Method of making phosphor screen for color cathode ray tube

Abstract

Abstract A METHOD OF MAKING A PHOSPHOR SCREEN OF A MULTICOLOR CATHODE RAY TUBE WITH COMPRISES THE STEPS OF COATING THE INNER FACE OF THE FACEPLATE OF THE CATHODE RAY TUBE WITH A PHOTOSENSITIVE ADHESIVE BINDER DEPOSTING A POSITIVE PHOTOSENSITIVE LAYER OVER THE ENTIRE AREA OF THE COATED PHOTOSENSITIVE ASHESIVE BINDER, DRYING THE DEPOSITED PHOTORESIST, EXPOSING THE PHOTORESIST LAYER TO IRRADIATION BY LIGHT THROUGH A MASK HAVING A PREDETERMINED PATTERN TO EXPOSE THE UNDERLYING PHOTOSENSITIVE ADHESIVE BINDER LAYER AT PREDETERMINED AREAS, DEVELOPING THE EXPOSED INNER FACE OF THE FACEPLATE TO REMOVE THE PHOTORESIST LAYER FROM THE PHOTOSENSITIVE ADHESIVE BINDER LAYER TO EXPOSE IT AT THOSE AREAS EXPOSED TO LIGHT, RINSING THE DEVELOPED INNER FACE OF THE FACEPLATE WITH WATER, AND DUSTING PHOSPHOR OF A DESIRED COLOR ON THE EXPOSED AREAS OF THE PHOTOSENSITIVE ADHESIVE BINDER LAYER. THE PHOTOSENSITIVE ADHESIVE BINDER IS INSOLULBE IN WATER AND IN A DEVELOPER AFTER BEING EXPOSED TO LIGHT AND BECOMES STICKY DUE TO ABSORPTION OF WATER.

Inventors

• 👤 Masahiro Nishizawa

Bibliographic Details