Category Archives: Dr. Ron

Materials expert Dr. Ron Lasky is a professor of engineering and senior lecturer at Dartmouth, and senior technologist at Indium Corp. He has a Ph.D. in materials science from Cornell University, and is a prolific author and lecturer, having published more than 40 papers. He received the SMTA Founders Award in 2003.

Pin-in-Paste Aperture Calculations Using Solder Preforms

Folks, The pin-in-paste (PIP) process is often the best choice when the PCBA is a mixed SMT and through-hole board with a small number of through-hole components. However, ensuring that the correct volume of solder paste is printed to ensure … 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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Low-Temperature Solders: Niche No More?

Folks, It surprises many people that the foundation metal of almost all solder alloys is tin. Alloy elements such as lead, silver, copper, indium, etc., are extremely important, as they lower the solder melting temperature below tin’s relatively high 232°C … Continue reading

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Is the PC (or Tablet or Smartphone) Dead or Dying?

Folks, We hear, on a regular basis, that the PC is dead or dying and will be replaced by the tablet. More recently, there is news that the tablet is starting to fade and even, most recently, that the smartphone … Continue reading

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The False Positive Paradox

Folks, Let’s check in on Patty… Patty was intensely preparing a lecture on Bayes’ Theorem. She always felt that this theorem was the most profound in probability and statistics. She remembered a real application, when her best friend took the … 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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Alloy Density Calculator Generates Most Interest of All Blog Posts

Folks, In the nearly 10 years that I have been blogging, I am continually surprised by the interest in a spreadsheet I created that calculates alloy densities.  I get about numerous inquiries a year on this topic.  We just renewed the … Continue reading

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Comparing Two Wiebull Distributions

Folks, Let’s look at Patty’s last day of class … As she was driving north to teach her statistics class, Patty was sad to see her stint at Ivy U come to a close. She was even more nervous about … Continue reading

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Weibull Analysis at Ivy U

Folks, Let’s check in on how Patty is doing at Ivy U. Patty was nearing the end of her teaching stint at Ivy U. Only a few more classes remained. She had to admit that she was sad to see … Continue reading

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‘Patty’ in the Real World

Folks, Every year, the wonderful folks at PCM host a visit from my class on manufacturing processes and provide a real-world tour of an electronics assembly facility. Our relationship has resulted in the class producing a video on electronics assembly. … Continue reading

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