INDUSTRY COMPONENT

Semiconductor wafer

Semiconductor wafer is a thin slice of semiconductor material used as the substrate for fabricating integrated circuits and discrete semiconductor devices like thyristors and triacs.

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Component Specifications

Definition
A semiconductor wafer is a foundational substrate typically made from high-purity silicon, though other materials like gallium arsenide may be used for specialized applications. For thyristors and triacs, the wafer serves as the base material where multiple layers of doping, metallization, and patterning create the p-n-p-n structures essential for controlled switching. These wafers undergo precise manufacturing processes including crystal growth, slicing, polishing, and cleaning to achieve the required electrical and physical properties.
Working Principle
The wafer provides the crystalline structure where semiconductor junctions are formed through doping processes. In thyristors/triacs, alternating p-type and n-type regions are created on/in the wafer to form the multi-layer structure that enables latching behavior and bidirectional current control. When appropriate gate signals are applied, these structures allow the device to switch between high-impedance (off) and low-impedance (on) states.
Materials
Primary material: Single-crystal silicon with resistivity 1-100 ohm-cm. Dopants: Boron (p-type), Phosphorus (n-type). Alternative materials: Silicon carbide (SiC) for high-temperature applications, Gallium arsenide (GaAs) for high-frequency applications. Surface finish: Chemically-mechanically polished to <1 nm roughness.
Technical Parameters
  • Diameter 100mm, 150mm, 200mm, 300mm
  • Thickness 525μm ± 25μm (for 150mm)
  • Orientation <100> or <111>
  • Resistivity 1-100 Ω·cm
  • Carbon content <0.2 ppma
  • Oxygen content <18 ppma
  • Surface flatness <3 μm TTV
  • Dislocation density <1000/cm²
Standards
ISO 14644-1, SEMI M1, SEMI M59, IEC 60747

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Semiconductor wafer.

semiconductor wafer silicon wafer thyristor wafer triac wafer power semiconductor substrate wafer specifications semiconductor manufacturing Semiconductor wafer in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Thyristor/Triac

A semiconductor switching device used for controlling AC power in solid state relays.

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Engineering Analysis

Risks & Mitigation
  • Crystal defects affecting device performance
  • Contamination from particles or chemicals
  • Wafer warpage during high-temperature processes
  • Breakage during handling and processing
FMEA Triads
Trigger: Improper crystal growth parameters
Failure: Dislocations and stacking faults in wafer
Mitigation: Implement strict process controls during Czochralski growth, regular quality checks using X-ray topography
Trigger: Contaminated polishing slurry
Failure: Surface defects and reduced yield
Mitigation: Use filtered slurry systems, implement particle monitoring, regular equipment maintenance
Trigger: Thermal stress during diffusion processes
Failure: Wafer warpage and cracking
Mitigation: Optimize temperature ramp rates, use proper wafer carriers, implement stress monitoring

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter: ±0.2mm, Thickness: ±25μm, Resistivity: ±10%, Orientation: ±0.5°
Test Method
Four-point probe for resistivity, FTIR for oxygen/carbon content, X-ray diffraction for orientation, surface profilometry for flatness

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between wafers for thyristors and standard IC wafers?

Thyristor wafers typically have thicker epitaxial layers, higher voltage ratings, and different doping profiles compared to standard IC wafers. They're optimized for power handling rather than transistor density.

Can different wafer diameters be used interchangeably?

No, wafer diameter is tied to specific manufacturing equipment. Changing diameters requires complete retooling of fabrication lines and is not interchangeable.

What causes wafer breakage during thyristor manufacturing?

Common causes include thermal stress from rapid temperature changes, mechanical stress from handling equipment, crystal defects, and improper mounting during processing.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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