A highly adhesive siloxane LED encapsulant optimized for high thermal stability and optical efficiency

2016 ◽  
Vol 4 (46) ◽  
pp. 10791-10796 ◽  
Author(s):  
Yong Ho Kim ◽  
Young-Woo Lim ◽  
Daewon Lee ◽  
Yun Hyeok Kim ◽  
Byeong-Soo Bae
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Radical Polymerization ◽  
Hybrid Material ◽  
Cost Effective ◽  
High Thermal Stability ◽  
Optical Efficiency ◽  
Siloxane Hybrid Material

Herein, a highly adhesive LED encapsulant (HAEncap) is proposed based on a phenyl siloxane hybrid material with a high thermal stability, refractive index, and transparency which uses cost-effective radical polymerization.

High thermally stable hybrid materials for optical interconnects

2011 ◽  
Vol 1359 ◽  
Author(s):  
Tetsuo Sato
Keyword(s):  
Thermal Stability ◽  
Hybrid Material ◽  
Optical Interconnects ◽  
High Refractive Index ◽  
Device Fabrication ◽  
High Thermal Stability ◽  
Circuit Board ◽  
Optical Interconnection ◽  
Soldering Process ◽  
Telecom Wavelength

ABSTRACTOptical materials in the optical circuit board are required to overcome soldering process. In detail, the material should not have absorption and shape changes after several tens of seconds heating at around 250 °C. For such application field, we have developed a novel organic-inorganic hybrid material having a high thermal stability and low absorption at telecom wavelength.The hybrid material was designed to solvent less resin, which is free radical curable with heating at 150 °C or UV exposure at room temperature, for the sake of device fabrication activity. We demonstrated the waveguides fabrication by photolithography, and obtained high uniformity cured materials. Transparency of the waveguide sample at telecom wavelength was 0.10 dB/cm at 850 nm, 0.12 dB/cm at 1060 nm, 0.29 dB/cm at 1310 nm, and 0.45 dB/cm at 1550 nm. These values are good low attenuation for the Near-IR optical communication in optical interconnects. Without any further treatment such as post bake, the cured materials showed a high thermal stability. The temperature of 5 % weight loss was over 400 °C, and the transparency hardly changed after 1 min heating at 300 °C.In addition, the cured material showed a high refractive index of n=1.60 at 633 nm and a low curing shrinkage about 4.7 %. From these properties, the developed organic-inorganic material is expected to be beneficial for the optical interconnection such as micro lenses and optical packages.

Low-loss Polymer Optical Waveguides with High Thermal Stability

2001 ◽  
Vol 708 ◽  
Author(s):  
Jae-Wook Kang ◽  
Jae-Pil Kim ◽  
Won-Young Lee ◽  
Joon-Sung Kim ◽  
Jae-Suk Lee ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Optical Waveguides ◽  
High Thermal Stability ◽  
Propagation Loss ◽  
Copolymer Composition ◽  
Infrared Communication ◽  
Arylene Ether ◽  
Fluorinated Polyimides ◽  
Channel Waveguides

ABSTRACTWe synthesized novel cross-linkable fluorinated copoly(arylene ether sulfide)s for optical waveguide applications, which have high thermal stability, high optical transparency in the infrared communication region, and much smaller birefringence than other thermally stable fluorinated polyimides. The refractive index of the material can be easily controlled from 1.515 to 1.587 by changing the copolymer composition in the materials. The birefringence of the cured polymers were 0.0031∼0.0039 at the wavelength of 1.55 μm. This is much lower than those of fluorinated polyimides for optical waveguides. The refractive index of fluorinated poly(arylene ether sulfide) (FPAESI) after being stored at 100 °C for 1000 hr remains almost constant demonstrating the thermal stability. The propagation loss of the channel waveguides fabricated using reactive ion etching was less than 0.4 dB/cm at the wavelength of 1.55 μm.

Silica Orthorhombic Mesostructured Films with Low Refractive Index and High Thermal Stability

2004 ◽  
Vol 108 (30) ◽  
pp. 10942-10948 ◽  
Author(s):  
Paolo Falcaro ◽  
David Grosso ◽  
Heinz Amenitsch ◽  
Plinio Innocenzi
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
High Thermal Stability ◽  
Low Refractive Index

Wide-bandgap bipolar material with high thermal stability

2019 ◽  
pp. 903
Author(s):  
Sheng-Chieh Lin ◽  
Yu-Chieh Cheng ◽  
Man-Kit Leung ◽  
Jiun-Haw Lee ◽  
Tien-Lung Chiu
Keyword(s):  
Thermal Stability ◽  
Wide Bandgap ◽  
High Thermal Stability

New Deep Blue Emitting Materials Based on Indenopyrazine Core with High Thermal Stability

2011 ◽  
Vol 11 (5) ◽  
pp. 4639-4643 ◽  
Author(s):  
Chang-Hun Seok ◽  
Young-Il Park ◽  
Soo-Kang Kim ◽  
Ji-Hoon Lee ◽  
Jongwook Park
Keyword(s):  
Thermal Stability ◽  
High Thermal Stability ◽  
Deep Blue

scholarly journals Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid

2019 ◽  
Vol 17 (1) ◽  
pp. 1080-1086
Author(s):  
Elżbieta Chmiel-Szukiewicz
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Boric Acid ◽  
Ethylene Carbonate ◽  
Pyrimidine Ring ◽  
Polyurethane Foams ◽  
High Thermal Stability ◽  
H Nmr ◽  
Maldi Tof ◽  
Instrumental Methods

AbstractSyntheses of oligoetherols with a 1,3-pyrimidine ring and boron atoms using 6-aminouracil, ethylene carbonate and boric acid has been proposed. The structure of the obtained products were determined by instrumental methods (IR, 1H-NMR and MALDI-ToF spectra). The physicochemical and thermal properties of oligoetherols were examined. The products were characterized by high thermal stability. Based on the tests performed, it was found that oligoetherols obtained from 6-aminouracil, boric acid and ethylene carbonate are suitable for the manufacturing of polyurethane foams with improved thermal stability and reduced flammability.

Sign in / Sign up

Export Citation Format

Share Document