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US 4,923,421 AGranted
Method for providing polyimide spacers in a field emission panel display
AssigneeInnovative Display Development Partners
InventorsIvor Brodie, Henry R. Gurnick, Christopher E. Holland, Helmut A. Moessner
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Abstract
A flat panel display of the field emission cathode type is described having polyimide spacers or pillars separating the emitting surface and display face of the same. A method of forming the spacers by integrated circuit techniques also is described.
Claims10
A process for forming and using spacers between the emitting surface of a field emission cathode array and an opposing display face, comprising the steps of
- A. applying a layer of material from which said spacers are to be formed either to said cathode surface or said face;
- B. patterning said layer of material with the desired spacer matrix;
- C. removing said layer from said face or surface except for portions thereof to form said spacer matrix;
- D. baking said spacer matrix to a high temperature in an ultra-high vacuum to remove volatile material from spacers of said matrix;
- E. sandwiching together said display face and said cathode surface with spacers of said matrix therebetween;
- F. forming a vacuum between said surface and said face;
- and
- G. retaining a vacuum between said surface and said face during emission from said field emission cathode surface toward said display face.
5 more elements
Dependencies are inferred from the claim text.