Patent ID: 7067171

Claim:
A method of manufacturing a spacer for use in an electron beam apparatus having an airtight container with electron-emitting devices contained therein and spacers provided in the airtight container, the method comprising: preparing a spacer substrate having a portion, which is treated so that substantially no acute angle in a cross-section is provided at a corner portion between a first surface, which is flat, and a second surface, wherein the first surface faces a substrate of the container and the second surface is a side surface to the first surface when the spacer is arranged in the container; and applying a liquid material for a film to at least a part of the corner portion of the spacer substrate from a nozzle by a bubble generated using thermal energy, or by a piezoelectric element, wherein the spacer substrate is such that the following relationship is satisfied: ( t 2 +4 h 2 )< s 2 <( t+ 2 h ) 2 , wherein t is a maximum value of a thickness of the spacer substrate when the film is formed from the liquid material, h is a height of the film, and s is an inner peripheral length of a section of the film.