Dielectric properties and molecular structure of water-acetone solutions

1965 ◽  
Vol 6 (1) ◽  
pp. 15-19 ◽  
Author(s):  
M. I. Shakhparonov ◽  
Ya. Yu. Akhadov
Keyword(s):  
Molecular Structure ◽  
Dielectric Properties ◽  
Structure Of Water

Photosensitive Polyimide having low loss tangent for RF application

2018 ◽  
Vol 2018 (1) ◽  
pp. 000476-000482 ◽  
Author(s):  
Masao Tomikawa ◽  
Hitoshi Araki ◽  
Yohei Kiuchi ◽  
Akira Shimada
Keyword(s):  
Molecular Structure ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
High Frequency ◽  
Low Dielectric Constant ◽  
Low Loss ◽  
Elongation At Break ◽  
Low Dielectric ◽  
The Poor

Abstract Progress of 5G telecommunication and mm radar for autopilot, high frequency operation is required. Insulator materials having low loss at high frequency is desired for the applications. We designed the low dielectric constant, and low dielectric loss materials examined molecular structure of the polyimide and found that permittivity 2.6 at 20GHz, dielectric loss 0.002. Furthermore, in consideration of mechanical properties such as the toughness and adhesion to copper from a point of practical use. Dielectric properties largely turned worse when giving photosensitivity. To overcome the poor dielectric properties, we designed the photosensitive system. After all, we successfully obtained 3.5 of dielectric constant and 0.004 of dielectric loss, and 100% of elongation at break. In addition, we offered a B stage sheet as well as varnish. These materials are applicable to re-distribution layer of FO-WLP, Interposer and other RF applications for microelectronics.

Study of Molecular Structure of Water-Soluble Phenolic Resin with Different Molecular Weight by Infrared Spectrum

2014 ◽  
Vol 900 ◽  
pp. 15-19 ◽  
Author(s):  
Xing Lei ◽  
Gui Long Xu ◽  
Jin Yang ◽  
Jian Hu
Keyword(s):  
Molecular Structure ◽  
Molecular Weight ◽  
Infrared Spectrum ◽  
Sodium Hydroxide ◽  
Phenolic Resin ◽  
Addition Reaction ◽  
Early Stage ◽  
Water Soluble ◽  
Structure Of Water ◽  
Different Molecular Weight

Water-soluble phenolic resin was prepared using sodium hydroxide and ammonia as catalysts. The molecular structure of water-soluble phenolic with different molecular weight was studied by infrared spectrum and the mechanism was discussed. The results show that addition reaction and polycondensation synchronize in the reaction process, while addition reaction dominates in the early stage while polycondensation dominates in the later stage.

Dielectric Constants and Molecular Structure of Nematic Liquid CrystalsII. Variation of the Bridging Group

1975 ◽  
Vol 30 (1) ◽  
pp. 79-82 ◽  
Author(s):  
W. H. de Jeu ◽  
Th. W. Lathouwers
Keyword(s):  
Molecular Structure ◽  
Dielectric Properties ◽  
Dielectric Constants ◽  
Bridging Groups

Abstract Measurements are presented of the dielectric constants of some nematic compounds with the structure The following bridging groups X are considered: C ≡ C, CH = CH, CCl = CH, N = N, CH = N, N = CH, CO - O and O -CO. Starting from the compounds with non-polar bridging groups the influence of the group X on the dielectric properties is systematically evaluated.

Biaxial dielectric properties in the chiral smectic C phase of single compounds and their relation to molecular structure

1995 ◽  
Vol 166 (1) ◽  
pp. 195-204 ◽  
Author(s):  
M. Buivydas ◽  
F. Gouda ◽  
S. T. Lagerwall ◽  
M. Matuszczyk ◽  
B. Stebler ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Dielectric Properties ◽  
Smectic C
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