Patent ID: 11894213
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  G | IPC H

Claim 0:
1. An ion milling device comprising:
a vacuum chamber configured to hold a specimen in a vacuum atmosphere;
an ion gun configured to irradiate the specimen with a non-focused ion beam;
a vaporization container configured to store a mixed solution of a water-soluble ionic liquid and water;
a nozzle configured to supply water vapor obtained by vaporizing the mixed solution to a vicinity of a surface of the specimen processed by the ion beam; and
a liquid level sensor configured to monitor a liquid level of the mixed solution in the vaporization container;
a densitometer configured to measure a concentration of the mixed solution in the vaporization container; and
a solution control unit configured to control, based on the liquid level and the concentration of the mixed solution, an amount of the ionic liquid and an amount of the water supplied to the vaporization container.