| 摘要 |
PURPOSE: A ferroelectric emitter is provided to allow electrons to be emitted from narrow or wide portion of a mask pattern, pattern a closed doughnut pattern, and eliminate heating to Curie temperature in electron emission of a pyroelectric. CONSTITUTION: A ferroelectric emitter comprises a ferroelectric layer(11) and an insert electrode(12) at the top center of the ferroelectric layer(11). A dielectric layer(13) is formed on both sides of the top of the ferroelectric layer(11) and the top of the insert electrode(12) to cover the insert electrode(12). A pattern is formed into the top of the dielectric layer(13). The insert electrode(12) is located under the patterned portion of the dielectric layer(13). A dummy electrode(14) is formed on a remaining portion, that is not patterned, of the top of the dielectric layer(13). A bottom electrode(15) is formed under the ferroelectric(11) to apply external charges during operation of the ferroelectric emitter.
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