Electric lamp and discharge devices – Electrode and shield structures – Point source cathodes
Patent
1995-05-19
1998-02-10
Patel, Nimeshkumar
Electric lamp and discharge devices
Electrode and shield structures
Point source cathodes
313309, 313351, 313495, H01J 302, H01J 902, H01J 3112
Patent
active
057172781
ABSTRACT:
The invention relates to the structure of a field emitter device, to the method of fabricating a field emitter device and to the use of the field emitter device in the technical field of flat panel displays. The field emission device comprises an array (1) of widely-spaced tips (2) for emitting electrons and a perforated extracting electrode (3) facing the array of tips. An individual series resistor is formed by each of said tips itself. The widely-spaced tips are not surrounded by a layer of electrically insulating material. The tips are not surrounded by an insulating layer and the tip end is not surrounded by a gate or extraction electrode. This avoids failures like shorts between the cathode electrode and the gate or extraction electrode which could occur due to inaccurate coating or etching processes, and enhances the reliability and the life-time of the array of tips. To fabricate the field emission device, a micromechanically manufactured array (1) of widely-spaced tips (2) and a micromechanically manufactured perforated extracting electrode (3) are provided. The outer sides of the perforated extracting electrode are bonded to the array in a way that the perforated extracting electrode is facing the array. With the array of widely-spaced tips and the perforated extracting electrode being fabricated separately and bonded together subsequently, both the number of process steps required for each of the two parts and the manufacturing process costs are reduced.
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patent: 3497929 (1970-03-01), Shoulders et al.
patent: 5150019 (1992-09-01), Thomas et al.
patent: 5557160 (1996-09-01), Makishima et al.
IBM Technical Disclosure Bulletin, vol. 35, No. 4B, Sep. 1992 pp. 148-149, "Micro-Area Field emitter", pp. 148-149.
Bartha Johann
Greschner Johann
Wolf Volkhard
Aker David
International Business Machines - Corporation
Morris Daniel P.
Patel Nimeshkumar
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