In modern precision manufacturing, ultra-thin stainless steel sheets-typically ranging from 0.05 mm to 0.5 mm in thickness-have become a core material for high-end industries such as electronics, medical devices, and aerospace. However, their combination of extreme thinness, high strength, and toughness makes precision micro-drilling far more challenging than conventional metal processing.
Laser Micro-Drilling for Ultra-Thin Stainless Steel
At YCLaser, our high-precision laser drilling equipment is designed for highly efficient processing of ultra-thin stainless steel. Laser drilling is the most widely used non-contact technique for stainless steel sheets. It uses a high-energy-density laser beam to instantly melt and vaporize the material, creating fine, precise holes without mechanical contact.
Nanosecond pulsed lasers (ns) are the most cost-effective choice, with pulse widths ranging from 1 to 100 ns. Heat has time to diffuse slightly into surrounding material, forming a 5–20 μm thick recast layer along the hole walls and a heat-affected zone (HAZ) of several tens of microns. For applications requiring ±0.01 mm hole diameter accuracy-where downstream processes can remove the recast layer chemically-nanosecond lasers offer the best value. Common wavelengths include 1064 nm (fundamental) and 532 nm (frequency-doubled), the latter providing better energy focus for smaller holes.
Key Advantages:
Non-contact process with no cutting forces, preventing deformation of ultra-thin sheets.
Capable of producing micro-holes smaller than 10 μm in diameter.
Supports complex hole shapes: round, irregular, and conical.
High processing speed, ideal for integration into automated production lines.
Typical Applications
1. Smartphone and Wearable Device Meshes
Dense circular hole arrays → speaker grilles, microphone dust covers
Rectangular hole arrays → earpiece grids
0.5 mm stainless steel balances strength with thinness, and small-batch processing matches smartphone part features perfectly.
2. Chip Shields / EMI Covers
Metal shields on smartphone motherboards block electromagnetic interference and often feature small ventilation or signal test holes. Dense micro-hole arrays like these are widely used in Huawei, Xiaomi, and other brand devices.
3. Battery Protection Plate Ventilation
In new energy battery modules, stainless steel sheets used for insulation and heat dissipation require evenly spaced through-holes to improve thermal management and reduce weight.
4. Precision Filter Screens
Used in industrial fluid filtration and medical device chambers, circular hole arrays allow precise control over filtration accuracy.
5. Sensor Diaphragms
Air inlet holes on pressure and gas sensor casings demand high uniformity, with laser drilling achieving ±0.01 mm precision.
