Semiconductor materials, like ultra flat wafers, are utilized in a wide array of electronic devices such as integrated circuits, field-effect transistors, focal plane arrays, infrared detectors, nanotech, and other innovative tools. Ultra flat wafers generally perform better. That is why achieving a prescribed flatness of wafer substrates is becoming more and more critical. In this article, we will discuss the different methods used to achieve these wafers.
Chemical-mechanical polishing or planarization is a method of smoothing and leveling surfaces using a combination of mechanical and chemical strength. It is a combination of free abrasive polishing and chemical etching. It is capable of producing flat wafers that comply with the detailed thickness and flatness uniformity requested by various clients. CMP utilizes an abrasive and caustic chemical slurry together with a polishing pad and retaining ring to polish wafers. The polishing pad is rotated in different axes of rotation against the wafer to remove material and level uneven or irregular topography. Doing this creates a flat or planar wafer, which is essential to allow additional circuit elements on the wafer.
Advanced lens polishing technology that utilizes the CMP method also helps produce flat wafers with reduced levels of trace metals using ultra-clean polishing slurries. The ultra flat wafers produced can be used for advanced silicon-on-silicon or silicon-on-insulator thermal bonding technology. CMP can also be used in compound semiconductors like gallium arsenide, silicon carbide, cadmium sulfide, indium phosphide, and cadmium telluride. It can also be tailored to produce ultra-flat thickness calibration standards necessary for metrology systems.
Ultra flat wafers play an essential role in many electronic devices, especially in demanding applications in micro-fabrication. If you’re looking for ultra flat wafers for your next project, you can get them at Wafer World. We offer high-quality wafers at a reasonable price. Contact us for inquiries or visit our website to know more about the products and services we offer!