1. Chain Microstructure
Stiffness: Chin flexibility, 분자 사이의 거리, Side chain의 flexibility 등의 영향
Chain Flexibility
single chain에서의 rotation이 결정한다. 입체장애로 인하여 Chain flexibility가 낮아지면 Tg는 증가한다.
Flexible side group
Side group에 의하여 분자간의 거리가 증가할 경우 free volume이 증가하고
Background of Experiment
□ Al-Si Alloy
AI + Si = Al-Si Alloy
1. Low melting point
2. light
3. Large heat capacity
4. Insoluble to each other
.
.
.
Result and Analysis - EDS
□ Composition Analysis
Al, Si is almost insoluble to each other at rsoom temperature.
All solid phase will have either 100% Al phase or 100% Si phase.
4. Condition
If reflow, IMC layer occurs between the solder ball and substrate. IMC layer's composition changes depending on reflow time.
Temperatuer
255℃
Reflow time
1s, 1min, 5min, 10min, 20min
Experimental conditions
5. Analysis
IMC layer change was observed according to the reflow time.(Reflow time : 1s, 1min, 5min, 10min, 20min). Do refer to
→ ALD is based on the sequential use of a gas phase
chemical process. ALD film growth is self-limited and
based on surface reactions, which makes achieving
atomic scale deposition control possible.
☞ Self-limited growth
☞ Atomic scale deposition
☞ Easy way to produce
uniform, crystalline,
high quality thin films.
-결정성 평가
-FWHM (Full wi
Temperature Modulated DSC(TMDSC), High pressure DSC(HPDSC),
Photo DSC(UV-DSC), Maximum resolution TGA or High resolution TGA(MaxRes TGA or HighRes TGA), Reactor TGA, Dynamic Load TMA(DLTMA), Evolved Gas Analysis or Coupling techniques(EGA or TGA-MS/TGA-FTIR)
Difficult to obtain
reproducibility
A few difference of condition
and temperature
→ Enormous effect on result
→ Hard to