Semiconductor/EMI Markets
Semiconductor CNC & EMI Shielding
How to Achieve 90dB+ EMI Shielding with Custom Multi‑Layer CNC Machined Components for Semiconductor Equipment?
Big Stone Machinery delivers fully customizable 1‑ to 3‑layer EMI shielding solutions, integrated with precision CNC machining for semiconductor vacuum and cleanroom environments. Choose mesh counts from 20 to 400, metals from copper to stainless steel, and carrier thicknesses from 0.3mm PET to 7mm glass — all engineered for shielding effectiveness beyond 90dB.
Big Stone Machinery Co., Ltd. (Taiwan) provides premier manufacturing solutions for the semiconductor industry. We integrate Precision CNC Machining with Advanced EMI Shielding Technology, offering 1 to 3 layers of composite metal mesh structures. We support a wide variety of mesh materials including Red Copper, Brass, and Stainless Steel to meet extreme high-frequency interference requirements.
What Precision CNC Machining Capabilities Do We Offer for Semiconductor Equipment?
1. CNC Precision Parts Machining (Stainless Steel / Aluminum)
Specializing in SUS304/316L and 6061/7075 aluminum alloys. We provide high-stability precision machining for high-vacuum and highly corrosive environments critical to semiconductor equipment.
2. Advanced EDM & Precision Mold Development
Providing micron-level tolerance services for high-hardness materials and complex geometries that traditional CNC cannot achieve, satisfying the needs of semiconductor packaging and testing molds.
3. Professional Surface Treatment & Anodizing
Includes hard-coat anodizing, sandblasting, and precision polishing. We enhance ESD protection and wear resistance to ensure products comply with strict cleanroom standards.
How Can You Customize EMI Shielding Layers, Mesh, and Materials?
Our EMI shielding materials offer the highest flexibility in the industry, configurable for shielding effectiveness from 40dB to over 90dB+:
- Layer Customization: Supports 1, 2, or 3 layers of composite mesh. More layers provide significantly higher shielding effectiveness.
- Mesh Count: Extensive selection from 20 Mesh to 400 Mesh.
- Metal Materials: Options include Red Copper, Brass, Stainless Steel, or Nylon Mesh.
- Shielding Glass Carrier: Standard 4.5mm, with custom thickness available from 3mm to 7mm.
- Shielding PET Carrier: Standard 1.5mm, with an ultra-thin 0.3mm option for high flexibility and lightweight applications.
- Flexible Combinations: Mesh count, layers, and carrier thickness can be mixed and matched freely to optimize transparency and shielding ratios.
Note: Due to the nature of precision metal weaving, organic micro-wrinkles may occur on the mesh surface; this is a natural characteristic and does not compromise EMI shielding effectiveness.
| Customizable Item | Range / Material Options | Application Advantage |
|---|---|---|
| Mesh Layers | 1 / 2 / 3 Layers | Maximize dB Shielding Performance |
| Mesh Count | 20 - 400 Mesh | Balance Transparency & Frequency Blocking |
| Metal Type | Copper, Brass, Stainless, Nylon | Conductivity & Corrosion Resistance |
| Glass Thickness | 3mm - 7mm (4.5mm Std) | Structural Rigidity & Observation Windows |
| PET Thickness | 0.3mm - 1.5mm | Flexibility & Ultra‑thin Lightweighting |
How to Select the Right EMI Shielding Configuration for Your Semiconductor Tool
Follow these steps to determine the optimal combination of layers, mesh, and carrier for your specific EMI requirements.
Step 1 – Define Your Attenuation Target: Determine the minimum shielding effectiveness (e.g., 60dB, 90dB+) based on your equipment's EMI exposure.
Step 2 – Choose the Mesh Layer Count: For moderate shielding, 1 layer may suffice; for extreme high‑frequency noise, select 2 or 3 composite layers.
Step 3 – Pick the Mesh Count and Material: Higher mesh counts (100–400) block higher frequencies. Select copper for conductivity, stainless steel for corrosion resistance.
Step 4 – Select Carrier Type and Thickness: Use glass (3‑7mm) for observation windows; use PET (0.3‑1.5mm) for flexible, lightweight covers.
Frequently Asked Questions About Our EMI Shielding & CNC Machining
Q: What is the maximum EMI shielding effectiveness you can achieve?
A: Our 3‑layer copper mesh solutions can achieve shielding effectiveness beyond 90dB, suitable for the most demanding semiconductor equipment.
Q: Can I customize the thickness of the shielding glass or PET?
A: Yes. Glass thickness is available from 3mm to 7mm, and PET from 0.3mm ultra‑thin to 1.5mm.
Q: What metal mesh materials do you offer?
A: We provide Red Copper, Brass, Stainless Steel, and Nylon Mesh. Copper offers the best conductivity, while stainless steel excels in corrosive environments.
Q: Do the micro‑wrinkles on the mesh affect shielding performance?
A: No. These are a natural result of precision weaving and do not compromise the EMI shielding effectiveness.
Q: What CNC machining tolerances can you hold for semiconductor parts?
A: We routinely achieve micron‑level tolerances using advanced EDM and multi‑axis CNC, meeting the strict requirements of vacuum and cleanroom applications.