folks, There is a lot of interest in cleaning PCBs that have been assembled with no-clean solder pastes. Recently I discussed the topic with my good friend Mike Bixenman of Kyzen. Dr. Ron (DR) Mike,

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