Development of low loss organic-micromachined interconnects on silicon at microwave frequencies

2002 ◽  
Author(s):  
D. Newlin ◽  
A. Pham ◽  
J. Harriss ◽  
J.B. Lee
Keyword(s):  
Low Loss ◽  
Microwave Frequencies

Dielectric Properties of a New Ceramic System (1-x)(Mg0.95Zn0.05)2TiO4-x(Ca0.8Sr0.2)TiO3 at Microwave Frequencies

2020 ◽  
Vol 830 ◽  
pp. 37-42
Author(s):  
Shih Sheng Liu ◽  
Shiuan Ho Chang ◽  
Yuan Bin Chen
Keyword(s):  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Second Phase ◽  
X Ray Diffraction ◽  
Low Loss ◽  
Microwave Frequencies ◽  
Solid State Route ◽  
Microwave Dielectric ◽  
System 1 ◽  
Quality Factor Q

The microwave dielectric properties and microstructures of the (1-x)(Mg0.95Zn0.05)2TiO4-x (Ca0.8Sr0.2)TiO3 ceramics prepared using the conventional solid-state route were investigated. The structure and microstructure were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Ilmenite-structured (Mg0.95Zn0.05)TiO3 was detected as a second phase. The coexistence of the second phase, however, did not degrade the dielectric properties of the specimen because the phases were compatible. At x = 0.07, a dielectric constant (εr) of ~17.86, a quality factor (Q×f) value of ~ Q×f~133,600 Hz (at 10 GHz), and a temperature coefficient of resonant frequency (τf) of ~ –5ppm/°Cwere obtained for 0.93(Mg0.95Zn0.05)2TiO4-0.07(Ca0.8Sr0.2)TiO3 ceramic sintered at 1240°C for 4 hr. The dielectric is proposed as a candidate material for low-loss microwave and millimeter wave applications.

Ultra-Low Dielectric Permitfivity Ceramics and Composites for Packaging Applications

1986 ◽  
Vol 72 ◽  
Author(s):  
L. E. Cross ◽  
T. R. Gururaja
Keyword(s):  
High Speed ◽  
Sol Gel ◽  
Strip Line ◽  
Low Loss ◽  
Silica Films ◽  
Microwave Frequencies ◽  
Low Dielectric ◽  
Ceramic Insulators ◽  
Interconnect Systems ◽  
Low Permittivity

AbstractTo accomplish the interconnect systems which will be required in the next generation of very high speed Ga:As digital ICs, it will be necessary to use strip line techniques for signal traces which must be deposited over very low permittivity dielectric substration. Materials with relative dielectric permittivities k 〈 3.0 and very low loss tangent up to microwave frequencies will be required. For ceramic systems such values are impossible to achieve in single phase monoliths, and composite approaches are required. Techniques for processing ceramic insulators which permit the introduction of controlled pore structures are discussed. The introduction of pores degrades some other desirable properties of the ceramic such as mechanical strength and thermal conductivity so that control of both scale and location of pores is desirable.Materials investigated include sol-gel processed silica films and monoliths, reactively sputtered silica, etched glass compositions and Macro-Defect-Free (MDF) cements.

Experimental Study of Loss Mechanisms in Polymer-Metal Composites at Microwave Frequencies

1994 ◽  
Vol 347 ◽  
Author(s):  
John P. Ludman ◽  
Curtis H. Stern
Keyword(s):  
Iron Concentration ◽  
Microwave Cavity ◽  
Complex Permeability ◽  
Dc Resistivity ◽  
Low Loss ◽  
Electrically Conductive ◽  
Metal Composites ◽  
Microwave Frequencies ◽  
Polymer Metal ◽  
Conductive Particles

ABSTRACTThe microwave heatability of a low loss polymer (polypropylene) was enhanced by the addition of a conductive powder (iron). The effects of the amount (5–40% iron by volume) and size of the conductive particles on the microwave heatability were studied. The complex permittivity and complex permeability at microwave frequencies and the dc resistivity were measured. Samples were also heated in a multimode microwave cavity. Results show that microwave heating increased with increasing iron concentration. However, the penetration depth of the microwaves decreased with increasing iron content, and dramatically decreased when the polypropylene-iron composites became electrically conductive at the percolation threshold.

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