• Submounts are ceramic LED package bases which minimize thermal resistance between LED junctions and adjacent components
  • By reducing junction temperatures, an LED will produce increased efficiency, brightness, color and reliability
  • Each device is custom tailored to the customer’s specifications
  • Submount materials include quartz, alumina, aluminum nitride, kovar and beryllium oxide.
  • Applications include: heat sinks, standoffs, height matching, bonding pads, and jumpers.
  • Custom sizes, patterns and shapes available to your design specifications in thicknesses from 3 to 100 mils and beyond.

Submount Material Properties Chart

  Quartz Alumina AIN Kovar BeO Si
Compex Material Code C-20 C-30/35 C-28 KVR C-25 C-22
Coefficient of Thermal Expansion (ppm/°C) 6 6.7 4.6 5.86 7.5 0.56
Thermal Conductivity (W/m-K) 1.6 26 170 17.3 270 1.38 (SiO2)

Ordering information - SBT Series - Submounts

SBT 28 20 x 20 x 6 G S 5
Cap Style Material Length x Width (mils) Thickness (mils) Metallization Cut to Size Thickness Tolerance
SBT = Edge-to-edge plated or bare
CSX = Custom patterned
See Submount Material Properties Chart above   3 to +100 mils G = Gold B = Bare Custom   (only utilized if
figure represents tenths of a mil)

Note: Standard dimensional tolerance is .001” for length, width, and thickness. Tighter Thickness tolerances down to .0002” are available. Example: Compex Series SBT, dielectric type C-28, .020” x .020” x .006”, gold, cut to size, .0005” thickness tolerance