| 摘要 |
<p>In order to prevent foreign gas from accumulating in the vacuum space of a container by microleakage etc., so-called getter substances are used during evacuation. This is usually effected by means of a complicated getter activation apparatus, by which the getter materials are activated in the vacuum part. The object of the present invention is to provide a method of getter activation which can be performed without great cost. For this purpose, it is proposed that the getter substance is activated by local heating. Thus, the getter substance is received in a tube and is activated by means of a heater element provided on the outside of the external container. Due to this simple arrangement, there is no difficulty, even at a later time, in effecting re-evacuation of the vacuum space by local heating of the getter substance. <IMAGE></p> |
