Abstract: A gas discharge display panel incorporating phosphor protected by undercoats and overcoats. The device is comprised of a pair of substrates, each of which has an electrode array thereon with the dielectric coating on at least one of the electrode arrays. An array of channels having sidewalls is formed in the dielectric layer with an array of channels corresponding to and aligned with one of the electrode arrays. The channels have sidewalls and lands between channels with a protective undercoat on the channel sidewalls and a photoluminescent phosphor on the protective undercoat.