The physical properties of silicon carbide (SiC) are excellent as a third-generation semiconductor. Nevertheless, diamond wire cutting has many drawbacks, including high loss, long time and prolonged processing time. study 4H-SiC wafer slicing by using an ultrafast laser is hopeful for solving these problems. In this work, the samples with different surface roughness were processed slicing. Fin...

Two types of micron-diamond films were prepared on YG6 substrate by hot filament chemical vapor deposition(HFCVD) method. Morphology and orientation of crystalline growth were evaluated by SEM and XRD. Diamond film coated tools and sapphire wafer’ surface before and after lapping experiment  were contrasted. The results indicated that a significant change in Raman spectrum of two types of micro...

One of the most crucial factors involved in the optimum design and cost estimation of rock sawing process is the rock abrasivity that could result in a significant cost increase. Various methods including direct and indirect tests have been introduced in order to measure rock abrasivity. The Schimazek’s F-abrasiveness factor ( ) is one of the most common indices to assess rock abrasivity.  is t...

A self-developed and newly re-designed chemical SAW sensor system composed of four polymer-coated differently modified nano-diamond-coated sensors was applied to measure aromatic compounds in gasoline a low-cost, fast, easy way. An additional short packed column at the inlet improve selectivity for various possible fuel applications. The allows direct sampling liquid fuels pre-separates differe...

Ten years ago, the EDA industry faced a crippling divergence in timing between RTL synthesis and placement caused by rapidly rising wire capacitances relative to gate capacitances. Without some reasonable level of placement knowledge to give credible estimates of wire length, it was becoming impossible to measure design timing with any accuracy during RTL synthesis. At this time, placement tool...

This paper reviews existing studies and investigates thermal operational regimes of diamond bit during drilling operations. The operating temperature of the diamond core drill is studied under bench condition and an optimal thermal range are presented. Based on this study, it was noted that glazing of diamond tools is observed at temperatures less than 327°C, and normal wear of diamond tools is...