A method for the fine-pitch stencil mask design for stencil printing bumping technology for eutectic Sn/Pb and lead-free solder material is described. In the method, a reflowing enhancement layer is introduced to improve the solder quality and reduce the pitch of solder bumps. The method of forming .....
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In recent years the demand for small cellular handsets has grown substantially and the need for still smaller handsets continues to increase. Planer inverted-F antenna (PIFA) designs have received attention since they are compact. Although smaller sizes PIFA are needed, the design of compact antenna.....
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In wireless applications, phase-locked-loop frequency synthesizers require very good phase noise performance in order to obtain a good signal-t-noise ratio for the desired signals even in the presence of very large nearby unwanted signals. Inside frequency synthesizers, thermal noise generated by th.....
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Traditional methods for resistivity measurements of concrete have to use two plate electrodes at opposite sides of a prism specimen. The major drawback of such a method is that the electrodes can be easily detached from the specimen due to shrinkage of concrete. Thus the measurement of resistivity.....
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Vehicles and factories produce a lot of air pollutant everyday. Environmental sensors for hazardous substances in the air such volatile organic compounds (VOCs) are gaining its importance in this modern society. In this invention, a series of new linear and cyclic pi-conjugated organic compounds (po.....
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