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TDR Impedance Measurements

November 28, 2017
A Few Notes about TDR I called Ken Taylor, the president of U.S. operations for Polar Instruments, regarding a question from a customer about a time-domain reflectometer my fab uses for impedance tests.
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Free HDI Tools for Better PCB Design

November 21, 2017
In this article, you will learn about Sierra’s 3 free HDI tools, essential for HDI PCB design. We will present and explain how our HDI Stackup Planner, our HDI Material Selector, and our Impedance Calculator work so you can choose which one best suits your needs. Since it was developed at the end of the 20th century, HDI technology – which stands for High Density Interconnection – is very popular. HDI technology transformed our electronic products. We now have smaller, lighter, and faster products such as..
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HDI Stackup Planner Tutorial

October 24, 2017
Using Sierra Circuits' free HDI Stackup Planner before you begin your layout design will ensure that your HDI PCB design will be manufacturable the very first time. Step 1: The Board Information The first thing you have to do to use this tool is to fill out the board information. Fill out a part number, like Sierra Test for example; a revision number, like 2; the estimated size of the PCB, like 4 inches by 4 inches; and then choose the finished thickness –..
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