FDA
FDA 21 CFR 1040.10 - Laser Product Performance Standards
Ikmanda RoswatiPh.D.Indonesia
Ultrafast Laser Physics and Material InteractionsPublished
Dec 16, 2025
Gallium Nitride Laser Cleaning
Gallium Nitride shows hardness and density. This compound resists oxidation, thus maintains surface integrity during laser cleaning. Smoothness aids uniform contaminant removal, yet stiffness challenges precise ablation. Benefits include durability and corrosion resistance for semiconductor processing.
Laser-Material Interaction
Thermal Destruction
2,773
K
1,502
2,773
1,696
Laser Absorption
0.12
1.9e4
0.12
1.1e6
Laser Damage Threshold
0.92
J/cm²
0.47
0.92
8.9
Ablation Threshold
0.35
J/cm²
1.2
0.35
2
Thermal Diffusivity
4.3e-5
m²/s
2.4e-5
4.3e-5
9.2e-5
Thermal Expansion
5.6e-6
K^{-1}
2e-6
5.6e-6
6e-6
Specific Heat
505
J/(kg·K)
300
505
900
Thermal Conductivity
130
W/m·K
0.2
130
156
Laser Reflectivity
0.18
0.3
0.18
0.36
Gallium Nitride Laser Cleaning Material Characteristics
Density
6.2
g/cm³
2.2
6.2
5.5
Surface Roughness
0.2
μm
0
0.2
0.4
Tensile Strength
300
MPa
30.8
300
255
Youngs Modulus
295
GPa
81.1
295
1.5e11
Hardness
15
GPa
2
15
2,600
Flexural Strength
350
MPa
79.9
350
148
Oxidation Resistance
15
μm/year
0
15
2.4
Corrosion Resistance
0.7
mm/year
0.87
0.7
1.6e5
Compressive Strength
300
MPa
133
300
7,343
Fracture Toughness
8
MPa m^{1/2}
0.52
8
0.97
Electrical Resistivity
1e4
Ω·m
11.4
1e4
1.4e6
Gallium Nitride surface magnification
Before Treatment
Under the microscope at high magnification, the contaminated Gallium Nitride surface reveals scattered dark spots and irregular clumps. These debris clusters cling tightly, creating uneven patches across the material. Dust and residues obscure the underlying structure, making the texture look rough and mottled.
After Treatment
After laser treatment, the same view shows a smooth, uniform Gallium Nitride surface free of debris. The material now gleams evenly, with no visible spots or clumps remaining. Its clean texture appears polished and consistent throughout.
Regulatory Standards & Compliance
ANSI
ANSI Z136.1 - Safe Use of Lasers
Gallium Nitride Laser Cleaning Laser Cleaning FAQs
Q: How do I prepare Gallium Nitride for safe laser cleaning?
A: When laser cleaning Gallium Nitride, we typically start by ensuring the surface is free from loose debris to avoid uneven heating. We've found that a gentle pre-wipe with a soft cloth helps, especially compared to more brittle semiconductors that might crack under initial stress. This step sets up the material's tough, heat-resistant nature for effective contaminant removal without risking subsurface damage.
Q: What causes uneven cleaning on Gallium Nitride during laser sessions?
A: Uneven cleaning often happens if the laser power isn't adjusted for Gallium Nitride's reflective surface, which bounces more energy than on absorbent materials like silicon. We recommend scanning in multiple passes at lower intensity to distribute heat evenly across its dense structure. In our experience, this prevents hot spots that could alter the material's strong mechanical properties.
Q: Can laser cleaning change Gallium Nitride's semiconductor performance?
A: Laser cleaning Gallium Nitride preserves its electrical conductivity when
Related Semiconductor › Compound Materials
Gallium Nitride Laser Cleaning Dataset Download
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