초록 ▼

A process for making a fluorescent display device capable of accomplishing the mass production of a tipless fluorescent display device with good reliability and productivity is disclosed. The process is adapted to carry out, in a single chamber, a step of hermetically bonding an anode substrate and

A process for making a fluorescent display device capable of accomplishing the mass production of a tipless fluorescent display device with good reliability and productivity is disclosed. The process is adapted to carry out, in a single chamber, a step of hermetically bonding an anode substrate and a casing together to form a hermetic envelope and a step of sealing the envelope in vacua.

대표청구항 ▼

A process for making a fluorescent display device which includes electrodes such as a phosphor-coated anode a cathode and the like and a hermetic envelope having an anode substrate, a casing and an evacuation hole arranged for receiving said electrodes therein, comprising the steps of: applying oxid

A process for making a fluorescent display device which includes electrodes such as a phosphor-coated anode a cathode and the like and a hermetic envelope having an anode substrate, a casing and an evacuation hole arranged for receiving said electrodes therein, comprising the steps of: applying oxide solder to an outside surface of at least one of the sealed portions of said anode substrate and said casing; subjecting said oxide solder to a pre-baking treatment; assembling said electrodes and said casing on said anode substrate to form an envelope and heating said envelope in a chamber of a vacuum atmosphere or inert gas atmosphere to hermetically bond said anode substrate and said casing together; and forming a vacuum atmosphere in said chamber to evacuate said envelope through said evacuation hole to a high vacuum and then sealing said evacuation hole with a lid member.