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Every country is aware of the importance of chips and is now accelerating the construction of its own chip manufacturing supply chain ecosystem to prevent another chip shortage problem. But the advanced foundries without next-gen chip designers would be the same as “Fabs without Chips”.

SiC's own characteristics determine its single crystal growth is more difficult. Due to the absence of Si:C=1:1 liquid phase at atmospheric pressure, the more mature growth process adopted by the mainstream of the semiconductor industry can not be used to grow the more mature growth method-straight pulling method, the descending crucible method and other methods for growth. After theoretical calculations, only when the pressure is greater than 105 atm and the temperature is higher than 3200 ℃, can we get the stoichiometric ratio of Si:C = 1:1 solution. pvt method is currently one of the more mainstream methods.

SiC substrate material is the core of SiC chip. The production process of the substrate is: after obtaining the SiC crystal ingot through single crystal growth; then preparing the SiC substrate requires smoothing, rounding, cutting, grinding (thinning); mechanical polishing, chemical mechanical polishing; and cleaning, testing, etc. Process

In traditional silicon power device fabrication, high-temperature diffusion and ion implantation stand as the primary methods for dopant control, each with its advantages and disadvantages. Typically, high-temperature diffusion is characterized by its simplicity, cost-effectiveness, isotropic dopant distribution profiles, and lower introduction of lattice damage. Conversely, ion implantation, though complex and costly, enables precise independent control over dopant concentration and depth but introduces a significant number of point defects and extended defects into the substrate.

Both epitaxial and diffused wafers are essential materials in semiconductor manufacturing, but they differ significantly in their fabrication processes and target applications. This article delves into the key distinctions between these wafer types.

Silicon is the second most abundant element on Earth after oxygen. Most silicon is found in soil, rocks, natural water, trees, and plants.