Single Crystal Quartz Wafers

Single Crystal Quartz Wafers are thin slices of high-purity, single-crystal silicon dioxide (SiO₂) that are precisely cut and polished for various applications. Unlike polycrystalline or fused quartz, single crystal quartz has a well-defined crystal structure, making it highly valuable in electronics, optics, and scientific research.

Key Properties

• Piezoelectricity – Quartz exhibits piezoelectric properties, meaning it generates an electric charge under mechanical stress. This is crucial for frequency control applications.
• High Purity – Single crystal quartz wafers are highly pure, minimizing defects that can impact performance in optical and electronic applications.
• Low Thermal Expansion – Quartz has a very low coefficient of thermal expansion, making it dimensionally stable over temperature variations.
• High Chemical Resistance – Quartz is resistant to acids, alkalis, and most chemical agents, making it suitable for harsh environments.
• Anisotropic Mechanical and Optical Properties – Different crystal orientations exhibit different mechanical and optical behaviors, which is crucial for specific applications.

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Common Applications

• Frequency Control Devices: Quartz wafers are widely used in oscillators, resonators, and filters for timing and frequency control in electronics.
• MEMS (Micro-Electro-Mechanical Systems): Used in sensors, accelerometers, and gyroscopes.
• Optical Applications: High-transparency quartz wafers are used in optics and photonics.
• Semiconductor Industry: Used as a substrate material in specialized applications.
• Research & Development: Utilized in scientific studies involving material properties and surface interactions.

Crystal Orientation

• AT-Cut (35.25° to Z-axis): Most commonly used in oscillators, providing temperature stability.
• BT-Cut (49° to Z-axis): Used in frequency control applications with different temperature characteristics.
• X-Cut (Perpendicular to optical axis): Used in SAW (Surface Acoustic Wave) applications.
• Z-Cut (Parallel to optical axis): Used for optical and piezoelectric applications.

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• Below are just some of the seeded and seedless single cystal quartz wafers that we have in stock!

  Dia	Orien	Thick	Polish	Brand/Grade	SEED
  76.2mm	ST&AT&Z	0.15mm	DSP	SAW	withseed
  76.2mm	42.75ST	0.35mm	SSP	SAW	withseed
  76.2mm	X&Y&Z	0.35mm	SSP	SAW	withseed
  76.2mm	42.75ST	0.50mm	SSP	SAW	withseed
  76.2mm	X&Y&Z	0.50mm	SSP	SAW	withseed
  76.2mm	42.75ST	0.35mm	DSP	SAW	withseed
  76.2mm	X&Y&Z	0.35mm	DSP	SAW	withseed
  76.2mm	42.75ST	0.50mm	DSP	SAW	withseed
  76.2mm	X&Y&Z	0.50mm	DSP	SAW	withseed
  100mm	ST&AT&Z	0.20mm	DSP	SAW	withseed
  100mm	ST-CUT	0.35mm	SSP	SAW	withseed
  100mm	X&Y&Z	0.35mm	SSP	SAW	withseed
  100mm	ST-CUT	0.50mm	SSP	SAW	withseed
  100mm	X&Y&Z	0.50mm	SSP	SAW	withseed
  100mm	ST-CUT	0.35mm	DSP	SAW	withseed
  100mm	X&Y&Z	0.35mm	DSP	SAW	withseed
  100mm	ST-CUT	0.50mm	DSP	SAW	withseed
  100mm	X&Y&Z	0.50mm	DSP	SAW	withseed
  25.4mm	AT&Z-CUT	0.05mm	DSP	SAW	seedless
  50.8mm	AT&Z-CUT	0.10mm	DSP	SAW	withseed
  76.2mm	ST&AT&Z	0.15mm	DSP	SAW	withseed
  150mm	Z-Cut	0.675mm	SSP	SAW	Seedless

  Ask about other quantities as few as one All single crystal quartz wafersshould be growthn from one special seed. And the different cut type will cause the different seed location. One type is inside the wafer names "withseed", the other type is not inside the wafers, so names "seedless".
  
  Orientation 1.AT & BT & SC etc such orientations are for many frequency control application which will be used for many electronic and space application, such as mobile phone and satellite etc; 2.Z cut is for some optical application, such as some windows and lens etc. meanwhile, general speaking, the polishing designations are for reducing the electronic resistence or enlarging the optical transmittance.
  
  Seeded and Seedless Quartz Single quartz crystal is growed from one special seed and then is divided into three zones, x/y & z zones. Sedless means the wafers are in the pure x /y or z zone.
  
  Our "standard" single crystal quartz specs are:
  * Flatness
  Bow: 20um
  Warp: 30um
  * Roughness
  Ra: 6 angstroms (on the polished side)
  
  ST-cut means 42.75째Y -cut, x & y & z cut means 0째X or 0째Y or 0째Z-cut. normally speaking, ST-cut type wafers are for surface acoustic waves application. and other types are for some optical application.