Circuit theory and property of passive elements (RLC)
Transistors (MOSFET, CMOS, etc.)
Digital logic gates
Semiconductor Manufacturing
Computer architecture
UNIX or Linux
Basic office software (Word, Excel, PowerPoint, etc)
Vi(m) editor
Programming Languages: Perl, C/C++, and Python
Scripting: awk, sed
Plotting: Origin
+ Tcl/TK
+ Matlab
Hspice (synopsys)
Virtuoso (cadence)
Verilog HDL
+ Sentaurus, Raphael, etc.
LaTex (prefer)
Word
+ 한글