Patent ID: 8822919
Filing Date: 2014-09-02
Classification: G01N,H01J,H01L

Abstract:
1. A feed-through unit incorporated in a detector of an electron beam apparatus, said feed-through unit comprising: a feed-through section made of electrical insulating material, the feed-through section having an inside surface and an outside surface, the feed-through section partitioning between an inside of the feed-through unit and an outside thereof, which are different from each other in a pressure and a kind of gas, wherein the inside of the feed-through unit is vacuum; at least one electricity introduction pin fixedly attached to the electrical insulting material of said feed-through section, the electricity introduction pin having an inside end extending in the inside of the feed-through unit and an outside end extending in the outside thereof; a functional element provided inside the feed-through unit, the functional element having a first surface and a second surface opposed to the first surface, the first surface directly contacting the inside surface, the second surface provided with die pad sections of the functional element, and a connecting wiring provided inside the feed-through unit, the connecting wiring connecting said at least one electricity introduction pin with the die pad sections, wherein said functional element includes a sensor surface to detect signals, the second surface including the sensor surface, which converts the optical output of a fiber optic plate into a digital electric signal.