公开(公告)号：US3914634A

公开(公告)日：1975-10-21

申请号：US31741172

申请日：1972-12-21

Applicant: PHILIPS CORP

Inventor： OVERALL COLIN DOUGLAS ,  WASHINGTON DEREK

IPC: H01J43/24 ,  H01J31/50 ,  H01J43/22 ,  H01J43/10

CPC classification number: H01J43/22

Abstract: Perforate metal layers having aligned apertures defining channels are closely spaced from each other by uniformly distributed arrays of separator elements which accurately maintain relative spacing under varying temperature conditions even though the separator elements and metal layers have different coefficients of thermal expansion.

Abstract translation: 具有限定通道的对准孔的穿孔金属层通过均匀分布的分离器元件阵列彼此紧密地间隔开，即使分离器元件和金属层具有不同的热膨胀系数，也能在变化的温度条件下精确地保持相对间隔。