| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a getter by which a mirror part having a large area is formed inside the envelope of a display element. SOLUTION: A double-sided getter 1 has a getter ring 2 and a getter material 3 accommodated therein. The getter ring 2 has a pair of annular accommodating parts 4 and 4 in a vertical direction to annularly open on its top and bottom sides. The getter material includes a Fe4 N compound added to a mixture of a BaAl4 alloy and a Ni powder. The double-sided getter 1 is installed by means of a supporting strut 6 at a predetermined position within an envelope. After the interior of the envelope is evacuated, an exhaust hole is closed, and the double-sided getter 1 is exposed to a high-frequency electromagnetic wave radiated from the outside of the envelope so that the getter material 3 is heated to vaporize toward the surfaces 7 and 7 located on an upper side and a lower side respectively. Mirror parts 8 and 8 of the getter material are respectively formed in the surfaces 7 and 7. Therefore, the mirror part can be formed inside the envelope to enlarge its area.</p> |
