Build-up electrical insulation material with low-dielectric loss tangent, low-CTE and low-surface roughness

2011 ◽  
Author(s):  
Eita Horiki ◽  
Isao Suzuki ◽  
Toshiaki Tanaka ◽  
Akihiro Uenishi ◽  
Kazuyoshi Shiomi
Keyword(s):  
Surface Roughness ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
Electrical Insulation ◽  
Insulation Material ◽  
Low Dielectric

Build-up Electrical Insulation Material with Low-Dielectric Loss Tangent, Low-CTE and Low-Surface Roughness

2011 ◽  
Vol 2011 (1) ◽  
pp. 000813-000819
Author(s):  
Eita HORIKI ◽  
Isao SUZUKI ◽  
Toshiaki TANAKA ◽  
Akihiro UENISHI ◽  
Hiroshi KOUYANAGI
Keyword(s):  
Surface Roughness ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
High Frequency ◽  
Transmission Loss ◽  
Coefficient Of Thermal Expansion ◽  
Electrical Insulation ◽  
Insulation Material ◽  
Low Dielectric

With the increasing speed of information and communication equipments in recent years, together with the high-speed signal processing of LSIs, there is a requirement for build-up electrical insulation materials (used in IC package substrates) to have low-dielectric loss tangent which reduces dielectric loss so as to achieve low transmission loss in the high-frequency GHz bands. At the same time, there is an increasing need for materials to have low-CTEs (Coefficient of Thermal Expansion) so as to ensure highly reliable substrates. With ou formulation technology, we have developed a next-generation film-shaped build-up electrical insulation material compatible with high-frequency signal transmission by using a composition of practical thermosetting epoxy resin, which has realized both a low-dielectric loss tangent and at the same time, a low-CTE. In addition, this material can show a low-surface roughness after the film desmear process. It is thus expected to help reduce not only dielectric loss by means of a low-dielectric loss tangent, but also conductor loss caused by the skin effect, and will promote fine line formation by means of SAP (Semi Additive Process).

Build-up electrical insulation material with low-dielectric tangent, low-CTE and low-surface roughness

2010 ◽  
Author(s):  
Isao Suzuki ◽  
Toshiaki Tanaka ◽  
Akihiro Uenishi ◽  
Takayuki Kobayashi ◽  
Junnosuke Murakami
Keyword(s):  
Surface Roughness ◽  
Electrical Insulation ◽  
Insulation Material ◽  
Low Dielectric

REVISIT TO DIELECTRIC PROPERTIES OF FERRITE CERAMICS

2012 ◽  
Vol 02 (03) ◽  
pp. 1230010 ◽  
Author(s):  
L. B. KONG ◽  
L. LIU ◽  
J. W. ZHAI ◽  
Z. W. LI ◽  
Z. H. YANG
Keyword(s):  
Dielectric Properties ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
Sintering Temperature ◽  
Short Review ◽  
Sintering Aids ◽  
Time Duration ◽  
Sintering Aid ◽  
Low Dielectric

Dielectric properties of ferrite ceramics have been less reported than their magnetic properties. Our recent study indicated that ferrite ceramics with very low dielectric loss tangent can be developed by using appropriate sintering aids, together with the optimization of other sintering parameters such as sintering temperature and time duration. Among various candidates of sintering aids, Bi 2 O 3 is the most promising one. It is important to find that the optimized concentration of sintering aid for full densification is not sufficient to achieve lowest dielectric loss tangent. This short review was aimed to summarize the understanding in microstructural evolution, grain growth, densification and dielectric properties of ferrite ceramics as a function of sintering aid concentration and sintering parameters, which could be used as a guidance to develop ferrite ceramics with low dielectric loss tangents for various applications.

Elastomeric high-κ composites of low dielectric loss tangent: Experiment and simulation

2020 ◽  
Vol 201 ◽  
pp. 108337
Author(s):  
Youngpyo Ko ◽  
Hyungsuk Yoon ◽  
Seulki Kwon ◽  
Hyunjung Lee ◽  
Min Park ◽  
...  
Keyword(s):  
Dielectric Loss ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
Low Dielectric ◽  
Experiment And Simulation

Diamond composites of high thermal conductivity and low dielectric loss tangent

2021 ◽  
Vol 269 ◽  
pp. 115171
Author(s):  
A.S. Osipov ◽  
P. Klimczyk ◽  
P. Rutkowski ◽  
Y.A. Melniychuk ◽  
L.O. Romanko ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
High Thermal Conductivity ◽  
Low Dielectric

Electrophysical properties of mixtures of mineral oil and synthetic ester dielectric liquid

2021 ◽  
Vol 14 (2) ◽  
pp. 132-141
Author(s):  
M. N. Lyutikova ◽  
S. M. Korobeynikov ◽  
A. A. Konovalov
Keyword(s):  
Dielectric Loss ◽  
Breakdown Voltage ◽  
Loss Tangent ◽  
Dielectric Loss Tangent ◽  
Kinematic Viscosity ◽  
Mineral Oil ◽  
Flash Point ◽  
Power Transformers ◽  
Synthetic Ester ◽  
Insulating Properties

Power transformers are key equipment in power generation, transmission, and distribution systems. The reliability of power transformers is based on the performance of the insulation system, which includes solid cellulose insulation and a liquid dielectric. Modern power engineering requires liquid insulation to have excellent insulating properties, high fire resistance, and biodegradability. Mineral oil that has been in use for over 100 years does not meet certain requirements. Therefore, various methods of enhancing the insulating properties of the oil are currently being considered, including mixing it with other liquid dielectrics, which have excellent properties. Synthetic and natural esters are considered as alternative fluids.This article discusses the possibility of enhancing the insulating characteristics of mineral oil with a high content of aromatic hydrocarbons (for example, T-750 oil) by mixing it with synthetic ester Midel 7131. Assessment is given of insulating parameters of the resulting mixtures with an ester fraction in mineral oil from 0% to fifty%. The main characteristics of the mixtures are described, such as density, kinematic viscosity, flash point, dielectric loss tangent, relative dielectric permittivity, breakdown voltage, and moisture content. It is shown that with an increase in the proportion of ester, some parameters of the obtained insulating liquid improve (flash point, dielectric constant, breakdown voltage), while values of other parameters (density, kinematic viscosity, dielectric loss tangent) with an ester content of more than 10% in the mixture do not meet the requirements for mineral oils.

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