| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low dielectric constant and low dielectric loss lead-free glass from which a green sheet having excellent preservation stability is obtained, which is free from the deposition of crystal even when being fired at ≤900°C, with which an electronic circuit board having excellent dimensional precision can be manufactured, and a composition for the electronic circuit board. <P>SOLUTION: The lead-free glass contains 68-72% SiO<SB>2</SB>, 19-22.5% B<SB>2</SB>O<SB>3</SB>, 3-7% Al<SB>2</SB>O<SB>3</SB>, 0-2.5% CaO, 1-6% SrO, and 2-6% CaO+SrO by mol. Preferably, the composition for the electronic circuit board is composed of 40-100% powder of the lead-free glass and 0-60% ceramic filler by mass. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
