Technical Library | 2019-08-09 00:06:36.0
Working with SCADA systems when not properly trained and qualified can be almost as dangerous as working with PLCs without proper PLC training. Some times it can be even more costly to a company. This article explains the best way to learn SCADA systems, also the most cost-effective way! Read to learn how to select the best, what to look for in a SCADA course.
Technical Library | 2012-05-31 21:10:26.0
ProSkill Consulting and Training Group “Current Strategies for Mitigating Counterfeit Components” By: Rick Stanton - PRO-STD-001 Course Director/Corporate VP of Quality It’s well known that counterfeiting has been linked to organized c
Technical Library | 2022-12-05 16:28:06.0
The work evaluates the impact of latent heat (LH) absorbed or released by a solder alloy during melting or solidification, respectively, on changes of dimensions of materials surrounding of the solder alloy. Our sample comprises a small printed circuit board (PCB) with a blind via filled with lead-free alloy SAC305. Differential scanning calorimetry (DSC) was employed to obtain the amount of LH per mass and a thermomechanical analyzer was used to measure the thermally induced deformation. A plateau during melting and a peak during solidification were detected during the course of dimension change. The peak height reached 1.6 μm in the place of the heat source and 0.3 μm in the distance of 3 mm from the source. The data measured during solidification was compared to a numerical model based on the finite element method. An excellent quantitative agreement was observed which confirms that the transient expansion of PCB during cooling can be explained by the release of LH from the solder alloy during solidification. Our results have important implications for the design of PCB assemblies where the contribution of recalescence to thermal stress can lead to solder joint failure.
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