Patent ID: 9230872
Filing Date: 2016-01-05
CPC Classification: C03C,H01L

Claim Text:
1. A lead-free glass for semiconductor encapsulation, wherein a temperature at which the viscosity of glass is 10 6 dPa·s is 670° C. or lower, and, as a glass composition, the content of CeO 2 is from 0.01 to 4% by mass, the content of Sb 2 O 3 is 0.1% by mass or less, the content of SiO 2 is from 20 to 65% by mass, the content of Bi 2 O 3 is 0 to 20% by mass, the content of B 2 O 3 is from 14 to 40% by mass, and the glass further comprises a total content of R 2 O from 14.7 to 22% by mass, wherein R 2 O is Li 2 O, Na 2 O, and K 2 O.