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The need for EMI shielding is becoming more pronounced as it is driven by miniaturization of devices, higher bandwidth of market needs, multiple applications on the same device, and heightened safety concerns with regard to the threat of electromagnetism to the health of users. In this paper, we present a reliable method for thin film coating on the surface of a molding compound by nickel and copper...
It is very important to verify the gold content of karat-gold jewelry in order to avoid fraud and to guarantee the identity and the integrity of a gold bar. There are quite a number of techniques which are used to verify the gold content. Gold testing methods such as fire assay, touchstone testing and hydrostatic weighing have been used since the early civilization. In this paper, a conceptual framework...
Conformal plating on mold compound is a new fabrication process technology, it offers new possibility for IC package design to improve features such as rigidization of the flexible core, heat sinking, 3D circuit patterning and EMI shielding. This fabrication technology had successfully demostrated a process which is able to achieve high reliable performance, as being proven to have high peeling strength...
Vibration energy harvester is receiving considerably amount of interest for the past decade. Many improvements such as making it tunable, broadband based and hybrid harvester have been demonstrated in the literature, generally to exploit more electrical energy from the ambient. In this paper, we study the arrangements of the magnets that referred to as cantilever beam proof mass, as means for generating...
Vibration energy harvester converts kinetic energy from ambient vibration into electrical energy. Many energy harvesters in the literature use single element transducer, either piezoelectric, electromagnetic or electrostatic for above purpose. In this paper, a hybrid based energy harvester that integrates with both, piezoelectric and electromagnetic transducers is developed and examined. The energy...
One of the challenges of miniature electronic system such as those work as a part of a wider wireless sensor system is to provide sustainable electrical power source to all the electronic components in a small enclosure of sensor node. However, as the size of the micro-power generator reduces, the physical limitations as well as the reduction of output power become the major concerns of the usefulness...
Ambient vibration is one of the popular sources for energy harvesting due to its ubiquitous present in almost everywhere. For the past few years it has attracted many interests in the design and development of vibration based micro generators for low power electronic applications. The aim of this paper is to investigate on useful ambient vibration sources which would have great potential for the application...
Due to the fact that the ambient vibration sources are random and unpredictable, therefore a vibration based energy harvesting device is desirable to be able to operate at wider bandwidth in an envelop of frequency range to generate maximum electrical output. In this paper, various ambient vibration from household appliances, machineries, vehicle and moving vehicle were measured and investigated....
Thick-film piezoelectric free-standing structures fabricated with a combination of conventional thick-film technology and a sacrificial layer technique are presented. The structures were fabricated in the form of composite cantilevers, consisting of lead zirconate titanate (PZT) as the functional element and silver/palladium (Ag/Pd) as the electrodes. The cantilevers are free standing above a substrate...
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