I. Environment Analysis
Introduction
Lately, South Korea's cosmetic companies are actively entering Japanese market. In particular, low-priced brand companies entering are remarkable. Continuing the long-term recession, Japanese consumers find inexpensive cosmetics. Through this period, cosmetics of South Korea draw popular through low price and good quality. Celebrity publicity is also inf
Item writing and moderation
-Writing items
There are always possibilities that text takers might misinterpret the items, so it is important for item writers to scrutinize the items from test takers' point of view. Also, items are required to be consistent with the specifications from start to end. After writing items, moderation will be followed to find weaknesses in the items and revise them
Making the Wafer
The process
-A seed crystal is suspended in a molten bath of silicon
-It is slowly pulled up and grows into an ingot of silicon
-The ingot is removed and ground down to diameter
-The end is cut off, then thin silicon wafers are sawn off (sliced) and polished
Epitaxy
The growth of an ultra-pure layer of crystalline silicon
Approx 3% of wafer thickness
Contaminant-free