Ultra-thin etched copper sheets are sheets of copper with very fine thicknesses (often below 0.2mm) that have been processed using chemical etching to create micro-precision patterns, apertures, or designs.

Chemical etching:

• Removes material chemically, not mechanically 
• Maintains copper’s natural conductive and mechanical properties 
• Allows for extremely fine and complex features without causing heat or stress deformation 

At TMN, we transform flat copper sheets into advanced functional components — efficiently, accurately, and with no compromise on quality.

Benefits of TMN’s Ultra-Thin Etched Copper Sheets

Choosing TMN Metal Parts Fabrications gives you access to a range of technical and commercial advantages:

1. Extreme Precision

• Feature sizes as small as 0.025mm 
• Hole positioning tolerance of ±0.01mm 
• Clean, burr-free edges and high-definition features 

We can achieve intricate designs and dense patterns that are impossible with traditional cutting or punching methods.

2. No Heat or Mechanical Stress

Our etching process introduces no thermal distortion, no hardening, and no micro-cracks. The original properties of the copper — such as its conductivity and flexibility — remain fully intact.

3. Complex and Flexible Designs

Photo chemical etching supports the most challenging designs:

• Fine meshes 
• Micro hole arrays 
• Thin circuit patterns 
• Precision apertures 
• Logos, serial numbers, and text engraving 

TMN offers complete freedom to innovate and customize your copper components.

4. Rapid Prototyping and Cost Efficiency

Since tooling involves only photo masks, design modifications are fast, inexpensive, and straightforward — ideal for R&D, prototyping, and flexible volume production.

5. Consistent, High-Quality Results

TMN uses advanced equipment and strict quality control systems to ensure uniform results, whether you need ten sheets or ten thousand.

Applications of Ultra-Thin Etched Copper Sheets

Our ultra-thin etched copper sheets power innovation across industries:

Electronics and Semiconductors

• Flexible printed circuits (FPCs) 
• EMI/RFI shielding components 
• High-frequency antennas 
• Heat sinks and spreaders 
• Micro battery connectors 

Aerospace and Defense

• Lightweight electrical systems 
• Signal transmission components 
• Shielded enclosures 
• Precision sensor parts 

Medical Devices

• Diagnostic sensors 
• Wearable electronics 
• Microfluidic devices 
• Implants requiring conductive parts 

Renewable Energy

• Solar panel busbars 
• Fuel cell plates 
• Battery management system parts 

Industrial

• Fine filtration systems 
• Precision nozzle plates 
• High-performance sensors 

Thanks to copper’s unique properties and TMN’s etching precision, the possibilities are almost limitless.

TMN’s Etching Process for Copper Sheets

Here’s how we bring ultra-thin etched copper sheets to life:

1. Design and Phototooling:
   Your CAD design is digitally transferred to a high-resolution photo mask, defining every detail of your pattern. 
2. Copper Sheet Preparation:
   The copper sheets are cleaned thoroughly to ensure a flawless surface for the etching process. 
3. Photoresist Coating and UV Exposure:
   A UV-sensitive photoresist is applied. UV light exposure through the photo mask hardens specific areas to protect them during etching. 
4. Development and Chemical Etching:
   The unexposed resist is removed, and the exposed copper areas are etched away using a highly controlled chemical solution. 
5. Stripping and Finishing:
   After etching, the remaining photoresist is stripped, and the sheets are cleaned and inspected. 
6. Quality Control:
   TMN’s rigorous inspection process ensures every etched copper sheet meets the highest standards for precision, quality, and performance. 

Materials and Thickness Options

At TMN, we primarily work with:

• Pure copper (C110, C101 grades) 
• Copper alloys (e.g., beryllium copper) 
• Thicknesses ranging from 0.010mm to 0.2mm 

Ultra-thin sheets around 0.02mm to 0.15mm are especially popular for microelectronics, sensors, and precision shielding.

We can advise you on the best material and thickness to match your application needs.

Surface Finishes and Post-Processing

TMN offers a variety of surface treatments to enhance functionality or appearance:

• Matte, satin, or bright finishes 
• Tin plating, nickel plating, or gold plating 
• Adhesive backing for easy integration 
• Laminating for flexible circuits 

These options allow you to customize your etched copper sheets for specific technical or aesthetic requirements.

Why Choose TMN Metal Parts Fabrications?

TMN Metal Parts Fabrications stands out as a reliable, innovative partner for high-precision metal solutions. Here’s why:

• ISO-Certified Manufacturing Processes 
• Expert Engineering Support 
• Quick Turnarounds and Flexible Volumes 
• Prototyping and Mass Production Capabilities 
• Uncompromising Quality Assurance 

We are committed to delivering parts that empower your technology, speed up your development cycles, and bring your designs to life with unmatched precision.

Partner with TMN Today

When it comes to ultra-thin etched copper sheets, precision, expertise, and quality matter. At TMN Metal Parts Fabrications, we combine state-of-the-art etching technology with decades of experience to help you achieve success — every step of the way.