We use the tape-casting process to manufacture thick film substrates for ceramic hybrids. We can deliver as-fired substrates as well as precision machined, lapped and polished substrates. Our specialty is in making large area substrates. Our current capability is 15"x 15". We are currently expanding our production capacity to make 36"x 36" substrates, which will soon be one of the bigger ,if not the biggest on the market.

CTAL-96 - Through the tape-casting process, we manufacture 96% alumina substrates with excellent as-fired surface finish. The surface of these substrates require minimal to no lapping and polishing, making it very cost effective to our customers.

CTAL-94 - For special applications, we manufacture 94% alumina substrates tailored for specific dielectric applications.

CTAL-92 - This 92% alumina material is suitable for thick film applications. This is offered in different colors: white, dark brown, and black.

Dielectric Properties of 96%

Properties		Alumina
Name		CTAL-92	CTAL-94	CTAL-96
Phases		Nom 92% Alumina	Nom 94% Alumina	Nom 96% Alumina
Density		3.65	3.75	3.8
Surface Finish (micro-inches) CLA	As-Fired	15	15	10
	Polished	6	6	4
Strength (25C) (PSI)		48x103	51x103	55x103
Conductivity (25 C) (W/m °K)		16.5	21.2	25.2
Thermal Expansion (25-600C) (10-6 / C)		6.8	7.1	7.8
Dielectric Strength (ac-kV/mil)	50 mils	420	425	410
	25 mils	550	560	550
DC Breakdown Voltage (Volts / mil)	40 mils	1400	1450	1500
Constant	1 kHz	8.2	8.5	9
	1 MHz	8.2	8.5	9
Loss Tangent	1 kHz	0.0006	0.0007	0.0005
	1 MHz	0.0004	0.0004	0.0003
Volume Resistivity (ohm-cm2/cm)	25 C	> 1014	> 1014	> 1014
	300 C	1.5x1011	3.0x1011	1.8x1012
	1000 C	8.5x105	9.5x105	1.5x106
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