UV Adhesives for Optical Communication and Camera Modules

2026/03/31 0

I. Core Performance Parameter Comparison (Presented in Table)

Performance Dimension	UV Adhesive for Optical Communication	UV Adhesive for Camera Modules
Core Requirements	Low optical loss, precision bonding, long-term stability	High light transmittance, low stress, no imaging interference
Light Transmittance	≥98.5% (400–850 nm band), some up to 98.8%	≥99% (400–700 nm visible range), automotive grade up to 99.5%
Refractive Index	1.45–1.55, must match optical fiber / fused silica	1.49–1.52, suitable for glass / plastic lenses (tolerance ≤±0.01)
Curing Shrinkage	≤0.3%, some as low as 0.27% (prevents device deformation)	≤0.5% (automotive grade ≤0.3%), controls optical axis shift < 0.01°
Shear Strength	≥18.0 MPa, high-end models up to 19.0 MPa	≥20 MPa, retention rate ≥85% at low temperature (-40℃)
Temperature Resistance	-40℃ ~ 85℃ (no cracking after 1000 thermal cycles)	Consumer grade: -40℃ ~ 120℃; Automotive grade: -60℃ ~ 150℃
Special Requirements	Coupling loss ≤0.25 dB, non-yellowing, humidity & heat resistance	Yellowing index ΔE ≤1, vibration resistance (10–2000 Hz), IP68 protection
Curing Method	UV single curing (5–20 sec) or thermal + UV dual curing (for heat-sensitive devices)	UV single curing (initial cure 5–10 sec), some require post thermal curing for reinforcement

II. Application Scenarios & Core Adaptation Solutions

1. UV Adhesive for Optical Communication: “Low-Loss Bonding” Focused on Signal Transmission

Typical Applications: Bonding of PLC chips to fiber arrays, optical module housing encapsulation, optical fiber coupler / patchcord fixing, optical detector component bonding.

Industry Background: With the popularization of 800G/1.6T optical modules, AI computing demand has driven a 68.5% year-on-year market growth, sharply increasing demand for low-shrinkage, yellowing-resistant formulations.

Pain Point Solution: Addressing “insufficient transmittance causing coupling loss” faced by 82% of enterprises; bubble-free formula + precision dispensing keeps loss below 0.2 dB.

Main Products:

Ketexin Customized Grade: For 800G/1.6T optical modules, defect rate reduced from 8.9% to 0.6%;
Loctite 3220: Thermal + UV dual cure, designed for heat-sensitive devices, shear strength 2960 psi;
Shenzhen Lianchuang Adhesive: Temperature resistance -60℃ ~ 200℃, for precision bonding inside optical modules.

2. UV Adhesive for Camera Modules: “Optical-Grade Bonding” Ensuring Imaging Accuracy

Typical Applications: Lens fixing, CMOS sensor packaging, IR filter bonding, module housing sealing, especially for mobile / automotive ADAS cameras.

Scenario Segmentation:

Consumer electronic cameras: Emphasize fast curing (automated line, cycle ≤10 sec/module), repairability;
Automotive cameras: Withstand extreme environments (salt spray, gravel impact), support L4 autonomous driving high-resolution imaging.

Main Products:

Gemtek Silicone-Modified UV Adhesive: Automotive grade, -60℃ ~ 150℃, elongation at break ≥50% (vibration resistant);
3M DP8010: Contains fluorescent indicator for easy adhesive continuity inspection, suitable for filter bonding;
ABLELUX HGA-3E: For mobile camera lens fixing, low viscosity (500–5000 cps) for easy coating.

III. Key Selection Logic

Compliance First: Obtain CNAS/CMA dual certification reports, verify light transmittance, shrinkage, VOC content (≤6 g/L), and RoHS/REACH compliance to avoid supply chain issues.
Scenario Matching:

Optical communication: Choose low-loss + fast curing (e.g., Ketexin) for optical modules; high transmittance + low shrinkage (e.g., Taikang New Materials) for PLC chips.
Camera modules: Consumer grade — high transmittance + repairable; Automotive grade — wide temperature range + vibration resistant (e.g., Gemtek).

Process Compatibility: Optical communication requires precision dispensing (dispensing tolerance ≤±3%); camera modules need strict adhesive overflow control (residue ≤0.001 mm³) to avoid blocking optical paths.