Low Stress Silicon Nitride Wafers in Stock

Low Stress Silicon Nitride Wafers for Resonators and Waveguide Fabrication

Low stress silicon nitride (SiN) wafers are widely used for the fabrication of optical resonators, photonic integrated circuits (PICs), silicon nitride waveguides, optical filters, frequency combs, and quantum photonic devices. Researchers prefer LPCVD low-stress silicon nitride because it offers excellent optical performance, low propagation loss, and reduced wafer bow compared to standard silicon nitride films.

Research Request Example:

We need 500nm low stress nitride on silicon wafers to fabricate optical resonators and waveguides. Reference Item #3455.

Reference #275637 for specifications and pricing.

UniversityWafer, Inc. supplies low stress silicon nitride on silicon wafers with custom nitride thicknesses, wafer diameters, oxide layers, substrate materials, and LPCVD deposition options for advanced photonics and semiconductor research.

Get Your Low Stress Silicon Nitride Quote FAST! Or, Buy Online and Start Researching Today!

Silicon Nitride on Insulator (SiNOI) Waveguides

Silicon Nitride on Insulator (SiNOI) platforms are increasingly used in integrated photonics because they combine the optical advantages of silicon nitride with the electrical insulation of thermal oxide. These structures support low-loss optical transmission across visible and infrared wavelengths, making them ideal for telecommunications, biosensors, LiDAR systems, quantum computing, and photonic research.

University Research Request:

We are interested in purchasing 5µm thermal oxide on silicon wafers for the development of silicon nitride on insulator waveguides. What is the surface roughness of the oxide layer, and what is the lead time for LPCVD low stress nitride deposition?

Reference #292328 for specifications and pricing.

Available options include thermal oxide thicknesses from hundreds of angstroms to several microns, LPCVD silicon nitride deposition, prime-grade silicon wafers, and custom substrate configurations for waveguide fabrication and photonic device development.

Low Stress Silicon Nitride Applications

Low stress silicon nitride wafers for SAW devices and photonics Low stress silicon nitride (SiN) films are widely used in semiconductor manufacturing, photonics, MEMS fabrication, optical communications, and advanced microelectronic devices. Compared to conventional silicon nitride films, low-stress SiN reduces wafer bow, film cracking, and membrane deformation while maintaining excellent dielectric, optical, and mechanical properties.

Silicon Nitride Waveguides and Photonics

One of the fastest-growing applications for low stress silicon nitride is integrated photonics. SiN waveguides offer low optical loss, high refractive index contrast, and compatibility with CMOS fabrication processes. Researchers use LPCVD silicon nitride films to fabricate optical waveguides, ring resonators, optical filters, frequency combs, and photonic integrated circuits.

MEMS and Microelectromechanical Systems

Low stress silicon nitride is commonly used as a structural material in MEMS devices. Its excellent mechanical strength and low residual stress help prevent warping, cracking, and dimensional changes in suspended membranes, pressure sensors, microfluidic devices, and micromechanical structures.

Semiconductor Device Fabrication

In semiconductor manufacturing, silicon nitride serves as an insulating dielectric layer, diffusion barrier, passivation coating, and hard mask. Low stress SiN films provide outstanding electrical isolation while protecting sensitive device structures during lithography, etching, oxidation, and deposition processes.

Surface Acoustic Wave (SAW) Devices

Low stress nitride films are frequently used in Surface Acoustic Wave (SAW) devices employed in wireless communications, RF filters, oscillators, and sensing applications. The mechanical stability of low-stress silicon nitride helps improve frequency stability and long-term device reliability.

Optical and Photonic Resonators

Researchers developing optical resonators often choose low stress silicon nitride because of its low optical absorption and excellent dimensional stability. Silicon nitride resonators are used in telecommunications, quantum photonics, optical sensing, and integrated laser systems.

Solar Cells and Protective Coatings

Silicon nitride is widely used as an anti-reflective coating and passivation layer in photovoltaic devices. By reducing surface recombination and improving light absorption, SiN coatings help increase solar cell efficiency. The material also provides excellent chemical resistance and wear protection for semiconductor devices and microelectronic components.

How Low Stress Silicon Nitride Wafers Are Manufactured

Low stress silicon nitride films are typically deposited using Low Pressure Chemical Vapor Deposition (LPCVD). During this process, gases such as dichlorosilane (DCS) and ammonia react at elevated temperatures to form a highly uniform silicon nitride layer across the wafer surface.

The LPCVD process allows engineers to carefully control film thickness, refractive index, uniformity, and residual stress. This level of control is critical for photonic devices, MEMS structures, resonators, and semiconductor components where excessive film stress can negatively impact performance.

Low stress silicon nitride can be deposited on silicon wafers, silicon-on-insulator (SOI) wafers, thermal oxide wafers, quartz substrates, and other specialty materials. Film thicknesses can range from tens of nanometers to several microns depending on the application requirements.

Because of its exceptional combination of optical transparency, electrical insulation, chemical resistance, thermal stability, and mechanical strength, low stress silicon nitride remains one of the most important thin-film materials used in modern semiconductor and photonic device fabrication.

Low Stress Silicon Nitride in Stock and Ready to Ship