Alumina ceramic substrate is the preferred material for current hybrid integrated circuits. It is widely used to make various microwave devices, such as dielectric resonators, filters, dielectric antennas, dielectric wave guide circuits, etc. It can meet technological fields for the integration, miniaturization, high reliability, and low cost of microwave circuits.

SPECIFICATIONS

MAIN TECHNICAL INDEX

Parameters	Test Condition	Index
Surface Roughness Ra	–	≤0.3μm(Sintered)
Surface Roughness Ra		≤0.025μm(Polished)
Volume Density		≥3.8g/cm³
Flexural Strengtr	–	≥450MPa
Warpage	–	≤0.3%
Coefficient of Linear Expansion	300℃	6.5ppm/℃~75ppm/℃
Thermal conductivity	25℃	≥27W/(m·K)
Volume resistivity	25℃	≥1014Ω ·cm
Breakdown Strength	D.C	≥18KV/mm
Dielectric Constant	8GHz	9.9±0.2
Loss Angle Tangent	8GHz	≤0.0002

PHYSICAL DIMENSION

Operating Environment Conditions		Operating Environment Conditions
Length and Width(mm	Length and Width Tolerance(mm)	Thicknesses(mm)	Thicknesses Tolerance(mm)
50.8×50.8	±0.5	0.127	±0.010
48×60		0.254	±0.010
60×60		0.381	±0.010
60×70		0.508	±0.015
100		0.635	±0.015