2-36.Reclaim Grade
Reclaim Grade:A lower quality wafer that has been used in manufacturing and then reclaimed , etched or polished, and then used a second time in manufacturing.
2-36.Reclaim Grade
Reclaim Grade:A lower quality wafer that has been used in manufacturing and then reclaimed , etched or polished, and then used a second time in manufacturing.
5-4-1 Historical Lack of SiC Wafers Reproducible wafers of reasonable consistency, size, quality, and availability are a prerequisite for commercial mass production of semiconductor electronics. Many semiconductor materials can be melted and reproducibly recrystallized into large single crystals with the aid of a seed crystal, such as [...]
5-4-4-2 SiC Epitaxial Growth Polytype Control Homoepitaxial growth, whereby the polytype of the SiC epilayer matches the polytype of the SiC substrate, is accomplished by “step-controlled” epitaxy . Step-controlled epitaxy is based upon growing epilayers on an SiC wafer polished at an angle (called the [...]
3-4. Step Bunching Step bunching is visible as a pattern of parallel lines running perpendicular to the major at. If present, estimate the % of speci ed area affected.
1-4.Density The mass density or density of a material is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:
3-9. Comet Tails Comet tails have a discrete head and trailing tail. These features are aligned parallel to the major at. Usually, all comet tails tend to be of the same length. Count once per occurrence. Two comet tails within 200 microns count as [...]