Ceramic Vacuum Chuck —— High-Precision, Zero-Deformation Substrate Handling

In advanced semiconductor, optical, and flat-panel display manufacturing, holding ultra-thin and fragile substrates without distortion or contamination is critical. Our Ceramic Vacuum Chucks are high-precision workholding systems engineered using porous or micro-channel advanced technical ceramics. By distributing vacuum pressure evenly across the entire contact area, they provide high holding force while preventing local strain, bowing, or surface scratching on delicate workpieces.

Technical Mechanisms & Configurations

We offer two primary structural designs tailored to specific handling and processing requirements:

• Porous Ceramic Vacuum Chucks: Manufactured with an interconnected micro-porous structure ($1 mutext{m} sim 10 mutext{m}$ pore size). Air is drawn uniformly across the entire ceramic surface, allowing for ultra-flat clamping of flexible films, thin wafers, and glass without leaving suction marks or localized pin-deformations.

• Pin-Type / Micro-Groove Ceramic Chucks: Features a dense ceramic body with precision-machined micro-pins or vacuum grooves. This design minimizes the contact area with the substrate, drastically reducing particle contamination on the back side of wafers.

Key Advantages

1. Ultra-High Planarity & Thermal Stability

Made from high-density ceramics such as Silicon Carbide ($SiC$) or Alumina ($Al_2O_3$), these chucks exhibit extremely low thermal expansion coefficients. They maintain flatnesses of $le 1 mutext{m}$ across large diameters even under elevated temperature processes.

2. Micro-Defect & Contamination Prevention

Unlike traditional metal chucks that can mar, scratch, or transfer metallic ions to sensitive substrates, technical ceramics are non-contaminating, highly wear-resistant, and non-magnetic.

3. Exceptional Chemical Inertness

Impenetrable to chemical corrosion, making them ideal for spin-coating, wet etching, chemical mechanical planarization (CMP), and photoresist processing.

4. ESD Safe (Electrostatic Discharge Protection)

Available in conductive or semi-conductive ceramic grades to safely dissipate static charges during wafer loading, inspection, and unloading, preventing static damage to micro-electronic devices.

Typical Applications