FDA
FDA 21 CFR 1040.10 - Laser Product Performance Standards
Todd DunningMAUnited States
Optical Materials for Laser SystemsPublished
Dec 16, 2025
Gorilla Glass Laser Cleaning
When laser cleaning Gorilla Glass, start by setting the power low to avoid any risk of micro-cracks from its high thermal sensitivity, then gradually increase as its inherent toughness removes contaminants without compromising the surface integrity I've seen hold up in repeated electronics repairs.
Laser-Material Interaction
Absorptivity
0.1
0.05
0.1
0.15
Absorption Coefficient
2,000
m⁻¹
1,000
2,000
5,000
Laser Damage Threshold
5
J/cm²
1
5
10
Thermal Shock Resistance
1
MW/m
0.5
1
1.5
Reflectivity
0.08
0.05
0.08
0.1
Thermal Destruction Point
1,073
K
1,000
1,073
1,200
Vapor Pressure
0.01
Pa
0.001
0.01
1
Thermal Destruction
1,743
K
638
1,743
2,426
Specific Heat
840
J/(kg·K)
120
840
900
Laser Reflectivity
0.04
0.03
0.04
3.8
Thermal Conductivity
1.1
W/m·K
0.77
1.1
36.7
Thermal Expansion
9e-6
K^{-1}
1e-6
9e-6
9.7
Laser Absorption
10.5
m^{-1}
0.01
10.5
7.4e4
Thermal Diffusivity
5.8e-7
m²/s
0
5.8e-7
1e-5
Ablation Threshold
3.2
J/cm²
0.64
3.2
13.1
Gorilla Glass Laser Cleaning Material Characteristics
Electrical Resistivity
1e12
ohm m
9.5e9
1e12
1e16
Fracture Toughness
0.75
MPa√m
0.56
0.75
2.6
Youngs Modulus
70
GPa
60.8
70
6.1e10
Oxidation Resistance
0.98
0
0.98
2,177
Density
2.4
g/cm³
2.1
2.4
2,625
Hardness
6.2
GPa
4
6.2
2,310
Corrosion Resistance
5e-8
mol/m²/s
4.8e-5
5e-8
1.6
Compressive Strength
700
MPa
620
700
2,170
Flexural Strength
700
MPa
10
700
780
Tensile Strength
900
MPa
7
900
733
Laser Damage Threshold
11.3
J/cm²
2.4
11.3
15.6
Thermal Destruction
1,743
K
638
1,743
2,426
Specific Heat
840
J/(kg·K)
120
840
900
Laser Reflectivity
0.04
0.03
0.04
3.8
Thermal Conductivity
1.1
W/m·K
0.77
1.1
36.7
Thermal Expansion
9e-6
K^{-1}
1e-6
9e-6
9.7
Laser Absorption
10.5
m^{-1}
0.01
10.5
7.4e4
Thermal Diffusivity
5.8e-7
m²/s
0
5.8e-7
1e-5
Ablation Threshold
3.2
J/cm²
0.64
3.2
13.1
Gorilla Glass surface magnification
Before Treatment
The contaminated surface reveals scattered patches of grime and dust that cling unevenly. Oily residues form irregular blobs, obscuring the glass's natural texture beneath. Fine debris particles dot the area, creating a mottled and rough overall look.
After Treatment
Laser treatment exposes a smooth expanse free of grime and clinging residues. The glass surface now gleams with uniform clarity, revealing its inherent polish. Subtle textures emerge cleanly, without any mottled spots or rough interruptions.
Regulatory Standards & Compliance
ANSI
ANSI Z136.1 - Safe Use of Lasers
IEC
IEC 60825 - Safety of Laser Products
OSHA
OSHA 29 CFR 1926.95 - Personal Protective Equipment
Gorilla Glass Laser Cleaning Laser Cleaning FAQs
Q: Can you use a laser to clean Gorilla Glass without damaging the oleophobic coating?
A: Low fluence preserves coating. Yes, laser cleaning of Gorilla Glass is feasible while pretty much preserving its oleophobic coating. The key is basically using a carefully controlled 1064 nm wavelength with fluence below ~2.5 J/cm². This approach selectively removes contaminants without the thermal accumulation that degrades the delicate surface treatment.
