The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2004
Filed:
Oct. 29, 2002
Kazuaki Shimizu, Takatsuki, JP;
Rigaku Industrial Corporation, Osaka, JP;
Abstract
There is provided a multilayered spectroscopic device effective to achieve in a short length of time the highly accurate fluorescent X-ray analysis of boron wherein the influence that may be brought about by the interfering X-rays and the background is sufficiently reduced and the strength of reflection of B-K&agr; line is sufficient. In this multilayered spectroscopic device lanthanum (La), an alloy containing lanthanum as a principal component or lanthanum oxide (La O ) is used for the reflecting layers and boron is used for the spacer layers and the periodic length d is chosen to be within the range of 7 to 14 nm and the film thickness ratio of the reflecting layers to the spacer layers is chosen to be within the range of 2/3 to 3/2. It has a total laminated film thickness t of a value sufficient to allow the strength of reflection of B-K&agr; line to be equal to or higher than 98% of a saturation value.