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The electrical and signal transmission characteristics of copper foil used in high-frequency and high-speed circuits depend on its surface roughness, microstructure of nodular layer and wire etching quality. This study presents the influence of copper foil manufacturing process on the transmission loss of printed circuit board (PCB) in high-frequency circuit applications. Experimental results indicated...
To determine the ultrafine nano-scale grains in a fault gouge; the Chelungpu fault gouge was sampled and analyzed. It was separated into different particle size ranges and was analyzed by synchrotron X-ray diffraction and transmission electron microscopy. The minerals of gouge are predominantly composed of quartz, plagioclase, smectite, illite, chlorite, and kaolinite. The mineral association of <100nm...
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