Precision Refractive Index Material Technology for Ultra-High Frequency Band Applications
■ Technology Overview
Precision refractive index materials are used in optically clear substrates, adhesives, lenses or waveguides, which can control the refractive index, birefringence, dn/dT at specific wavelengths and reduce the transmission loss of millimeter wave, THz wave or light wave. It is important to design the structure of organic molecules and obtain resins/films/adhesives with a refractive index accuracy of 0.001 requires the combination of technologies such as precision material formula design, film making and measurement.
■ Development
Adjustable refractive index material technology
• Specification: refractive index accuracy 0.001, dn/dT analysis (room temperature -120°C), Wave transmission loss analysis (dB)
Terahertz band application
• Specification: 0.3- 1THz absorption coefficient measurement, refractive index calculation, UV-curable material design
Design of optical waveguide coupling structure
• Specification: Design and simulation using BeamPROP
• Patent no.: 1. US9052446
2. US10962713B2
mmWave Laminate Material and Evaluation Platform
■ Technology Overview
• mmWave Laminate Material: Design and synthesis of low loss resin. Development of copper clad laminate
formulation and process
• Evaluation Platform: Assist international and domestic company to evaluate raw materials, including
processability, property, and application feasibility in copper clad laminate (CCL) or resin coated copper
(RCC) system
• Raw material could be resin, crosslinker, initiator, flame retardant, fiberglass cloth, filler, copper foil…etc.
▣ Development of Low Loss Resin and Copper Clad Laminate Material
• Low Loss Resin & Laminate
‐ Dk/Df ≦ 3.0/0.0015@10GHz
‐ Peeling Strength ≧ 3.5 Ib/in
‐ Tg ≧ 200℃
‐ UL 94V0
▣ ITRI Evaluation Platform
• Resin coated copper(RCC) and Copper clad laminate (CCL)
■ Raw Materials
• Resin/Crosslinker
• Br/P Flame retardant
• Initiator/Dispersing agent
• Silica/ Thermal conductive filler
• Fiberglass cloth/Copper foil
■ Evaluation/Test System
• High frequency laminate material
• Chemical and Physical property
• Dielectric Property
Industrial Technology Research Institute (ITRI)
Dept. of Hi-Frequency and Wide-Band Substrate Materials (V400)