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2-33.P type

2-33.P type A semiconductor has electrical conductivity between that of a conductor and an insulator. Semiconductors differ from metals in their characteristic property of decreasing electrical resistivity with increasing temperature.Semiconductors can also display properties of passing current more easily in one direction than the other, and sensitivity to light. Because [...]

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2-34.Chemical Mechanical Polishing

2-34.Chemical Mechanical Polishing Chemical Mechanical Polishing/Planarization is short as CMP, a process of smoothing surfaces with the combination of chemical and mechanical forces. It can be thought of as a hybrid of chemical etching and free abrasive polishing.

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2-35.Prime Grade

2-35.Prime Grade Prime Grade:The highest grade of a silicon carbide wafer.  SEMI indicates the bulk, surface, and physical properties required to label silicon carbide wafers as “Prime Wafers”.

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2-36.Reclaim Grade

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.

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2-37.Test Grade

2-37.Test Grade Test Grade: A silicon carbide wafer of lower quality than Prime, and used primarily for testing processes.  SEMI indicates the bulk, surface, and physical properties required to label silicon carbide wafers as “Test Wafers”.

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1-1.lattice parameter

1-1.lattice parameter The lattice constant, or lattice parameter, refers to the constant distance between unit cells in a crystal lattice. Lattices in three dimensions generally have three lattice constants, referred to as a, b, and c. However, in the special case of cubic crystal structures, all of the constants are [...]

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1-2.Stacking Sequence

1-2.Stacking Sequence If we are going to make a laminated structure, we must know the thickness of each ply and the angle of each ply traditionally in degrees defined from the top layer down.  

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1-3.Mohs Hardness

1-3.Mohs Hardness Rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised(1812)by the German mineralogist Friedrich Mohs. The Mohs hardness of a mineral is determined by observing whether its surface is scratched by a substance of known or defined hardness.

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1-4.Density

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:  

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1-5.Thermal Expansion Coefficient

1-5.Thermal Expansion Coefficient Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. When a substance is heated, its particles begin moving more and thus usually maintain a greater average separation. Materials which contract with increasing temperature are rare; this effect is limited [...]

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