Dielectric properties and molecular structure of amide solutions. 1. N-Methylacetamide in carbon tetrachloride

1983 ◽  
Vol 87 (8) ◽  
pp. 1385-1390 ◽  
Author(s):  
Krzysztof Pralat ◽  
Jan Jadzyn ◽  
Stefania Balanicka
Keyword(s):  
Molecular Structure ◽  
Dielectric Properties ◽  
Carbon Tetrachloride

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.

scholarly journals Dipole moments and molecular structure. Part II.—The trichlorides of the elements of group V

1932 ◽  
Vol 136 (829) ◽  
pp. 256-263 ◽  
Keyword(s):  
Molecular Structure ◽  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Inorganic Compounds ◽  
Antimony Trichloride ◽  
Molecular Structures ◽  
Polar Solvents ◽  
Group V ◽  
Gaseous State ◽  
Analogous Data

Although numerous investigators have carried out measurements of the dipole moments of the commoner organic compounds, few references are to be found to analogous data for inorganic compounds. The latter are confined almost exclusively to those substances which can be investigated in the gaseous state. The present series of investigations were commenced, therefore, with a view to applying the method of dilute solutions to the measurement of the dipole moments of such inorganic compounds as are soluble in non-polar solvents, and to relating the dipole moments of analogous groups of compounds to their molecular structures. The first series of measurements to be made, and those described in this paper, were upon the trichlorides of phosphorus, arsenic and antimony. Of these, measurements had been recorded only with respect to antimony trichloride when this investigation was carried out. More recently, measurements of the dipolar moments of all three compounds have been recorded by Bergmann and Engel. but their experimental results show much greater discrepancies among one another than do those of the author. Werner used both benzene and ethyl ether as solvents for the antimony trichloride, finding a considerable difference between the values obtained in the two cases. Bergmann and Engel used carbon tetrachloride as solvent for the phosphorus and arsenic trichlorides and benzene for the antimony trichloride. In the present investigation, benzene has been used as the solvent for all three compounds.

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