High-purity fused spherical silica "EXCELICA™"

EXCELICA™ is high-purity fused synthetic spherical silica produced by vapor phase reaction. The particle diameter ranges from a few to several tens of microns. Coarse grain cut grades are also available to suit various applications.

Product overview

Generic names High-purity fused spherical silica
Product name EXCELICA™
Chemical formula SiO2
Packing /
shipping method
Flexible containers, paper bags
General applications
  • Encapsulants for semiconductors
  • Hole-plugging materials for substrates
  • Die bonding materials
  • Precision adhesive
  • Quartz materials
  • Films
    etc.

Special characteristics

  • High purity: EXCELICA™ is produced in a closed system using highly purified materials, resulting in silica with a trace of impurities such as radioelements, heavy metal elements, or ionic elements. Especially the amount of uranium or thorium contained, which emits alpha rays causing semiconductor memory malfunctions, in EXCELICA™ is less than 0.1ppb.
  • Amorphous: The X-ray diffraction pattern shows that EXCELICA™ is amorphous.