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:
May. 01, 2018
Filed:
Apr. 28, 2015
Hitachi High-technologies Corporation, Minato-ku, Tokyo, JP;
Noritsugu Takahashi, Tokyo, JP;
Yasunari Sohda, Tokyo, JP;
Wataru Mori, Tokyo, JP;
Yuko Sasaki, Tokyo, JP;
Hajime Kawano, Tokyo, JP;
HITACHI HIGH-TECHNOLOGIES CORPORATION, Tokyo, JP;
Abstract
A charged-particle-beam device used for measuring the dimensions, etc., of fine circuit patterns in a semiconductor manufacturing process, wherein corrections are made in the defocusing and astigmatism generated during changes in the operating conditions of a Wien filter acting as a deflector of secondary signals such as secondary electrons, and the display dimensions of obtained images are kept constant. In the charged-particle-beam device, the Wien filter () is arranged between a detector and a lens () arranged on the test-sample side among two stages of lenses for converging a charged-particle beam, and a computing device () is provided for the interlocked control of the Wien filter () and a lens () arranged on the charged-particle-source side among the two stages of lenses.