Tag Archives: SMT

To Minimize BTC Voiding, Start with the Right Solder Paste

Let’s see what’s up with Patty …. Patty was just dropped off at O’Hare airport after finishing a 3 day workshop on Lean Six Sigma statistics, design of experiments, and statistical process control. Interestingly, the students were lawyers. In recent … Continue reading

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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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Too Close for Comfort

This is a little bit like the old college prank of trying to see how many kids can squeeze into a telephone booth. Pretty soon everyone’s too close for comfort! In this PCB assembly challenge, someone made a mistake and … Continue reading

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Component Footprint Rotation

Before we (or any old assembly house) go about putting surface mount parts on a board, we need to program our assembly robots. I’m oversimplifying, but essentially, the machine program needs to know the X / Y coordinates, relative to the … Continue reading

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Cost Reduction in Design — More Advice

If you’re looking for the absolute, cheapest possible assembly service, you’ll need to look outside of North America. If you really need a decent price with good quality and good service, you can keep your gaze West of the Atlantic … Continue reading

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Hitachi’s SMT Exit

And then there were … 27? Hitachi’s board today announced plans to exit the SMT component placement business, selling off certain parts of the division and closing the rest. In a press release, the firm said it would transfer the … Continue reading

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Calculating Optimal Solder Paste Printing Aperture Parameters

Folks, A while ago, I developed an Excel-based spreadsheet, StencilCoach, that calculates optimal stencil aperture parameters for several common SMT solder paste printing applications. These applications include standard apertures, passive apertures, pin-in-paste (PiP) apertures, and preforms with pin-in-paste (PiP+) apertures. … Continue reading

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Demonstrating Zero Defects In SMT Production?

Folks, let’s see how Patty is doing at Ivy U … Patty had to admit that she really liked being a professor at Ivy University. No, that wasn’t strong enough; she was ecstatic. The combination of the stimulating and collegial … Continue reading

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Slow Train a Comin’

Where are the next generation of good engineers going to come from? If I had a nickel for every time I’ve been asked this …. well, you can do the math. A good friend asked me this just today. He … Continue reading

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Surface Mount Technology vs. Workstation Design

In today’s modern SMT assembly facilities, the design and flexibility of the workstation is critical to maintain quality, workflow and ergonomics. Unlike the old, static, welded frame workbenches and workstations of the past that were never moved or reconfigured, the … Continue reading

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