Global patent index - EP 1029338 A1

EP 1029338 A1 2000-08-23 - METHOD FOR MAKING AN ELECTRON SOURCE WITH MICROTIPS

Title (en)

METHOD FOR MAKING AN ELECTRON SOURCE WITH MICROTIPS

Title (de)

VEFAHREN ZUR HERSTELLUNG EINER MIKROSPITZEN-ELEKTRONENQUELLE

Title (fr)

PROCEDE DE FABRICATION D'UNE SOURCE D'ELECTRONS A MICROPOINTES

Publication

EP 1029338 A1 (FR)

Application

EP 98952833 A

Priority

  • FR 9802337 W
  • FR 9713794 A

Abstract (en)

[origin: FR2770683A1] The invention concerns a method which consists in making a structure comprising a substrate (10), at least one cathode conductor (12), a first insulating layer (14), a grid layer (16) and a second insulating layer (71). It consists in forming holes through the insulating layers and the grid layer, in forming a deposit (80) of a material emitting electrons in the holes up to the upper level thereof, treating this deposit to minimise or prevent a chemical etching from the top thereof, eliminating the second insulating layer and carrying out a chemical etching of the material to obtain the microtips. The invention is useful for making flat screens.

IPC 1-7 (main, further and additional classification)

H01J 9/02

IPC 8 full level (invention and additional information)

H01J 9/02 (2006.01)

CPC (invention and additional information)

H01J 9/025 (2013.01)

Citation (search report)

See references of WO 9923680A1

Designated contracting state (EPC)

DE GB IT

EPO simple patent family

FR 2770683 A1 19990507; FR 2770683 B1 19991126; EP 1029338 A1 20000823; JP 2001522126 A 20011113; WO 9923680 A1 19990514

INPADOC legal status

2002-12-11 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020601

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000413

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB IT