公开(公告)号：US3808498A

公开(公告)日：1974-04-30

申请号：US24689572

申请日：1972-04-24

Applicant: JEOL LTD

Inventor： FUJISAWA M

IPC: G01Q30/02 ,  H01J3/02 ,  H01J37/06 ,  H01J37/065 ,  H01J37/07 ,  H01J37/24 ,  H01J19/38

CPC classification number: H01J3/026 ,  H01J37/065 ,  H01J37/07 ,  H01J37/241

Abstract: This specification discloses an electron beam generating source having a control electrode comprising electrically conductive and nonconductive or slightly conductive layers, said nonconductive or slightly conductive layer facing an anode. The surface of said conductive layer in contact with said nonconductive or slightly conductive layer faces a cathode, thereby preventing electron emission from said contact surface and so by eliminating or almost entirely eliminating micro discharge.

Abstract translation: 本说明书公开了一种具有控制电极的电子束产生源，该控制电极包括导电和非导电或稍微导电的层，所述非导电或微导电层面向阳极。 与所述非导电或略导电层接触的所述导电层的表面面向阴极，从而防止从所述接触表面发射电子，因此通过消除或几乎完全消除微量放电。