12-Inch Silicon Carbide (SiC) Wafer – Product Introduction

Product Overview

The 12-inch Silicon Carbide (SiC) wafer represents the next generation of wide bandgap semiconductor substrates, designed to support the large-scale production of high-performance power electronic devices. Compared with conventional 6-inch and 8-inch SiC wafers, the 12-inch format significantly increases usable chip area per wafer, improves manufacturing efficiency, and offers strong potential for long-term cost reduction.

Silicon carbide is a wide bandgap semiconductor material featuring high breakdown electric field strength, excellent thermal conductivity, high saturated electron drift velocity, and outstanding thermal stability. These properties make 12-inch SiC wafers an ideal platform for high-voltage, high-power, and high-temperature applications.

Material and Crystal Specifications

• Material: Single-crystal Silicon Carbide (SiC)

• Polytype: 4H-SiC (standard for power devices)

• Conductivity Type:

  • N-type (Nitrogen doped)

  • Semi-insulating (customizable)

The growth of 12-inch SiC single crystals requires advanced control of temperature gradients, stress distribution, and impurity incorporation. Improved PVT (Physical Vapor Transport) crystal growth technology is typically employed to achieve large-diameter, low-defect SiC boules.

Manufacturing Process

The production of 12-inch SiC wafers involves a series of high-precision processes:

1. Large-diameter single-crystal growth

2. Crystal orientation and ingot slicing

3. Precision grinding and wafer thinning

4. Single-side or double-side polishing

5. Advanced cleaning and comprehensive inspection

Each step is tightly controlled to ensure excellent flatness, thickness uniformity, and surface quality.

Key Advantages

• Higher Device Yield per Wafer: Larger wafer size enables more chips per run

• Improved Manufacturing Efficiency: Optimized for next-generation fabs

• Cost Reduction Potential: Lower cost per device in high-volume production

• Superior Thermal and Electrical Performance: Ideal for harsh operating conditions

• Strong Process Compatibility: Suitable for mainstream SiC power device fabrication

Typical Applications

• Electric vehicles (SiC MOSFETs, SiC Schottky diodes)

• On-board chargers (OBC) and traction inverters

• Fast-charging infrastructure and power modules

• Solar inverters and energy storage systems

• Industrial motor drives and railway systems

• High-end power electronics and defense applications

Typical Specifications (Customizable)

Frequently Asked Questions (FAQ)

Q1: Are 12-inch SiC wafers ready for mass production?
A: 12-inch SiC wafers are currently in the early stage of industrialization and are being actively evaluated for pilot and volume production by leading manufacturers worldwide.

Q2: What are the advantages of 12-inch SiC wafers compared to 8-inch wafers?
A: The 12-inch format significantly increases chip output per wafer, improves fab throughput, and offers long-term cost advantages.

Q3: Can wafer specifications be customized?
A: Yes, parameters such as conductivity type, thickness, polishing method, and inspection grade can be customized.