Tag Archives: junction temperature

Holiday Sale: 25 % Off Qpedia Book Series!


coolingZONE is running a holiday promotion on the Qpedia Book Series, discounting 25% off the normal retail value until December 31, 2012. Qpedia Thermal eMagazine is the official media sponsor of coolingZONE. The Qpedia book series provides an expert resource for engineering professionals, professors, students and others who want to learn more about the theories and applications of electronics thermal management.

The four volume set contains nearly 200 in-depth articles, researched and written by veteran engineers. They address the most critical areas of electronics cooling, with a wide spectrum of topics and thorough technical explanation. Each article features color illustrations and images along with important thermal calculations and formulas.

Qpedia Volume 1 topic highlights:

– Heat sink design

– Pool boiling

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– Thermal chassis

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– Heat transfer

Qpedia Volume 2 topic highlights:

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– Liquid cooling

– Natural convection cooling

– Phase change materials

Qpedia Volume 3 topic highlights:

– CFD modeling

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– LED cooling

– Cold plates

– Refrigeration systems

Qpedia Volume 4 topics highlights:

– Multilayer mini-channel heat sinks

– Electro-osmotic pumps

– Thermoelectric coolers

– High altitude heat transfer

– Data center cooling

– Defense electronics

– Automotive electronics cooling

Check out the video on Qpedia Volume 4

Over fifteen thermal and mechanical engineers combined their expertise to create the articles in this useful collection, including Kaveh Azar, Ph.D. and Bahman Tavassoli, Ph.D., both of whom are internationally recognized experts in the field of the thermal management of electronics. Qpedia Thermal eMagazine, published by Advanced Thermal Solutions, Inc. (ATS) was launched in 2007 as a technical publication dedicated to the thermal management of electronics.

Filled with careful explanations, step-by-step calculations, and practical examples from real life challenges, this expert collection of articles is a must have for any mechanical, electrical, and thermal engineer or anyone interested in the rapidly growing field of electronics cooling.

Order the Qpedia Book Series with 25% off now at www.coolingzone.com The books can be purchased as a complete set, combination, or individually. Volume discounts for organizations and academic institutions are also available.

What is electronics thermal management?

We talk a lot here on the ATS Thermal Management blog about thermal management. And there’s a good reason for that of course! That’s what we are fanatical about. Keeping electronics cool so they operate at their best design point.

But, after you peel back boiling points, forced thermal spreaders, heat sinks, liquid cooling, thermal interface material, and more you are left with one critical, salient point about what is electronics thermal management.

To ensure that the device junction temperature (Tj) stays below a set limit.

What is a junction? The Hottest Spot on a Chip

this photo shows the semiconductor junction temperature hot spot

When semiconductor designers make a chip, especially a complex ASIC or something like an Intel server processor, these chips are effectively systems. Packed with circuits, and often in very dense packages, certain parts of the chip have sections that operate with greater frequency than other parts.  The result, those “spots” or “junctions” are very hot.  And so, cooling that junction is the key to all this Thermal Management. That’s our goal.

In fact, the first step in really getting the right solution to your projects thermal challenge is to determine it’s junction temperature. Here’s some handy helps to get you there….

How to calculate a semiconductor junction temperature part 1

How to calculate a semiconductor junction temperature part 2

Once you’ve calculated your junction temperature, you can then have a much better chance of choosing the right heat sink.

Of course, if you ever need help with this ATS is here. You can email us at sales.hq@qats.com or give us a call at 781-769-2800 We’re always happy to help with your thermal management projects.