Printed Circuit Boards (PCBs) collected from local sources were used for recovering copper by electrolytic process, using a laboratory reactor setup of working volume 15 liters and nitric acid for dissolution. Copper plate was used as the cathode and graphite rod as the anode for the deposition process. Five durations were adopted both for the dissolution and deposition processes. Based on the ...

The current practice in the assembly of electronic components on printed circuit boards (PCBs) is serial production. a process characterized by very long set-up times. However, with the advent of efficient on-line process information .. new production control methods are now possible. This paper proposes a different production method, called the group set-up (GSU) method, which can significantl...

Very recently bioleaching has been used for removing metals from electronic waste. Most of the research has been targeted to using pulverized PCBs for bioleaching where precipitate formed during bioleaching contaminates the pulverized PCB sample and making the overall metal recovery process more complicated. In addition to that, such mixing of pulverized sample with precipitate also creates pro...

Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Malaysia Corresponding Author: Johan Sohaili ___________________________________________________________________________ Abstract From the use of renewable resources and environmental protection viewpoints, recycling of waste printed circuit boards (PCBs) receives wide concern...

Despite its introduction over 3 decades ago, designing, manufacturing and testing of high-density interconnect (HDI) printed circuit boards (PCBs) remains a topic discussion. A plethora advanced processes is used to realize HDI PCBs in general microvias particular. The technology for space applications the pursuit qualification by European Space Agency create need critical review existing test ...

Failure of blind via is one of the main causes of an open circuit in printed circuit boards (PCBs). By using macroscopic and microscopic testing methods and characterization techniques, the failure analysis of the vias on PCB for novel mobile phones has been systematically carried out. Metallographic inspection shows obvious cracking along the interface of different copper layers. Micrograph ob...

The development of printed circuit boards (PCBs) has so far followed a traditional linear economy value chain, leading to high volumes waste production and loss at the end-of-life. Consequentially, electronics industry requires transition more sustainable practices. This review article presents an overview potential solutions new opportunities that may arise from greater use emerging materials ...

Computed Tomography is a technique that can be performed using a set of X-ray images to re-create a three dimensional dataset which contains information about internal structure. Analysis of multilayered Printed Circuit Boards with their components using this technique allows for the non destructive evaluation of internal layers of failed boards. This report presents the results of computerised...

This paper describes the integration of printed circuit board design and fabrication into a computer architecture course. These printed circuit boards utilized 7400-series chips to realize an 8-bit ALU having the functions ADD, OR, ADD, SUB, and set-less-than. Students designed and laid out the boards using electronic tools. Their designs were sent out for fabrication and the resulting boards w...