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In recent years, miniaturization, lightening, high performance, high reliability and low cost have been demanded intensely for electronic products, especially in the rapid growth of portable cell phone domain. Furthermore, multiple functional demand induces advanced package developments, such as system-on-chip (SoC) and system-in-package (SiP). System-on-chip (SoC) is an ideal package to integrate...
In recent years, miniaturization, lightening, high performance, high reliability and low cost have been demanded intensely for electronic products, especially in the rapid growth of portable cell phone domain. Furthermore, multiple functional demand induces advanced package developments, such as system-on-chip (SoC) and system-in-package (SiP). System-on-chip (SoC) is an ideal package to integrate...
A multi-dimension comprehensive thermal model is presented to simulate the steady temperature distribution of breast, which is based on the breast anatomical structure and physiological characteristics. This model takes the metabolic heat generation, blood perfusion and vascular thermal interaction into account. Finite element analysis method is used to solve the heat diffusion equation. The simulated...
Flip chip ball grid array (FCBGA) was developed to meet the requirements of more functionality, excellent electrical performance, high input/output (I/O) density and high speed in semiconductor device market. In the past experience, the frequent coming challenges were bump fatigue crack and low-k chip delamination caused by Coefficient of Thermal Expansion (CTE) mismatch between chip and substrate...
Flip chip ball grid array (FCBGA) was developed to meet the requirements of more functionality, excellent electrical performance, high input/output (I/O) density and high speed in semiconductor device market. In the past experience, the frequent coming challenge was bump fatigue crack caused by CTE mismatch between chip and substrate during the reliability tests. In order to elevate the resistance...
In sound-transmitting applications such as therapeutic ultrasound, the acoustic power at a particular operating frequency is a critical figure of merit for transducer/array design. A design methodology for enhancing the acoustic power radiated from fluid-loaded piezoelectric array elements at a fixed frequency is developed in this paper. A gradient-based optimization algorithm is integrated within...
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