| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low permittivity ceramic substrate low in relative permittivity, small in loss in a high frequency zone, and small in temperature dependence, enabling low temperature sintering where conductors having high electric conductivity such as Ag, Au and Cu can be simultaneously sintered, and a method for manufacturing the same. <P>SOLUTION: This low permittivity ceramic substrate for high frequency components contains at least an LnBO<SB>3</SB>crystal (Ln is one or more rare earth elements among Y, La and Nd) and is obtained by firing a raw material comprising, in mol% of components expressed by oxides, 40-65% Al<SB>2</SB>O<SB>3</SB>, 15-35% B<SB>2</SB>O<SB>3</SB>, 10-20% CaO, 0.1-14% ZnO, 0-2% MnO, 0-2% R<SB>2</SB>O (R is one or more among Li, Na and K) and 0.1-2% Ln<SB>2</SB>O<SB>3</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT |
