Kyocera develops and provides a wide variety of ceramics for package applications. Material properties of typical multilayer ceramics are as follows:

CERAMIC MATERIAL OPTIONS		ELECTRICAL				THERMAL		MECHANICAL		CONDUCTOR MATERIAL
		Dielectric Constant		Dielectric Loss Angle (x1.0E-4)		CTE(ppm/K) (RT-400°C)	Thermal Conductivity (W/mK)	Flexural Strength (MPa)	Young's Modulus of Elasticity (GPa)
		1MHz	2GHz	1MHz	2GHz
Alumina (Al2O3)	A473	9.1	8.5	5	10	6.9	18	400	270	W, Mo
	A440	9.8	_	24	_	7.1	14	400	310	W, Mo
	A443	9.6	_	5	_	6.9	18	460	310	W, Mo
	AO610W	9.2	9.0	9	11	6.9	17	460	281	CuW
	AO630	9.3	9.1	5	23	7.0	16	460	275	CuW
	AO700	9.4	9.2	6	6	7.2	21	620	315	Mo
	AO800	9.4	9.4	4	13	7.5	16	740	300	CuW, Mo
AlN	AN242	8.7	8.6	1	170	4.7	150	400	320	W
LTCC	GL570	5.6	5.7	3	7	3.4	2.8	200	128	Cu
	GL580	6.2	6.1	4	16	10.4	2.0	270	103	Cu
	GL771	5.3	5.2	8	36	12.3	2.0	170	74	Cu
	GL773	5.7	5.8	5	23	11.7	1.9	280	95	Cu

• Material characteristics mentioned above are typical values.
  These values may change upon further improvement or modification of these materials and processes.