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DLTS User Meeting 2023 - Q&A

21.12.2023

DLTS User Meeting 2023

This blog post presents the questions and answers raised during the DLTS User Meeting 2023. The meeting intended to bring together the community who may face common measurement challenges and allow them to share knowledge and expertise.

利用锁相放大器和MFITF夹具测量电阻的热噪声电压

19.12.2023

Teaser

现代物理学中有一个经典的实验,即测量电阻上的热噪声电压,首次测量是由 John B. Johnson 于1926年在贝尔实验室中首次完成,并由 Harry Nyquist完成理论解释,因此热噪声又被称为Johnson噪声或者Johnson-Nyquist噪声。其本质来自于载流子的无规则热运动,这一实验也可以用作对于玻尔兹曼常量的计算,本实验将对于纯电阻器件进行测量其热噪声电压,并给出测量建议。

Capacitance Transients at Variable Temperature

05.10.2023

LabOne DAQ Module showing capacitive transients

This blog post shows the ease of set-up of the MFIA to measure capacitive transients for self-build DLTS. The combination of MFIA plus third-party temperature stage brings the possibility to tune your DLTS measurement parameters to suit your sample. Home-building your DLTS system with the MFIA gives you flexibility and the freedom to choose the test signal amplitude, frequency and even the mode of stressing pulse. 

Different Views on Quality Factor and Equivalent Circuit Modeling

21.09.2023

MFIA front

For ease of communication, scientific nomenclature is often named as short as possible. Unfortunately, sometimes this convention leads to different terms sharing the same name, which may lead to confusion. Taking piezoelectric impedance and dielectric impedance as examples in this blog post, we will clarify 2 ambiguous terms, the quality...

Detecting Covid Virus Using an MFIA Impedance Analyzer

14.06.2023

MFIA

In the past few years, the spread of COVID-19 pandemic has led to a tremendous development in detecting SARS-CoV-2 (and HCoV-229E) viruses. Whereas polymerase chain reaction-based fluorescence is known to be accurate, it is time-consuming and requires sophisticated setup and expertise. On the other hand, lateral flow assay (LFA) is...

Piezoelectric Impedance: Measurement and Modeling

13.04.2023

teaser piezo

Piezoelectric materials can produce electricity under mechanical stresses, and often find uses in both sensing and transducing applications. In this blog post, we focus on the electrical impedance measurement of piezoelectric materials, using an MFIA Impedance Analyzer (measuring the electrical response of piezoelectric devices often requires a charge integrator, which...

Setting Up Drive Level Capacitance Profiling Measurements

14.03.2023

DLCP

Drive level capacitance profiling (DLCP) is a powerful technique to accurately determine the charge carrier density in semiconductors when deep level states are present. It is often considered an improvement over the widely applied characterization technique known as capacitance-voltage (C-V) profiling...

Electrochemical Impedance Spectroscopy Beyond 300 GΩ

19.01.2023

MFIA Impedance Analyzer

In electrochemistry, the characteristics of a given process can be assessed by electrochemical impedance spectroscopy (EIS). A semicircle in the Nyquist plot usually corresponds to electrochemical processes that can be modelled as a parallel connection of a resistor (R) and a capacitor (C). The diameter of the semicircle provides the value of R, while the associated time constant (also known as relaxation time) is given by RC...

Impedance Measurements on Grounded Components

09.01.2023

Setup for measuring grounded components with the MFIA

The MFIA is a high-precision impedance analyzer. It measures voltage, current and phase to calculate impedance. As is the case for most impedance analyzers, the measurement circuit is designed so that the device under test (DUT) is operated under floating conditions, which means that none of the terminals of the DUT is connected to the ground...

Dielectric Impedance Measurements of Chocolates

19.12.2022

winter card

Swiss chocolates are famous worldwide thanks to their high quality of taste. Switzerland is also renowned as the country with the highest chocolate consumption per capita. Today, many popular brands can be found even in the supermarket. Are you curious about what makes the chocolates special? And which non-destructive technique (NDT) can be employed to measure them?

Understanding the Sweep Duration in the LabOne Sweeper Module

31.08.2022

sweeper logo

A fast sweep capability is often desired by researchers working on fast physical phenomena or short-lived samples, and may also be beneficial purely from a time-saving perspective. This blog post will elucidate the factors on which the sweep rate depends and guide you along several possible ways to make the...

DLTS User Meeting 2022 – Q&A

25.07.2022

DLTS User Meeting 2022

This blog post presents a selection of questions and answers raised during the DLTS User Meeting 2022. The meeting intended to bring together the community who may face common measurement challenges and allow them to share core competencies and know-how.

Hands-on Electrochemical Impedance Spectroscopy

28.06.2022

Hands-on Electrochemical Impedance Spectroscopy

This blog post accompanies the webinar, which introduced basics of electrochemical impedance spectroscopy (EIS) and provided practical tips & tricks to measure EIS consistently. We share the recording, additional information and answers to the questions asked by the attendees during the webinar.

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