Patent ID: 9673020
Date: 2017-06-06
CPC Classifications: H01J

Claim:
1. A charged particle beam device comprising: a charged particle irradiation unit which irradiates a sample with a primary charged particle beam emitted from a charged particle source; a first housing which is configured to support the charged particle irradiation unit and maintain an inside of the first housing in a vacuum state; a second housing which is provided in addition to the first housing and houses the sample; an evacuation device which evacuates the inside of the first housing; a detector which detects a charged particle beam obtained by the irradiation in the first housing; a partition wall that separates the inside of the first housing and an inside of the second housing from each other at least along part of an interface between the first and second housings and which is formed as at least part of either the first or second housing or is separate from the first and second housing; a thin film which transmits the primary charged particle beam and secondary electrons obtained by irradiation of the sample with the primary charged particle beam; a thin film holding part which holds the thin film; a thin film holding part support which extends from the partition wall to further separate the inside of the first housing and the inside of the second housing from each other, and supports the thin film holding part; and a fixation member which fixes the thin film holding part to the thin film holding part support and protrudes into the inside of the second housing, wherein the thin film is held by the thin film holding part to protrude from the thin film holding part toward the inside of the second housing, and wherein the fixation member is disposed to protrude toward the inside of the second housing more than the thin film holding part support and less than the thin film.