Siliziumkarbid-Halbleiter

Silicon is well known as the go-to material in semiconductor production, yet another material may become the next big thing for power applications – silicon carbide.

Silicon Carbide (SiC) boasts superior electrical and thermal properties over silicon, with significantly higher breakdown voltage and lower turn-on resistance when it comes to high-speed switching applications. Due to these benefits, SiC stands out as a more suitable material than silicon for such tasks.

Benefits

Silicon carbide semiconductors are utilized in numerous electronic devices, from electric vehicles and solar energy systems to 5G technology. Their distinct thermal and electrical characteristics make them more cost-efficient than their silicon counterparts; hence their popularity has skyrocketed over the years. Demand has skyrocketed accordingly.

Silicon carbide semiconductors offer many advantages for power efficiency, faster switching speeds, reduced device losses and superior resistance to high temperatures and breakdown voltages compared to their silicon counterparts. Furthermore, their more durable construction allows them to stand up better under harsh environmental conditions; all of which contributes to them becoming popular choices for new applications such as electric vehicle charging stations and solar inverters.

IGBTs and bipolar transistors were previously the go-to devices for power electronics applications, yet these devices present multiple challenges such as limited switching frequencies and excessive heat production. SiC devices feature wider band gaps that enable higher switching frequencies with reduced turn-on resistance while also having a lower melting point than silicon which means they can tolerate higher temperatures with ease.

Dependent upon its application, silicon carbide semiconductors may be utilized with other materials like polymers and ceramics, and must therefore be tested thoroughly to ensure both quality and safety – such methods include X-ray fluorescence testing and Glow Discharge Mass Spectrometry (GDMS).

Anwendungen

Silicon carbide is an impressive material capable of revolutionizing power electronics. A wide bandgap semiconductor, silicon carbide offers multiple advantages over its silicon counterparts in terms of handling voltage spikes, faster switching times and lower device losses as well as being resistant to higher temperatures – qualities which make it suitable for electric vehicles, industrial applications and solar inverters alike.

Silicon Carbide (SiC) is the lightest and hardest ceramic material with superior thermal conductivity and chemical resistance against acids and lyes. Additionally, SiC offers electrical insulation 10 times greater than that of silicon with an extremely high breakdown field strength tenfold greater than silicon’s breakdown field strength, being completely non-toxic in its makeup.

SiC power devices have become an indispensable resource in various applications. From enabling electromobility breakthrough to supporting digitization in industrial settings, these power devices have proven themselves useful across a range of sectors and industries. From battery management systems and on-board chargers, to DC/DC converters – SiC devices have quickly become an industry standard, helping make life more sustainable while decreasing charging station costs.

Silicon carbide has revolutionized power electronics due to its unique physical and electronic properties. Being one of the only wide bandgap semiconductors with hexagonal crystalline structure (4H-SiC), silicon carbide makes an excellent material for high voltage power devices that must withstand harsh environments while having faster switching speeds, lower losses, and can even be used at very high frequencies without compromising performance or reliability. This material could potentially replace existing IGBTs or bipolar transistors without any compromise in performance or reliability.

Herstellung

Silicon carbide (SiC) is an extremely versatile semiconductor material. It can be heavily doped both n-type and p-type with nitrogen, phosphorus, aluminium or gallium to achieve metallic conductivity and give pure SiC crystals their signature rainbow-like luster; industrial grades often feature iron impurities that alter its color from brown to black.

This semiconductor’s insulating properties stem from its crystalline structure. Its atomic layers create a tight fit between its valence and conduction bands, making electron movement between layers more challenging – giving it the capacity to withstand nearly ten times as many electric fields than silicon.

Silicon Carbide Schottky diodes offer reduced on-resistance and total gate charge, making them more efficient and faster than their silicon-based counterparts – ideal for power-hungry applications like power converters and switches in electric vehicles (EV) or renewable energy systems.

Manufacturing silicon carbide semiconductors is an intricate process. It involves using several pieces of equipment to produce wafers with surface roughness of less than 1 micron, before polishing with chemical mechanical polishing (CMP) fluid on felt or urethane impregnated pads to remove damage and surface oxidation – this step known as chemical mechanical polishing is crucial in order to prepare substrate surfaces for epitaxial growth while simultaneously maintaining wafer shape stability.

Preisgestaltung

Silicon carbide comes in various forms and applications. From cutting tools and abrasives, to semiconductors and even the translucent mineral moissanite – silicon carbide has long been manufactured synthetically since 1893 in large scale production facilities and found naturally. Being both hard and durable materials it can withstand both high temperatures and mechanical strain without breaking.

Silicon carbide semiconductors are enjoying rapid global market expansion as businesses look for effective power management solutions. Their unique thermal and electrical properties make them popular choices among industrial applications; furthermore, their scalability allows manufacturers to reduce production costs.

Allegro Microsystems is one such company expanding to meet the rising demand for silicon carbide semiconductors. As one of the industry leaders for sensing and power solutions for motor drives, Allegro is expanding to support demand.

Silicon carbide is an integral component of power semiconductors that have become an increasing part of electric vehicle battery chargers, on-board EV charging systems, DC-DC converters, wind turbines and photovoltaic inverters as the demand for renewable energy sources surges. Other key players include II-VI Coherent Corp., Semiconductor Components Industries LLC and WOLFSPEED INC. Silicon carbide’s use as part of power semiconductors is projected to fuel growth within this market segment.