| 摘要 |
PURPOSE:To perform sealing-up with a crystalline glass whose main constituents are ZnO, B2O5 and SiO2, by changing a medium comprising diethylene glycol dibutyl ether and isobutyl methacrylate ester into ash or splashing the medium at a temperature not higher than the softening point of the crystalline glass. CONSTITUTION:2-50wt% of isobutyl methacrylate is dissolved in diethylene glycol dibutyl ether. The solution is kneaded with a crystalline glass whose main constituents are ZnO, B2O3 and SiO2 to prepare printing ink. The molecular weight of the isobutyl methacrylate is set at 10<6> or less so that changing to ash and splashing are facilitated, the quantity of residual carbon is reduced and the electric properties of a semiconductor device are not deteriorated. The viscosity of the ink is adjusted to about 1.5-5X10<4> cp. The ink is printed on a P-N junction. The printed ink is maintained at the softening point of the glass for about 5-30min. As a result, no bubbles and pinholes are produced, glass projections are greatly decreased, following work is facilitated, pattern accuracy is enhanced and production yield is improved. |
