| 摘要 |
PURPOSE:To obtain a product of high yield and quality with good adhesive of a pellet by employing a pellet bonding low melting point glass having a melting point lower than the softening point of a sealing low melting point glass. CONSTITUTION:A pellet bonding low melting point glass 7 is formed to have a softening point of the temperature lower than a sealing low melting point glass 6, different from a sealing low melting point glass 6. According to this constitution, even if ceramic base is heated when a pellet 3 is fixed to a ceramic base 2, it may be heated to the softening point of the glass 7, but the glass 6 higher than the glass 7 may not be softened. Accordingly, the flow of the glass 6 into a cavity at the time of fixing the pellet 3 can be prevented, and the pellet can be preferably fixed by improving the softening of the glass 7. |
