Solidur®
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Technical Details of 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.

Extremely tough, extremely reliable

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.

Find out more about glass-to-metal sealing technology.

 

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

Customized color temperature cool Customized color temperature neutral Customized color temperature warm

Customized white light and color temperature

Specifications

Solidur® Mini LEDs Technical Specification
Color temperature CCT 4000 - 6000 K
Color rendering index Ra > 90
Forward current IF max Up to 350 mA
Luminous flux φv  Up to 16 Im at 100 mA / 42 Im at 350 mA
Viewing angle (FWHM) θv From 58° to 110°
Other colors/wavelengths Available
Size Ø As small as 2.0 mm
Height h As small as 1.4 mm
Autoclavability Successfully tested to withstand 3500 test cycles at an ambient pressure of 2 bar and a temperature of 134 °C
Electrical interfaces
  • Surface Mount Design (SMD)
  • Pigtail
  • Connectorized/Through-hole
 
 
Luminous Flux at Different Forward Currents

Luminous Flux at Different Forward Currents

 
Viewing Angles

Viewing Angles

Specifications

Solidur® Ring LEDs Standard length
Color temperature CCT
 4000 - 6000 K
Color rendering index Ra
 > 90
Forward current IF max.
 Up to 350 mA
Luminous flux φv 
 Up to 150 Im at 350 mA
Viewing angle (FWHM) θv
 Customized, typically 60° - 130°
Other colors/wavelengths
 Upon request
Size Ø
 Down to 8.4 mm
Height h Smaller than 2 mm
Autoclavability
 Successfully tested to withstand 3500 test cycles at an ambient pressure of 2 bar and a temperature of 134 °C
Electrical interfaces
  • Surface Mount Design (SMD)
  • Connectorized/Through-hole
 

Specifications 02

Specifications

Solidur® Transistor Outline LEDs Technical Specifications
Color temperature 3000 - 6000 K
Color rendering index Ra
 > 90
Forward current IF typ
 Up to 700 mA
Luminous flux φv
 Typically 10 - 300 Im at 20 - 700 mA, depending on the design
Viewing angle (FWHM) θv
 Customized, typically 20 - 130 °C 
Other colors/wavelengths
 Available as white light LED or colored LED
Size Ø 3.3 to 10 mm
Height h > 2 mm
Autoclavability Successfully tested to withstand 3500 test cycles at an ambient pressure of 2 bar and a temperature of 134 °C
Electrical interfaces
  • Connectorized/Through-hole
  • Surface Mount Design (SMD)
Lenses / Caps
  • Specially adapted UV transparent glasses available as windows or lenses 
  • High transmission at low wavelength
  • Refractive index 1.5 < n < 1.84
Options
  • ESD protection and resistors available
  • Layout for multi chips possible

 

Specifications 02

Specifications 03

SMD LEDs

Solidur® SMD LEDs Technical Specifications
Spectral range UVB/C
Wavelength l 265 nm, 280 nm, 310 nm
Forward current IF max.  Typically max. 700 mA
Radiation flux φv Customized
Other colors/ wavelengths Available
Size Down to 3.5 x 3.5 mm2 or a diameter down to 2 mm
Height h  < 1.5 mm
Hermeticity yes
Autoclavability yes
Electrical interfaces
  • Copper, Kovar or Steel header with SMD or through-hole design
  • Ceramic base with SMD design
Options
  • Single or multi-chip configurations
  • Customized chips: white, UV, VIS and IR
  • Large variety of lens shapes: High quality primary optics for UV, VIS and IR applications; Specially adapted UV transparent glasses
  • Customized materials, shapes, electrical interfaces and surface coatings
 

 

Features of Solidur® SMD UV LEDs Your Benefits
Metal-Glass or Ceramic-Glass package components Virtually no degradation caused by UVB/C radiation
Matching thermal expansion of components
  • Reduced mechanical stress
  • High temperature range applicable
Encapsulation material Increase of efficiency up to 50 % depending on design 
Flat window and lens caps Beam shaping according to your application
Wafer level production possible Cost effective production
Through-hole and SMD package concept High flexibility in assembly and electrical connection 

Want to know more? Let’s talk

Whether you need more information, samples, a quote, or advice for a project, I would be delighted to talk to you.

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Qiwei Song - Sales Engineer
Qiwei Song

Sales Engineer