Patent ID: 6724094
Filing Date: 2004-04-20
Classification: C03C

Abstract:
An encapsulator, for encapsulating a semiconductor, wherein the encapsulator is in the form of a tube and capable of hermetically encapsulating the semiconductor which is clamped by an electrode material in the tube,wherein said encapsulator is free of lead, wherein, when said encapsulator has a viscosity of 106 dPa s, the temperature of said encapsulator is not higher than 710Â° C., and wherein said encapsulator is a glass tube made of SiO2â€”B2O3â€”Al2O3 glass comprising: SiO2 in an amount of from 40 to 70% by weight: B2O3; Al2O3; and at least two of Li2O, Na2P and K2O in a total amount of from 10 to 25% by weight.