Printed circuit boards
Avaliação do processo de extração de prata contidos em placas de circuito impresso via lixiviação ácida e recuperação por oxirredução / Evaluation of the silver extraction process in printed circuit boards by acid lixiviation and oxirreduction recovery
... from printed circuit boards of electronic equipment through physical and chemical processes, in which the size of the plates were reduced, followed by acid leaching, using diluted nitric acid ...
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SEPARATION OF COPPER FROM A LEACHING SOLUTION OF PRINTED CIRCUIT BOARDS BY USING SOLVENT EXTRACTION WITH D2EHPA
... The solvent extraction process has been widely used in hydrometallurgical metal recycling from WEEE (Kumari et al., 2016). Provazi et al., 2011) studied metal separation from a leaching liquor of spent batteries using ...
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An Enhanced Random Vibration and Fatigue Model for Printed Circuit Boards
... vehicles printed circuit boards, what can cause failure on mission functionality due to fatigue damage of electronic ...on Printed Circuit Boards (PCB) is pre- ...
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Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor
... In addition to these two bacterial genera thermophilic microor- ganisms may also be employed in bioleaching operations (Brandl et al., 2001; Pant et al., 2012). As a rule, leaching at elevated tem- peratures has the ...
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A FPGA IMPLEMENTATION OF SOLDER PASTE DEPOSIT ON PRINTED CIRCUIT BOARDS ERROR DETECTOR BASED IN A BRIGHT AND CONTRAST ALGORITHM
... Solder paste deposit on printed circuit boards (PCB) is a critical stage. It is known that about 60% of functionality defects in this type of boards are due to poor solder paste printing. ...
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Avaliação do processo de extração do cobre e prata contidos em placas de circuito impresso via lixiviação ácida e recuperação por oxirredução / Evaluation of the copper and silver extraction process in printed circuit boards via acid lixiviation and oxirreduction recovery
... from printed circuit boards of electronic equipment through physical and chemical processes, reducing the size of the plates and subsequently performing acid leaching using acid nitric acid, ...
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GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF MOBILE PHONES SCRAPS USING A LEACHING SOLUTION ALTERNATIVE TO CYANIDE
... the printed circuit boards (PCB) of waste electrical and electronic equipment (WEEE) are attracting interest among researchers for environmental concern reasons and mainly for their content of ...
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RECYCLING OF PRINTED CIRCUIT BOARDS FROM SCRAPPED COMPUTERS FOR TIN RECOVERY BY ELECTROELUTION OF ION EXCHANGE POLYMERIC RESIN
... This work presents experimental results for tin recovery from synthetic aqueous solution based on leaching liquors for computers recycling using the electroelution technique of cationic polymeric resin Amberlite IR-120® ...
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A tool for errors detection in printed circuit boards production
... reason, Printed Circuit Boards (PCBs) are fabricated with the Surface Mount Technology (SMT) nowadays and IC mounting on PCB is a crucial process that requires high ...
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Processing of printed circuit boards of small electrical and electronic devices.
... Após a extração do ouro e da platina, a solução ácida residual (rafinado) foi lentamente evaporada sob placa aquecedora, em capela, a ~50ºC até 4-10% do volume inicial, empregando o me[r] ...
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RECYCLING OF PRINTED CIRCUIT BOARDS AIMING SILVER RECOVERY: A HYDROMETALLURGICAL ROUTE STUDY
... characterize printed circuit board of computers and propose a hydrometallurgical route for silver recovery present in its ...the printed circuit board was comminuted in both knife and hammer ...
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Avaliação do processo de extração do cobre contido em placas de circuito impresso via hidrometalúrgia e recupeção por oxirredução / Evaluation of the copper extraction process in hydroometalurgy printed circuit boards and oxirreduction recovery
... equipment printed circuit board copper through physical and chemical processes, in which the size of the boards was reduced and the concentrated copper was then leached in ...
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A Novel Technique to Perform Plating on Printed Circuit Board
... From the results obtained it is observed that the coating obtained is of nanostructured size.There will be less number of pin holes. The Result confirms that pulse. Plating is better for printed circuit ...
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DEVELOPMENT AND TESTING OF ERRORS CORRECTION ALGORITHM IN ELECTRONIC DESIGN AUTOMATION
... for printed circuit boards (PCB) in electronic design automation ...of circuit boards DRC-errors should be corrected, that is ensured by the creation of error-free DRC ...
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Corrosion in Electronic Devices and Sensors to Prevent Corrosion
... Figure 4 showed the PCB of a remote control of TV where a white fluffy precipitation was found surrounding the soldering. Such deposition is termed as dendrites. As Printed circuit boards can suffer ...
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Using the Fuzzy DEMATEL to Determine Environmental Performance: A Case of Printed Circuit Board Industry in Taiwan.
... Printed circuit boards (PCBs) are manufactured using numerous high-end technologies such as printing, etching, electroplating, and drilling ...
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Rev. Esc. Minas vol.67 número1
... The printed circuit boards (PCB) represent approximately 30% of the electronic waste generated and its recycling is a complex process, but very important for the recovery of metals of high economic ...
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Online Disclosure of Intellectual Capital An Analysis of the Iberian Banks
... Value creation is a major claim of most companies and when leafing through the annual reports of companies one encounters expressions such as “value to our shareholders”, “we provide value for our customers”, “we create ...
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A FAULT TOLERANT FPGA BASED IMAGE ENHANCEMENT FILTER USING SELF HEALING ALGORITHM
... reconfigurable circuit, it evolves the function of each processing element based on the self healing algorithm which is explained in next ...reconfigurable circuit [2] is designed to give executable program ...
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Detection of transient disturbing signals on PC boards
... electronic device is penetrable on all its coupling dimensions as long as the disturbing signal has significant spectral den- sity in the corresponding frequency range. Tracks leading signals, whose amplitude is high ...
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