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    The use of printed circuit boards (PCBs) has become essential in manufacturing parts with electronic functions. However the placement of PCBs inside a product requires special plates or fixtures that need to be separately designed fabricated and assembled. In addition PCB manufacturing generally utilizes various toxic metals and etchants. Thus there is a need to address the issues of

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    Part 1 of this article defines and describes the designs that carry these low currents explains the problems that arise when you design these circuits and examines the application of shielding and guarding methods. In Part 2 we examine how your component selection affects the performance of your low-leakage circuits and discuss how noise creeps into low-leakage designs.

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    The solder bond will be poor and the cracks may develop in the joint over time. Repair Cold joints can usually be repaired by simply re-heating the joint with a hot iron until the solder flows. Many cold joints (such as the one pictured) also suffer from too much solder. The excess solder can usually be drawn-off with the tip of the iron.

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    As a matter of fact the e-waste recycling and management is not simple and straightforward at present (Mella et al. 2014).The "mineralogy" of WPCBs is much different comparing to of the natural ores for metals refining (Hagelüken and Corti 2010) first up to 60 different elements are closely interlinked with complex assemblies and sub-assemblies (Hagelüken and Corti 2010) such as

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    The board s dimensions are 250mm x 150mm and its single copper layer is on the top side 15mm above the reference plane. In subsequent experiments I replaced some or all of the plastic pillars with metal pillars that RF-bonded the top copper PCB plane to the reference plane to investigate the effect on the structural resonances.

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    Electronic waste or e-waste is an emerging problem with developed nations as with developing nations. In the absence of proper collection and disposal systems awareness and proper regulations the problem is rather more acute in developing nations. These wastes are environmentally hazardous on one hand and valuable on the other. They contain substantial amount of metal value

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    Printed Circuit Boards (PCB)Noise originates and ultimately may affect the board level (most basic) components. CablesSignal-carrying cables can act as antennas to radiate EMI. A number of shielding products (not related to EMI Shielding Compounds) can reduce EMI cable problems.

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    The solder bond will be poor and the cracks may develop in the joint over time. Repair Cold joints can usually be repaired by simply re-heating the joint with a hot iron until the solder flows. Many cold joints (such as the one pictured) also suffer from too much solder. The excess solder can usually be drawn-off with the tip of the iron.

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    1. Introduction. The continuous technological innovation has greatly shortened the life cycle of electronic products. At the same time rapid market penetration and planned obsolescence also make people have higher requirements and greater demands for electronic equipment resulting in a large number of waste appliances and electronic products (Ghosh et al. 2015 Satyro et al. 2018).

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    1. Global e-waste production. In the current world Waste Electrical and Electronic Equipment (WEEE) or known as e-waste becomes to be one of the fastest growing waste streams and a global environmental problem ().The United Nation estimated that approximately 20 million to 50 million metric tons of e-waste are generated worldwide each year out of which around 20–25 e-waste

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