Plasma-Treated Double-Layer Target Tape for Micro Laser Thrusters
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Solution Overview
Problem
In micro laser thrusters, a weak interlayer interfacial bonding force between the transparent film substrate and the coating working medium leads to sputtering or bulging during laser ablation, significantly reducing propulsive performance.
Innovation Solution
A low-temperature plasma treatment is applied to the transparent film substrate to increase its surface energy and adhesive force, enhancing the interfacial bonding with the coating working medium, thereby preventing sputtering and bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent film substrate is coated with an ablation working medium to form a double-layer target tape, then the laser beam can be transmitted through the substrate to ablate the working medium and generate thrust, but the interfacial bonding force between the substrate and working medium is weak, causing interlayer peeling or tearing during ablation
Solution Approach 1:
The patent applies plasma treatment to the transparent film substrate surface before coating the ablation working medium. This preliminary action modifies the substrate surface properties (increasing surface energy and creating active groups) to enhance adhesion, preventing interlayer peeling or tearing during subsequent laser ablation processes.
Solution Approach 2:
The patent changes the physical and chemical parameters of the substrate surface through plasma treatment, including surface energy, surface roughness, and chemical composition (introduction of active groups). These parameter changes improve the interfacial bonding force between the substrate and the ablation working medium coating.
2Power
If the pulse laser beam ablates the coating working medium to generate high-temperature high-speed ablation plume, then thrust is generated, but the reaction force causes interlayer peeling or tearing between the substrate and working medium
Solution Approach 1:
The plasma treatment is performed before coating to preliminarily strengthen the substrate surface, preparing it to withstand the mechanical stress from ablation plume reaction forces without experiencing interlayer peeling or tearing.
Solution Approach 2:
The enhanced interfacial bonding force created by plasma treatment acts as a cushioning mechanism that absorbs and resists the reaction forces from the ablation plume, preventing interlayer failure during the high-stress ablation process.
3Reliability
If the transparent film substrate is treated with low-temperature plasma to enhance surface energy and adhesive force, then the interfacial bonding force increases by approximately 50%, but the treatment process adds complexity to the preparation method
Solution Approach 1:
The patent replaces mechanical adhesion methods with plasma-based surface modification. The plasma treatment creates chemical and physical changes on the substrate surface that enhance bonding without requiring additional mechanical fastening or complex coating procedures.
Solution Approach 2:
The plasma treatment process modifies surface parameters (energy, roughness, chemistry) in a controlled manner to achieve the desired bonding enhancement while maintaining a relatively simple and scalable preparation process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the interfacial bonding force by approximately 50%, improving the propulsive performance of the micro laser thruster and maintaining light transmission of the substrate material.
Implementation Method 1
a method for treating a surface of a transparent film substrate with a low-temperature plasma is used to increase surface energy of a film and an adhesive force of a working medium layer on a surface of the film
Implementation Method 2
treating a surface of a transparent film substrate by a plasma... to increase surface energy of a film
Implementation Method 3
a laser propulsion technology is used for forming an ablation plume sprayed at a high temperature, under a high pressure and at a high speed by ablating a working medium by a pulse laser beam having high power density
Implementation Method 4
ablating a working medium by a pulse laser beam... to form an ablation plume
Data Source
AI summary
Provided is a preparation method for a double-layer working medium target tape with a plasma-enhanced interfacial bonding force for a micro laser thruster. Aiming at the problem that in an existing micro laser thruster, when a working medium is ablated by a laser beam, due to a weak interlayer interfacial bonding force between a transparent film substrate and the coating working medium, sputtering or bulging occurs, which remarkably reduces propulsive performance, a method for treating a surface of a transparent film substrate with a low-temperature plasma is used to increase surface energy of a film and an adhesive force of a working medium layer on a surface of the film, thereby enhancing the interlayer interfacial bonding force. According to the method in the present disclosure, the transparent film substrate is treated with the low-temperature plasma.