As the third-generation wide-bandgap semiconductor industry develops rapidly, 4H-semi-insulating silicon carbide (4H-SiC) substrates—core carriers for GaN epitaxy—directly determine the performance and reliability of downstream RF and power devices. Procurement quality is critical for controlling production

Abstract: Gallium Nitride (GaN), a core third-generation wide-bandgap semiconductor, is widely used in high-end fields due to its excellent properties. The quality of GaN epitaxy highly depends on substrates, and 4H-semi-insulating silicon carbide (4H-SiC) substrates have become the preferred choice for high-end GaN he

The core requirements of RF devices (such as 5G/6G base station power amplifiers, satellite communication devices, and national defense radars) are low loss, high power, high-frequency response, and long-term reliability. 4H-semi-insulating SiC (silicon carbide) substrates, with their unique material properties, perfec

In GaN-based LED devices, sapphire substrates (Al₂O₃) are the most widely used epitaxial substrates. However, conventional flat sapphire wafers face intrinsic challenges such as lattice mismatch with GaN and limited light extraction efficiency. To overcome these bottlenecks, Patterned Sapphire Substrates (PSS) and th

Sapphire substrates play a critical role in modern LED manufacturing. As one of the most widely used materials for GaN-based LEDs, sapphire (Al₂O₃) offers a reliable platform for epitaxial growth and large-scale device production.
Today, LEDs are used in a wide range of applications including general lighting, displa

Gallium nitride (GaN) has become a key material for modern electronics and optoelectronics, widely used in power devices, LEDs, RF components, and ultraviolet detectors. One of the most commonly used substrates for GaN epitaxy is sapphire (Al₂O₃). Thanks to its stable physical properties and mature manufacturing ecos

Molybdenum disulfide (MoS₂), a representative two-dimensional transition metal dichalcogenide (TMD), exhibits excellent semiconductor properties, optical transparency, and mechanical flexibility. These characteristics make it highly promising for applications in flexible electronics, optoelectronics, and quantum devic

The hardness of crystalline materials is one of the most critical factors determining the selection of cutting, grinding, and polishing processes. It directly influences machining efficiency, tool wear, process parameters, cost control, and final product quality. Differences in hardness significantly affect tool select

Thermal conductivity is a critical property of semiconductor substrate materials. It directly affects heat dissipation efficiency, device power density, and operational reliability. The thermal performance of a substrate is determined by factors such as crystal structure, lattice order, impurity concentration, and defe

Diamond substrates, with ultra-high thermal conductivity (up to 2000 W/(m·K)), excellent chemical inertness, and a wide bandgap, are ideal heat-spreading materials for heterogeneous integration of wide bandgap semiconductors such as GaN and SiC. Wafer bonding is the key integration pathway between diamond and se