Invention Grant
- Patent Title: Arrangement for spatially resolved determination of the specific electrical resistance and/or the specific electrical conductivity of samples
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Application No.: US15555116Application Date: 2016-03-02
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Publication No.: US10466274B2Publication Date: 2019-11-05
- Inventor: Philipp Wollmann , Wulf Graehlert , Eric Weissenborn
- Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- Applicant Address: DE Munich
- Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- Current Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- Current Assignee Address: DE Munich
- Agency: Jacobson Holman, PLLC.
- Priority: DE102015203807 20150303; DE102015208026 20150430
- International Application: PCT/EP2016/054398 WO 20160302
- International Announcement: WO2016/139233 WO 20160909
- Main IPC: G01R1/07
- IPC: G01R1/07 ; G01R27/26 ; G01N21/84 ; G01N27/04

Abstract:
An arrangement for a spatially resolved determination of the specific electrical resistance and/or of the specific electrical conductivity of a sample at different positions, in whicha plurality of detectors are configured for a spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval and is incident onto the detectors. A radiation onto a surface takes place with homogeneous intensity. The measurement signals of the detectors detected with spatial resolution and wavelength resolution within a wavelength interval are compared for each detected position with a wavelength-resolved function that are compared by calculation of the propagation of electromagnetic radiation in multilayer systems while using an optical model for a physical description of the examined sample while taking account of the wavelength-dependent progressions of the linear optical refractive indices n and of the coefficients of absorption k of all the materials and/or substances forming the sample that can be approximated by a physical function of a complex refractive index of the conductive material or substance. They are brought to a sufficient overlap with a calibration curve progression by a change of the parameters of the physical function to determine the specific electrical resistance and/or the specific electrical conductivity at different positions with spatial resolution.
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