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Silicon (Si) CNC Machining Services

Precision Silicon CNC machining services for semiconductor, MEMS, photonics, optics, and vacuum applications. We manufacture custom silicon wafers, pocket wafers, precision substrates, structural parts, and custom silicon components with tight tolerances for prototype and low-volume production.

Custom silicon pocket wafer with precision cavities for MEMS and semiconductor applications

Material Properties & Advantages

12-inch silicon wafer for wafer thinning and back grinding processing with ultra-flat reflective surface on a clean gray-blue background

Why Silicon (Si) for Precision Machining?

Silicon (Si) is widely used in semiconductor, MEMS, photonics, and optical applications. We machine monocrystalline and polycrystalline silicon into precision wafers, substrates, pocket wafers, and custom components for prototype and low-volume production.

Typical Machined Silicon Components

  • Pocket Wafers
  • Silicon Wafers
  • Precision Substrates
  • MEMS Components
  • Semiconductor Fixtures
  • Custom Silicon Parts

Key Advantages of Silicon (Si):

Semiconductor-Grade Material
– High-purity silicon for semiconductor, MEMS, and photonics applications.
Low Thermal Expansion
– Excellent dimensional stability for precision and vacuum applications.
High Hardness & Stiffness
– Supports precision micro-features and high dimensional accuracy.
Excellent Chemical Resistance
– Resistant to most chemicals and process environments (except HF).
Precision CNC Machinable
– Suitable for wafers, pocket wafers, substrates, and custom components.

Silicon Specifications & Datasheets

We provide precision CNC machining services for semiconductor-grade silicon (Si), including wafers, substrates, pocket wafers, and custom precision components.

Silicon (Si)

Hardness
Density
Thermal Conductivity
Electrical Resistivity

~6.5–7 (Mohs)

2.33 g/cm³

~120 – 150 W/m·K

10⁻³ – 10⁵ Ω·cm

Wear Resistance
Chemical Resistance
Flexural Strength
Compressive Strength

Moderate to Good

Excellent

~150 – 300 MPa

>1,000 MPa

Available Silicon Material Options

A variety of semiconductor-grade silicon materials and custom specifications are available to meet your application requirements.

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Precision Silicon Machining Capabilities

Challenges & Solutions
Silicon is a brittle material that requires specialized machining processes to minimize edge chipping, microcracks, and dimensional variation. Typical Machining Capabilities:

Diamond Grinding – High flatness and parallelism
Pocket Wafer Machining – Precision pockets and recessed features
Micro Slots & Holes – Fine features with minimal edge chipping
Optical Surface Polishing – Mirror-finish surfaces for optical applications
Precision CNC Milling – Complex custom silicon components

Applications of Silicon (Si)

Silicon is indispensable in industries where electrical control, high purity, and dimensional accuracy are essential.
Industries Served:

Semiconductor Equipment – Wafer handling, fixtures, electrostatic components, and precision stages
MEMS – Sensors, microstructures, and silicon substrates
Photonics & Optics – Optical mounts, infrared components, and precision substrates
Vacuum Systems – Precision silicon parts for cleanroom and vacuum environments
Research & Laboratory – Custom silicon components for scientific instruments
Post-Processing Options for Silicon

Enhance the performance, surface quality, and functionality of silicon components with our precision post-processing services for semiconductor, MEMS, photonics, and optical applications.

Wafer Back Grinding & Thinning

Precision wafer back grinding and thinning to achieve tight thickness tolerances and excellent flatness for semiconductor applications.

Chemical-Mechanical Polishing (CMP)

Ultra-flat, mirror-quality surfaces with excellent planarity for semiconductor and optical applications.

Silicon Etching

Chemical or plasma etching for surface preparation and semiconductor processing.

Precision Cleaning

Removes particles, machining residues, and surface contaminants to meet semiconductor and cleanroom requirements.

Insulating Thin-Film Coatings

Thin-film dielectric coatings, including thermal oxide, PVD, CVD, and ALD processes, for electrical insulation and semiconductor applications.

Laser Marking

Permanent identification and traceability marking for wafers and precision silicon components.

Additional Ceramics We Support

In addition to Silicon, we offer precision CNC machining services for other hard technical ceramics:

Alumina (Al₂O₃)

Alumina (Al₂O₃) is a durable ceramic used for high-strength, high-temperature parts in precision industries.

Zirconia (ZrO₂)

High fracture toughness and wear resistance.

Boron Nitride (BN)

Excellent thermal conductivity and electrical insulation.

Quartz

Used for optical and semiconductor applications.

Looking for more ceramic machining options? Check out our Capabilities.

Request a Quote for Silicon CNC Machining Today

Looking for high-precision Silicon machining? InstaVoxel delivers expert CNC machining, fast lead times, and superior quality. Contact us today to discuss your project.

Silicon (Si) FAQs