Patent ID: 6533633
Filing Date: 2003-03-18
Classification: H01J

Abstract:
A manufacturing method of an aperture fluorescent lamp for forming an aperture portion opened for light projection by forming a phosphor layer in an inner surface of a glass tube, and then eliminating said phosphor layer of a predetermined region in an axial direction of said glass tube, said manufacturing method comprising:a member inserting step of inserting one selected from a thread-like member and a belt-like member having a predetermined surface roughness and a predetermined tensile strength into said glass tube having said phosphor layer formed therein; and a phosphor exfoliating step of exfoliating a phosphor by sliding said one selected from said thread-like member and said belt-like member in relative displacement to said phosphor layer while said one selected from said thread-like member and said belt-like member is in contact by pressure with said phosphor layer formed in said predetermined region.