| 摘要 |
PURPOSE:To enable to hermetically-seal a stem and a cap subject to stable and wide range of weldability by a method wherein Au is substituted for Ni as for the plating metal of a weld. CONSTITUTION:Part A inn the figure represents a weld when a stem 1 and a cap are hermetically-sealed while a device normally sealed thereby is composed of a chip 3 formed of a fine electrode and a wiring 4. The surface of welded stem 1 is plated with Au preferably exceeding 0.05mum in thickness. Through these procedures, the range of excellent weldability can be extended 2.5 times compares with the conventional range. |
