Solidur®

SCHOTT Solidur® LEDs are made with high-quality, vacuum-tight housings that deliver complete protection for their internal LED chips, supporting long-term functionality for 'fit-and-forget' applications in harsh environments and safety-critical settings.

Robust, efficient, and durable

Rigid gas-tight housings give Solidur® LEDs a sturdy defense against water, moisture, humidity, chemicals, vibrations, shock, mechanical impact, UV, pressure, and temperatures up to 300°C. They also offer the extra advantage of outstanding thermal conductivity and stability. This results in improved efficiency and extended service life.

Fully autoclavable

Solidur® LEDs can endure intensive autoclave sterilization, emerging with sealing intact and operating with maximum performance. Rigorous testing has shown that the modules will survive 3,500 test cycles at an ambient pressure of two bar and a temperature of 134°C.

Outstanding UV capabilities

SCHOTT’s UV product portfolio includes customizable UV-transmissive glass materials (discs, wafers, lenses), encapsulation materials to increase radiation flux, and complete-assembly Solidur® SMD UV LEDs.

Incredibly customizable

Solidur® materials, coatings, lenses, and chips can all be easily customized. In addition to light property options, customers benefit from a broad choice of material options, including kovar, steel or copper bases; coatings in gold, nickel or silver; single or multiple chip configurations; electrical interface selections, and miniaturization options.

Technology

Mini LED

Ring LED

Transistor Outline LED

SMD LED

The benefits of hermetic versus conventional LEDs

The challenge

Conventional LEDs are typically encapsulated using polymer sealing materials. They do little to protect the sensitive internal electronics. But the sealing points of LED lighting modules are of critical importance for the protection of the internal semiconductor components. Even after just one cycle in steam sterilization conditions, as required for medical and dental instruments, organic polymer materials can begin to break down. The weakened seal allows the potential for moisture permeation into the module, a fault that can lead to premature failure for the LED chip inside. This is why the use of standard LEDs is often impossible or extremely limited In applications with high humidity, heat, pressure, or aggressive chemicals, with additional protective housings that need to be designed around the light source.

The solution

Hermetically sealed LEDs represent an answer to the reliability challenge found, for example, in medical and dental applications. The vacuum-tight housings of SCHOTT Solidur® LEDs are made only of inorganic materials, such as metal, glass or ceramics – none of which age or break down over time. As such, the LED packaging offers long-term hermetic protection against moisture, temperature, mechanical impact and pressure and chemicals. The permanent connection of glass and metal therefore averts any danger of internal corrosion or contamination.

Reliability specifications of hermetic Solidur® LEDs

Autoclaving: Proven functionality for
- oils
- Steam sterilization (2 bar; 134ºC)
Temperature stability: > 260ºC
Gas-tightness / Hermeticity: 1 x 10-8 mbar x l/s
Electric insulation: up to 1 kΩ
Chemical resistance: High
Thermal shock stability: -65ºC to 150ºC for 15 cycles
Refractive index of glass: 1.48-1.58
Temperature conductivity: High, enabled by ceramic or copper material