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Materials used in the manufacturing of semiconductor chips
Release time:
2024-09-30
To meet the demands of mass production, the electrical properties of semiconductors must be both predictable and stable; therefore, stringent requirements are imposed on the purity of dopants and the quality of the semiconductor crystal lattice. Common quality issues—such as lattice dislocations, twins, or stacking faults—can all degrade the performance of semiconductor materials. For a semiconductor device, defects in the material’s crystal lattice are typically the primary factor limiting device performance.
To meet the demands of mass production, the electrical properties of semiconductors must be predictable and stable; therefore, both the purity of dopants and the quality of the semiconductor crystal lattice must adhere to stringent standards. Common quality issues—such as lattice dislocations, twins, or stacking faults—can all degrade the material’s performance. For a semiconductor device, defects in the material’s crystal lattice are typically the primary factor limiting device functionality.
Currently, the most common method for growing high-purity single-crystal semiconductor materials is known as the Czochralski process (a widely used technique in the steel industry). In this process, a single-crystal seed is immersed in a molten liquid of the same material and then slowly pulled upward while being rotated. As the seed is drawn up, the solute solidifies along the solid–liquid interface, and the rotation ensures a uniform temperature distribution throughout the growing crystal.
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