Patent ID: 8779400

Claim:
An ion beam machining and observation device comprising: a vacuum chamber and a gas supply mechanism to introduce gas into the vacuum chamber, a gas field ion source to generate gas ions in the vacuum chamber, a sample chamber for storing a sample, and an ion beam irradiation column connected to the vacuum chamber to extract an ion beam from the gas field ion source and irradiate the ion beam onto the sample: wherein the gas supply mechanism includes at least two gas introduction systems, each system having a gas cylinder, a gas volume control valve and a stop valve; and further comprising: a gas switching control unit for controlling the gas volume control valve of each system to set up gas pressure conditions for the vacuum chamber, and the stop valve of each system to switch the kind of gas being introduced into the vacuum chamber; wherein the gas switching control unit has a control unit to control formation of a pyramid structure of atoms at an apex of an emitter tip of the gas field ion source after the gas switching control unit switches the kind of gas being introduced into the vacuum chamber by the stop valve of each system.