Patent ID: 8624186

Claim:
A method for imaging a specimen surface by replacing a specified detection area to receive signal charged particles, the method comprising: providing a charged particle beam system to irradiate charged particles onto the specimen surface; providing a sectional main detector for receiving the signal charged particles emanated from the specimen surface, wherein the sectional main detector has at least two sections for configuring a first stereo image under a regular large beam current, low resolution mode; providing a movable high gain detector set for receiving the signal charged particles emanated from the specimen surface or providing a movable sectional high gain detector for receiving the signal charged particles emanated from the specimen surface, wherein the movable high gain detector set, en above an objective lens of the charged particle beam system, has at least one section for configuring an image under a small beam current, high resolution mode, and the movable sectional high gain detector has at least two sections for configuring a second stereo image under the small beam current, high resolution mode; providing an E×B charged particle analyzer to direct the signal charged particles emanated from the specimen surface to the detection area set; providing a control computer to calculate superimposed magnetic field strength and electrostatic field strength of the E×B charged particle analyzer that diverts the emanated electrons according to an incident beam energy and preset imaging requirement; and generating images based on the detected signal particles received by one of the detectors.