12 Inch Sapphire Wafer for High-Volume Semiconductor Manufacturing

Short Description:

The 12 inch sapphire wafer is designed to meet the growing demand for large-area, high-throughput semiconductor and optoelectronic manufacturing. As device architectures continue to scale and production lines move toward larger wafer formats, sapphire substrates with ultra-large diameters offer clear advantages in productivity, yield optimization, and cost control.

Send email to us

Features

Detailed Diagram

Introduction of 12 inch sapphire wafer

Manufactured from high-purity single-crystal Al₂O₃, our 12 inch sapphire wafers combine excellent mechanical strength, thermal stability, and surface quality. Through optimized crystal growth and precision wafer processing, these substrates deliver reliable performance for advanced LED, GaN, and special semiconductor applications.

Material Characteristics

Sapphire (single-crystal aluminum oxide, Al₂O₃) is well known for its outstanding physical and chemical properties. 12 inch sapphire wafers inherit all the advantages of sapphire material while providing a much larger usable surface area.

Key material characteristics include:

Extremely high hardness and wear resistance
Excellent thermal stability and high melting point
Superior chemical resistance to acids and alkalis
High optical transparency from UV to IR wavelengths
Excellent electrical insulation properties

These characteristics make 12 inch sapphire wafers suitable for harsh processing environments and high-temperature semiconductor manufacturing processes.

Manufacturing Process

The production of 12 inch sapphire wafers requires advanced crystal growth and ultra-precision processing technologies. The typical manufacturing process includes:

Single Crystal Growth
High-purity sapphire crystals are grown using advanced methods such as KY or other large-diameter crystal growth technologies, ensuring uniform crystal orientation and low internal stress.
Crystal Shaping and Slicing
The sapphire ingot is precisely shaped and sliced into 12 inch wafers using high-accuracy cutting equipment to minimize subsurface damage.
Lapping and Polishing
Multi-step lapping and chemical mechanical polishing (CMP) processes are applied to achieve excellent surface roughness, flatness, and thickness uniformity.
Cleaning and Inspection
Each 12 inch sapphire wafer undergoes thorough cleaning and strict inspection, including surface quality, TTV, bow, warp, and defect analysis.

Applications

12 inch sapphire wafers are widely used in advanced and emerging technologies, including:

High-power and high-brightness LED substrates
GaN-based power devices and RF devices
Semiconductor equipment carrier and insulating substrates
Optical windows and large-area optical components
Advanced semiconductor packaging and special process carriers

The large diameter enables higher throughput and improved cost efficiency in mass production.

Advantages of 12 Inch Sapphire Wafers

Larger usable area for higher device output per wafer
Improved process consistency and uniformity
Reduced cost per device in high-volume production
Excellent mechanical strength for large-size handling
Customizable specifications for different applications

Customization Options

We offer flexible customization for 12 inch sapphire wafers, including:

Crystal orientation (C-plane, A-plane, R-plane, etc.)
Thickness and diameter tolerance
Single-side or double-side polishing
Edge profile and chamfer design
Surface roughness and flatness requirements

Parameter	Specification	Notes
Wafer Diameter	12 inch (300 mm)	Standard large-diameter wafer
Material	Single-crystal Sapphire (Al₂O₃)	High-purity, electronic/optical grade
Crystal Orientation	C-plane (0001), A-plane (11-20), R-plane (1-102)	Optional orientations available
Thickness	430–500 μm	Custom thickness available upon request
Thickness Tolerance	±10 μm	Tight tolerance for advanced devices
Total Thickness Variation (TTV)	≤10 μm	Ensures uniform processing across wafer
Bow	≤50 μm	Measured over the entire wafer
Warp	≤50 μm	Measured over the entire wafer
Surface Finish	Single-side polished (SSP) / Double-side polished (DSP)	High optical quality surface
Surface Roughness (Ra)	≤0.5 nm (polished)	Atomic-level smoothness for epitaxial growth
Edge Profile	Chamfer / Rounded edge	To prevent chipping during handling
Orientation Accuracy	±0.5°	Ensures proper epitaxial layer growth
Defect Density	<10 cm⁻²	Measured by optical inspection
Flatness	≤2 μm / 100 mm	Ensures uniform lithography and epitaxial growth
Cleanness	Class 100 – Class 1000	Cleanroom compatible
Optical Transmission	>85% (UV–IR)	Depends on wavelength and thickness

12 Inch Sapphire Wafer FAQ

Q1: What is the standard thickness of a 12 inch sapphire wafer?
A: The standard thickness ranges from 430 μm to 500 μm. Custom thicknesses can also be produced according to customer requirements.

Q2: What crystal orientations are available for 12 inch sapphire wafers?
A: We offer C-plane (0001), A-plane (11-20), and R-plane (1-102) orientations. Other orientations can be customized based on specific device requirements.

Q3: What is the total thickness variation (TTV) of the wafer?
A: Our 12 inch sapphire wafers typically have a TTV ≤10 μm, ensuring uniformity across the entire wafer surface for high-quality device fabrication.

About Us

XKH specializes in high-tech development, production, and sales of special optical glass and new crystal materials. Our products serve optical electronics, consumer electronics, and the military. We offer Sapphire optical components, mobile phone lens covers, Ceramics, LT, Silicon Carbide SIC, Quartz, and semiconductor crystal wafers. With skilled expertise and cutting-edge equipment, we excel in non-standard product processing, aiming to be a leading optoelectronic materials high-tech enterprise.