| 摘要 |
The present invention relates to an ion emitter device comprising an emitter member including an insulating hollow needle (10), the hollow needle presents an electrically insulating point (16) that projects from its apex (13). In addition, the needle (10) includes a cavity (11) that presents an escape orifice (14) that opens out in the vicinity of the point (16). The invention also provides a focused ion emission method using the above emitter device and an extractor electrode, the method comprising applying an extraction voltage to the extractor electrode. In addition, when the device has a regulator electrode, the method comprises applying a regulation voltage to said electrode.
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