Abstract: There is disclosed a method of easily producing a long-lived ion sensitive film having excellent durability and used in an ion sensor. The method starts with preparing a monomer mixture consisting chiefly of monomer units including a functional group and a second group of bonded atoms. The functional group has a function of identifying a certain chemical substance. The second group can become an active species that induces a polymerization or bridging reaction by being irradiated with an electron beam or radiation. Then, the monomer mixture is irradiated with the electron beam or radiation in a low energy range. Thus, the monomer mixture is polymerized.
Type:
Application
Filed:
December 23, 2002
Publication date:
September 4, 2003
Applicant:
JEOL Ltd. and JEOL Engineering Co., Ltd.
Abstract: There is disclosed a long-lived thermal field emission electron gun for use in a scanning electron microscope. The gun has a tungsten tip. The surface of this tip is coated with zirconium, zirconium oxide, titanium or titanium oxide. A wire member is mounted above the front end of the tungsten tip to prevent the coating of zirconium or other material from slipping off.
Type:
Grant
Filed:
November 12, 1997
Date of Patent:
October 5, 1999
Assignee:
JEOL Ltd. and JEOL Engineering Co., Ltd.