Femtosecond Laser Micro-Machining for Precision Flow Control Components

For industrial fluid and high-purity gas systems, precise flow control, pressure monitoring, and uniform distribution depend on three mission-critical components: precision-machined micro-holes in flanges, VCR Restriction Orifice (RO) gaskets, and custom gas flow splitters. These components demand extreme dimensional consistency, burr-free edges, and zero thermal damage.

The Role of Critical Components: Why Precision Matters

1. Precision Micro-Holes for Flanges

Micro-holes in outlet flanges, orifice flanges, and bleed rings are the backbone of system monitoring, used for Pressure Tapping, Vent & Drain Ports, and Leak Detection.

2. VCR Restriction Orifice (RO) Gaskets: High-Purity Flow Control

A VCR Restriction Orifice (RO) gasket is a metal face-seal component featuring a precision-machined central micro-hole. Used heavily in semiconductor gas panels, they are critical for:

• Precise flow metering in ultra-high purity (UHP) gas delivery.
• Pressure reduction for critical gas cabinets.
• Choked flow control ensuring stable gas distribution.

Mono achieves ultra-tight tolerances (as tight as ±1μm), ensuring the integrity of the VCR sealing face is never compromised.

3. Gas Flow Splitters: Uniform Distribution

Used in wafer fabrication tools and analytical labs, gas flow splitters require extreme hole-to-hole consistency and smooth edges to eliminate turbulence and contamination.

The Hidden Costs of Traditional Machining

Legacy methods often fail to meet the standards required for UHP (Ultra-High Purity) applications:

• Mechanical Drilling: Prone to tool wear and burrs that ruin VCR seal faces.
• EDM: Creates a Heat-Affected Zone (HAZ) and leaves carbon debris.
• Long-Pulse Laser: Causes recast layers and micro-cracks, leading to particle generation.
  
  

The Mono Advantage: Femtosecond Laser Processing

Our cold ablation process removes material via ultra-short pulses (10−15 seconds), offering:

1. Ultra-High Precision

We consistently produce micro-holes with near-perfect roundness and sub-micron accuracy, essential for VCR RO Gaskets.

Figure 1: High-consistency 70μm micro-holes machined by Mono.

2. Burr-Free, Zero HAZ

Eliminates secondary deburring and preserves the 316L stainless steel's corrosion resistance. This is critical for particle-free performance in cleanrooms.

3. Design Flexibility

Supports arbitrary patterns, radial arrays, and materials including Inconel, Hastelloy, Titanium, and Ceramics.

Technical Capabilities & Compliance

• Hole Diameter: 10μm to 1mm (±1μm tolerance).
• Aspect Ratio: Up to 10:1.
• Scalability: From rapid prototyping to mass production.