Nano laser direct writing systemIt is a high-precision micro nano processing technology mainly used for micro to nano level graphic or structural processing on material surfaces or thin films. The working principle can usually be understood through the following steps:
1. Generation of laser beam
The core part of the nanolaser direct writing system is the laser source, usually short pulse laser or ultra short laser (such as femtosecond laser), which has high peak power and extremely short pulse duration. After being focused by an optical system, the laser can produce very small laser spots on the surface of the target material.
2. Laser beam focusing
The system will use optical components such as lenses to focus the laser beam onto the surface of the material, typically focusing on areas at the micrometer or even nanometer scale. This process is crucial because the size of the laser beam determines the machining accuracy.
3. Optical response of materials
When the laser interacts with the surface of the target material, the material surface absorbs the laser energy, resulting in a sharp increase in temperature. Depending on the material, the energy of the laser will cause different reactions:
-For metal materials, lasers can cause surface melting, resulting in the formation of precise micro patterns.
-For polymer materials, laser may trigger chemical reactions or decomposition to form the desired microstructure.
4. Scan and Write
The laser beam will be scanned point by point along a predetermined path on the surface of the material through a precision scanning system. By controlling the power, scanning speed, and pulse frequency of the laser, pattern engraving of different shapes and depths can be achieved. The adjustment of these parameters is crucial for controlling the accuracy and effectiveness of machining.
5. High precision positioning
Nanolaser direct writing systems are typically equipped with high-precision positioning systems, such as using scanning electron microscopy (SEM) or atomic force microscopy (AFM) devices for real-time imaging and feedback. This can ensure that the patterns written by the laser are consistent with the designed graphics, and even allow for real-time correction and adjustment.
6. Material removal (etching)
Laser can not only be used for heating and reacting materials, but also for removing materials. By applying appropriate laser energy, materials can be locally evaporated or ablated, forming very fine patterns or pore structures.
Application field
-Nanomanufacturing: Manufacturing microelectronic components, sensors, microfluidic devices, etc.
-Biopharmaceuticals: Manufacturing high-precision biosensors, cell culture scaffolds, etc.
-Materials Science: Used to study the properties and behavior of nanomaterials.
Nanolaser direct writing technology has become one of the most important technologies in the field of micro nano processing due to its ultra-high precision and flexibility.