The invention discloses a manufacture method for upper and lower medium basal plates in ac gas discharge display screen, which comprises: preparing upper/lower medium missing printing boards with figure added medium line of 3~8mm width and 8~50um thickness based on the original; manufacturing ITO, BUS conflux electrode and black strip on upper glass base by turns, then preparing transparent medium layer with upper medium missing printing board, and forming MgO protection layer; adding Add electrode on lower glass base, preparing lower medium layer with lower medium missing printing board, then forming barrier with normal technology and red, green and blue fluorescent powder, and finally forming glass sealing frame of low-melting point on lower medium layer and ensuring the low-melting point glass line brim in order after pre-sintering. When sealing upper and lower base, clamping the low-melting point glass frame between two base medium to ensure it vapor-tight when exhausting. |