Precious metals are the most attractive resources in waste printed circuit boards (PCBs) of mobile phones. In this work, an alternative process for recovering Au, Ag, and Pd from waste PCBs of mobile phones by supercritical water oxidation (SCWO) pre-treatment combined with iodine-iodide leaching process was developed. In the process, the waste PCBs of mobile phones were pre-treated in supercri...

In this paper, we consider a repetitive routing problem which we find on a printed circuit board assembly line. There are m different printed circuit boards to be processed. As an automated manipulator embeds electronic parts in a printed circuit board from above, n identical pins from underneath protect it against overbending. A dedicated pin configuration is designed for each printed circuit ...

The existence of counterfeit products, e.g., integrated circuits (ICs) and printed circuit boards (PCBs), in the modern semiconductor supply chain has seriously jeopardized security reliability electronic systems, also caused loss suppliers' profit reputation. Most existing research papers prevent or detect IC PCB substrate separately, without testing as a whole, often require assistance extern...

The rapid growth in the use of electronic equipments, combined with early obsolescence has contributed enormously to the generation of large quantity of electronic (e) waste. One such e-waste, the mobile phone printed circuit boards (PCBs) contain various precious metals which can be extracted by different hydrometallurgical routes. The present work deals with the recovery of gold using ammoniu...

Laser removal of surface oxides and small particles from copper surfaces was carried out using a Q-switched Nd:YAG laser. Oxide layers and small particles on copper surfaces should be removed for the improvement of solder quality on printed circuit boards (PCBs) and for the prevention of circuit failure or loss of production yield during the fabrication of microelectronic devices. A selective r...

The design and development of reliable electronic systems is a highly challenging task. In this paper we present the results of research carried out in order to improve the reliability of the printed circuit boards of a high reliability electronic consumer product manufactured locally by the application of accelerated life testing and interconnect stress testing. Reliability improvement is a ma...

Abstract The technique of embedding components inside printed circuit boards (PCBs) is described, using different filling masses. To investigate the possibility placing board, a residual breaker with an overload protection (RCBO) system was adapted. Four types fillings (two epoxy and two silicone) were used in tests, which carried out showing full functionality systems embedded PCB, regardless ...

This paper proposes a method for extracting transmission characteristics of interconnects in printed circuit boards (PCBs) from near-field emission. A wideband microstrip line electric probe is used to measure the There are two key technologies extraction principle, obtaining transfer function and input signal estimation, they explained detail. To validate method, one-trace structures, includin...

High-speed electronic circuits are becoming more and more important in modern communication systems, thus leading to an increasing interest in printed circuit boards, interconnect, and packaging. Nowadays, full-wave numerical methods are widely used in order to investigate both signal integrity and electromagnetic compatibility issues arising in PCBs design. When broadband information is desire...