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Usage of copper wire bonds allows to push power boundaries imposed by aluminum wire bonds. Copper allows higher electrical, thermal and mechanical loads than aluminum, which currently is the most commonly used material in heavy wire bonding. This is the main driving factor for increased usage of copper in high power applications such as wind turbines, locomotives or electric vehicles. At the same...
In this study, palladium coated copper core wire is evaluated and a series of bond quality test is carried out on Aluminum (1.5μm Al) bond pad and Nickel Palladium (2.5μm Ni/0.3μmPd) bond pad with Ø0.6mil palladium-coated copper core wire. From the optimization with mechanical chips, it is found that NiPd has larger bond parameters windows than Al bond pad. Ball shear strength of NiPd samples becomes...
The losses of realistic litz wires are characterized while explicitly accounting for their construction, using a procedure that computes the current-driven and magnetic-field-driven copper losses using fast numerical simulations. We present a case study that examines loss variation in one- and two-level litz wires as a function of twisting pitch, over a wide range of values and in small increments...
Windings printed on flexible circuit board (Flex-PCB) offers the opportunity to improve significantly the performance of slotless BLDC motors since, compared with windings made from copper wire, they may have more complex shapes in addition to a variable conductor cross-section along the winding loops. This paper focuses on the shape optimization of windings printed on FlexPCB using a genetic algorithm...
The high-frequency transformer design for switch mode power supplies consists of core and winding design. It is necessary to take the cost of power loss and core volume in the long term into consideration during selection of core size, shape and material to produce an efficient transformer. The proximity effect seen in the windings deteriorates the performance of the transformer and can be averted...
Verizon has developed several optimization methodologies for the design and operation of the FTTP network. Two of these methodologies, one design and one operations, will be presented and the benefits of advanced analytics discussed.
For the past few years, acceptance and implementation of copper wire has grown from optional to mandatory, especially after gold price increased triple for past 5 years. However, there are many companies still not able to achieve desirable performance, especially without trading off other performance indices such as quality, capacity, scrap or machine efficiency. The copper wire has two fundamental...
Optimizing the use of copper especially in the distribution system not only reduces the cost but more importantly lowers the copper losses. This paper presents a unique innovative technique which reduces copper volume while enabling home automation. This model of smart home is designed to provide a base for Smart Grid's functions like demand side management, AMR, load shedding etc. The optimization...
Decapsulation of plastic Integrated Circuit (IC) packages is an important step in package level failure analysis. In this paper, optimization of a Microwave Induced Plasma (MIP) system for plastic IC package decapsulation is described. An improvement on the microwave coupling of the MIP system is achieved and microwave power reflection is reduced from more than 50% to less than 15%. Results on oxygen...
In this paper, image inpainting based on single image is proposed, which is the problem of filling in the occluded or damaged regions of an image by the visible information from other part of the image. The key problems are how to convert the visible information in the image to consistence and to use available information to repair the target part. The first step of our method is to divide all images...
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