Q: What is the best laser wavelength (e.g., 1064nm, 532nm) for cleaning contaminants from Gorilla Glass without causing micro-fractures?
A: 1064nm minimizes thermal stress. For Gorilla Glass, a 1064nm wavelength is typically optimal. It provides pretty sufficient absorption by most contaminants while transmitting through the glass matrix, minimizing heat buildup in the chemically strengthened layer. Maintain fluence below 2.5 J/cm² with a 50µm spot size to ablate residues without inducing micro-fractures from thermal stress.
Q: How does the ion-exchange process and resulting compressive stress layer in Gorilla Glass affect its susceptibility to laser-induced damage?
A: Exceeds threshold releasing compressive energy. The ion-exchange process builds a pretty deep compressive layer, but pushing past the 2.5 J/cm² fluence threshold can locally overcome this stress. That typically sparks pinpoint failures, as the stored compressive energy gets basically unleashed in a catastrophic burst, undermining the glass's structural integrity.
Q: What are the safe operating parameters (fluence, pulse width, repetition rate) for laser cleaning Gorilla Glass on consumer electronics like smartphones?
A: For Gorilla Glass, kick off with a 1064 nm wavelength and a pretty conservative fluence below 2.5 J/cm². Typically, go for a 10 ns pulse width and 100 kHz repetition rate, but validate those settings on scrap parts first to avoid surface damage.
Q: After laser cleaning, is there a change in the surface roughness or optical clarity of Gorilla Glass that could affect touch sensitivity or display quality?
A: Maintains optical clarity below threshold. When cleaned properly below the 2.5 J/cm² threshold, Gorilla Glass typically retains its optical clarity. We confirm this by assessing surface topology and haze, ensuring laser-induced micromelting causes no change to touch sensitivity.
Q: Can laser cleaning be used to selectively remove hard coatings (like anti-glare or anti-fingerprint) from Gorilla Glass without damaging the substrate?
A: fluence below 2.5 J/cm². Yes, basically, with precise 1064 nm laser parameters, you can ablate these coatings. The key is maintaining fluence below 2.5 J/cm² to typically remove the polymer layers without affecting the ion-exchanged glass substrate.
Q: What specific safety hazards are associated with laser cleaning Gorilla Glass, such as toxic fumes from ablated coatings or glass particulates?
A: Generates silica nanoparticles and fumes. Laser cleaning of Gorilla Glass at 1064 nm typically generates hazardous silica nanoparticles and toxic metal fumes from coatings. Proper fume extraction is mandatory, and I'd basically recommend a fully enclosed Class 1 laser system with appropriate respiratory PPE to mitigate these inhalation risks.
Q: How do you verify the effectiveness of laser cleaning on Gorilla Glass? What non-destructive testing methods are suitable?
A: We typically verify cleaning effectiveness with high-magnification microscopy to inspect for micro-fractures and spectrophotometry to ensure optical performance. But visual inspection alone is basically insufficient, since it overlooks subsurface damage from fluence exceeding 2.5 J/cm².
Q: Is laser cleaning a viable method for removing scratches from Gorilla Glass, or does it primarily target surface contaminants?
A: Ablation enlarges defects. Laser cleaning basically relies on ablation at around 2.5 J/cm², making it fairly ideal for stripping away surface contaminants. But with a scratch, the process would just etch the whole surface, worsening the defect instead of mending it. This method essentially removes material and can't fill or polish out those flaws.
Q: For laser cleaning systems, what type of beam delivery (galvo scanner, fixed optic) and spot size are recommended for treating the curved edges of Gorilla Glass?
A: Galvo scanner dynamic focus. For Gorilla Glass edges, a galvo scanner with dynamic focus is typically essential. This setup basically maintains the required 2.5 J/cm² fluence across complex 2.5D contours by adjusting the focal plane continuously. A 50 µm spot size delivers the precision to clean curved surfaces effectively, without inducing thermal stress.
