公开(公告)号：US20010009835A1

公开(公告)日：2001-07-26

申请号：US09741082

申请日：2000-12-21

Inventor： Sung-hwan Moon ,  Ji-hoon Ahn ,  Bu-chul Shin

IPC: H01J009/04

CPC classification number: H01J9/04 ,  H01J9/08 ,  Y10T29/41 ,  Y10T29/49812

Abstract: There is provided a method for fabricating an indirectly-heated cathode structure, including the steps of inserting a heater formed in a predetermined shape into a space of a mold, injecting a thermoplastic resin into the space of the mold to mold the heater by the thermoplastic resin, inserting the heater molded by the thermoplastic resin into a sleeve having a cap on its top end, connecting the sleeve and the heater by means of a support body to assemble a cathode structure, and heating the cathode structure to remove the thermoplastic resin used for molding the heater. Therefore, in an indirectly-heated cathode structure, a heater deviating from center can be prevented, and it is easy to adjust the gap between a heater, a sleeve and a cap. Thus, the heater can be positioned at a desired position inside the sleeve, thereby preventing current leakage from being generated due to a breakdown in the heater. In particular, the sleeve and the cap can be uniformly heated, thereby reducing a local difference in the thermion emitting density.

Abstract translation: 提供一种用于制造间接加热的阴极结构的方法，包括以下步骤：将形成为预定形状的加热器插入到模具的空间中，将热塑性树脂注入模具的空间中以通过热塑性塑料 树脂，将由热塑性树脂成型的加热器插入到其顶端具有盖的套筒中，通过支撑体连接套筒和加热器以组装阴极结构，并加热阴极结构以除去所使用的热塑性树脂 用于模制加热器。 因此，在间接加热的阴极结构中，可以防止从中心偏离的加热器，并且容易调节加热器，套筒和盖子之间的间隙。 因此，加热器可以定位在套筒内的期望位置，从而防止由于加热器中的故障而产生电流泄漏。 特别地，可以均匀地加热套管和帽，从而减少热离子发射密度的局部差异。