4inch Sapphire Wafer 200um Thickness C Axis Highly Applied for Semiconductor
Product Description:
Sapphire wafers are composed of aluminum oxide (Al₂O₃), in which
three oxygen atoms are covalently bonded to two aluminum atoms.
They exhibit a hexagonal lattice crystal structure and are commonly
cut along the A-plane, C-plane, and R-plane orientations. Owing to
their broad optical transparency range, sapphire wafers transmit
light from the near-ultraviolet (190 nm) to the mid-infrared
wavelengths, making them an ideal choice for optical components,
infrared devices, high-power laser windows, and photomask
materials. Sapphire wafers are renowned for their high acoustic
velocity, high-temperature resistance, corrosion resistance, high
hardness, excellent transparency, and high melting point (2045°C).
They are a challenging material to process, but are widely used in
optoelectronic devices.
Product Parameters:
| Diameter: | 4inch or 100±0.1mm |
| Thickness: | 200±15um；500 ± 15 um,650±15um； |
| Roughness: | Ra ≤ 0.2 nm |
| Warp: | ≤ 10um |
| TTV: | ≤ 10um |
| Polish: | DSP (Double Side Polished); SSP(Single Side Polished) |
| Shape: | Round, Flat, Notch |
| Wafer Orientation: | C Axis |
| Edge Form: | 45°, C shape |
| Material: | Sapphire |
| Remarks: | All specifications above can be customized upon your request. |
Product Pictures:
Product Highlights:
* Sapphire wafers are with common crystallographic orientations
include C‑plane (0001), A‑plane (11‑20), and R‑plane (1‑102); the
choice of orientation tailors optical, mechanical, and epitaxial
behavior for specific devices.
* Typical optical transmission spans the near‑UV to mid‑infrared
(approximately 0.19–5.5 μm), with high transparency in the 0.3–5 μm
range, supporting applications in optics and optoelectronics.
* Mechanical and thermal properties of sapphire wafers include a
Mohs hardness of 9, high strength and wear resistance, and a
melting point ~2050°C, enabling performance under extreme
environments.
* Chemical stability of sapphire wafers is excellent—resistant to
most acids and alkalis—with notable attack only by HF, phosphoric
acid, and molten KOH at elevated temperatures.
* Representative applications of sapphire wafers: LED substrates
(GaN on sapphire), infrared and laser windows, optical components,
and wear‑resistant covers in consumer electronics.
Related Product Recommendation:
150mm 6 Inch Sapphire Substrate Al2O3 DSP Ssp 1.0mmt For Led PSS Customized
Q&A:
Q: What is a sapphire wafer?
A: A sapphire wafer is a circular thin slice made of sapphire
material, which is widely used in the manufacturing of
semiconductors and optical devices.
Q: What size are sapphire wafers?
A: 2inch, 3inch, 4inch, 6inch, 8inch, 12inch.
Q: How to cut a sapphire wafer?
A: Cutting a sapphire wafer requires specialized methods due to its
extreme hardness (9 on the Mohs scale, second only to diamond) and
brittleness. The core approach relies on abrasive-based or
laser-based techniques to achieve precise, low-damage cuts.
