Tag Archives: soldering

Wicked Wicking

This PCB assembly challenge involved attaching a solar panel to one side of a pad using solder paste with a pass through an SMT reflow soldering oven. The attachment or bond itself wasn’t the issue; but after the first trial … Continue reading

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Solder Defects Causes and Cures Webinar

If you missed the SMTA International preshow webinar supported by CIRCUITS ASSEMBLY you can view it online here. Printing solder paste or other conductive material requires zero defects printing if a high first-pass yield is to be achieved when using fine-pitch … Continue reading

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Down the Drain

Figure 1 shows a closeup photo of a PCB assembly, it seems as though solder has flowed “down the drain” and away from the solder joint where it’s needed. In fact it has, because the customer has inconveniently located a … Continue reading

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Using the Newest Gen Arm, Part II

I’m a bit behind in my blog work — well, way behind, actually. I started this series back in January with the intro post. Here’s where I am right now: I have three different sets of PCBs. One set, I took … Continue reading

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Putting the ‘United’ in United States

In Ken Burns‘s excellent miniseries The Civil War, Shelby Foote states that the Civil War  made us a country by uniting North and South.  He argues that before the War, its citizens might say the United States are a good place … Continue reading

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Musings on Metals: Copper

It could be argued that civilization began with the smelting of copper.  Although thousands of years before, humans fired clay to make figurines and containers, smelting required several non-obvious steps.  After all, the firing of clay, at some level, can … Continue reading

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Service Life

A reader writes: My company makes an electronic product that requires a 40- year shelf life. We assemble with tin-lead solder on FR-4 PWBs. The product is to replace older technology (i.e. 1960-70s), but has some newer components such as BGAs, SOICs, … Continue reading

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Revelations at ACI

Folks, I’m taking a few moments from Wassail Weekend, held annually in my village, Woodstock, VT (“The prettiest small town in America”), to write a post about the recent workshops at ACI. Indium colleague Ed Briggs and I gave a … Continue reading

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Via Shifting

Here’s an example of what via in pad can do for a small passive component. Other things can happen too, like tombstoning or twisting. But take a close look at this photo. In doing so, you’ll note that both sides … Continue reading

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The Cost of Misunderstanding Standards

An article in the latest issue of Assembly magazine asserts that use of standards, specifically IPC-A-610 and J-STD-001, raises the cost for US manufacturers and has led to the widespread offshoring of assembly. The premise of the article, authored by … Continue reading

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