나노복합재료연구실 ( Nano Composite Research Lab.)
1. Purpose of this study
■ Measurement of Young's modulus using sonic resonant test
■ Measurement of Young's modulus using beam bending test
2. Introduction
Young's modulus is one of the important materials properties that is related with the bonding force between atoms or ions in materials. That will give a cle
Measurement 의 가장 중요한 측면은 특성에 대해 어떻게 숫자를 부여 할 것인가에
대한 문제
숫자를 적용하는 방법에 있어서 그 방법은 표준적이여야 하며
바뀌어서는 안됨
마케팅 리서치에서 , 숫자를 사용하는 이유
In marketing research, numbers usually are assigned for one of two reasons:
To permit statistical analy
of the reverse voltage." I_s, the reverse bias saturation current for an ideal p-n diode is given by,
Figure 4. MOS capacitor
So, we expect graph bellow.
Figure 5. Threshold voltage expectation
Capacitance is the ability of a body to hold an electrical charge. Capacitance is also a measure of the amount of electrical energy stored for a given electric potential. Capacitance is d
2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara