White paper
Glass-To-Housing Bonding in LiDAR Sensors
A validated approach combining BOROFLOAT 33 cover glass and DELO adhesives for closed-cavity packaging
As LiDAR adoption accelerates across automotive, robotics, and industrial applications, closed-cavity sensor designs place increasing demands on cover window bonding. The glass-to-housing bond must maintain optical clarity and environmental sealing under harsh mechanical and environmental conditions — while glass edges and corners remain the most critical points in the assembly.
SCHOTT and DELO have jointly developed and validated a material combination of BOROFLOAT 33 cover glass and DELO PHOTOBOND LA adhesives that addresses these challenges. Tested against automotive-grade requirements, the combination provides reliable environmental sealing and structural reinforcement at the glass perimeter — directly addressing the most stress-critical areas of the assembly.
What can you expect in this white paper?
Validated material combination: Test results demonstrating full bond integrity and sealing performance across all automotive-grade test stages
Edge protection in focus: How adhesive bonding along the glass perimeter reinforces the most stress-critical areas of the cover window
Ball drop performance: 26-sample test series — more than 95% of samples survived an impact energy of 1 J, with 95% failure probability only reached at approximately 5 J
Automotive environmental validation: Results from the Waterfall Test protocol including thermal shock, salt water exposure, temperature humidity storage, ice water shock, and IP6K7 sealing
Material properties: Optical transmission, thermal resistance, and CTE compatibility data for the glass-adhesive-housing system
Why this material combination?
Jointly validated: SCHOTT and DELO have tested the full glass-adhesive-housing system against real-world automotive requirements — covering mechanical impact, environmental sealing, and long-term bond stability
Optical precision: BOROFLOAT 33 exceeds 90% NIR transmission at 905 nm and 1550 nm, even without anti-reflective coatings
CTE compensation: Flexible DELO adhesives absorb differential thermal expansion between glass and aluminum across the full operating range of –40 °C to +125 °C
Structural reinforcement: The adhesive bond distributes mechanical load and reduces stress concentrations at the glass edge
Your advantages at a glance
Proven reliability: Full pass across all Waterfall Test stages including IP6K7 sealing
Mechanical robustness: High impact resistance validated across 26 samples — over 95% survived 1 J impact energy
Optical performance: High NIR transmission maintained throughout all test conditions
Design flexibility: Validated for glass-to-metal assemblies in closed-cavity LiDAR packaging
Broad applicability: One validated solution for long-range and short-range LiDAR across automotive, robotics, and industrial 3D sensing
Let us inspire you!
Discover how SCHOTT and DELO’s jointly validated material combination solves the core challenge of LiDAR cover window bonding — delivering optical precision, environmental sealing, and proven mechanical robustness ready for the demands of series production.
Download the white paper now and learn more!
About DELO
DELO is a leading provider of high-tech adhesives and has been offering solutions for the semiconductor, automotive, and electronics industries for over 25 years. Our innovative technologies set industry standards. Companies such as Bosch, Huawei, and Siemens trust DELO when it comes to superior adhesive technologies.
Industry Leaders Trust DELO
