The filament consists of a very thing tungsten wire coated with barium, strontium and calcium oxides. Application of a specified voltage raises the temperature of the filament cathode and causes thermionic emission.

The contact lead electrically connects filament voltage to the transparent conductive layer formed on the inside of the front glass.

The anode electrode consists of a conductor such as graphite.

The insulation layer electrically insulates the anode and grid electrodes from the wiring pattern.

The wiring pattern connects the anode electrodes and grid to the metal lead.

Applying positive or negative voltages to the grid controls the flow of electons.

Conventional soda-lime glass is used for the substrate. The wiring pattern and other patterns are formed on the substrate.

The leads are made of 426 alloy (Ni 42%. Cr 6%, Fe balance), which has a similar thermal coefficient to glass.

The getter is important in maintaining a high vacuum level by absorbing residual gasses left inside the display after the exhausting process.

The exhaust tip is used to remove gasses from inside the display.

A protective window to enclose the display.

Frit glass is a low temperature melting glass used for bonding glass parts and leads. It acts as a seal to maintain the vacuum inside the display.

The phosphor is formed into the desired graphic pattern. When the electrons emitted by the filament collide with the anode, the phosphor is excited and emits light.

The through hole is formed on the insulation layer. It connects the anode electrode and wiring pattern.

The transparent conductive layer is formed on the inside of the front glass. It protects the display from external electrostatic charges.