Patent ID: 9640360
Date: 2017-05-02
CPC Classifications: H01J

Claim:
1. A gas field ion source comprising: an emitter tip configured to generate ions; an emitter-base mount configured to support the emitter tip; a mechanism configured to heat the emitter tip; an extraction electrode installed to face the emitter tip and configured to include an opening allowing the ions to pass therethrough; and a mechanism configured to supply a gas to the vicinity of the emitter tip, wherein the emitter tip heating mechanism is a mechanism of heating the emitter tip by electrically conducting a filament which has a shape of a straight line connecting at least two terminals, connection points between the terminals and the filament is connected by the filament at an approximately shortest distance, and the emitter tip is connected to a substantial center of the filament, and wherein a second wire material connects the at least two terminals and the second wire material and the filament are connected to a base portion of the emitter tip.