Enamel
√ Hard and white substance covering the teeth
√ The hardest and most highly mineralized
√ Protects the fragile underlying parts of the teeth
√ Covers the crown and supported by dentin
Component of enamel
√ 96% of enamel : mineral, water, organic material
√ contain two unique classes of proteins amelogenins and enamelins
√ The basic unit of enamel is called
CRT
* Large viewing angle
* High color contrast level
* Better resolution with moving
images
BUT!
Nowadays,
Portability & mobility is
important!!
CRT is too HEAVY to carry on +
Consumes more energy
LCD
* Narrow viewing angle
* Long response time
* Limited brightness
(because it use Backlight)
PDP
* Low luminous efficiency
So, We nee
adhesion between photo-resist and silicon wafer. The smaller the pattern size is, the slimmer the thickness of resist coating on silicon wafer is. As a results, because of bad contact, photo-resist can be strip from silicon wafer after patterning(strip phenomenon). To improve this problem, there is resists that polyoxyethylene or polysiloxane is main chain of polymer. Synthesized resist like this
4. Equipment
4.1 RCA cleaning
RCA cleaning is a series of rinsing procedure prior to experiment with Si wafer. The purpose of the RCA clean is to remove organic contaminants (such as dust particles, grease or silica gel) from the wafer surface. There are three steps to be performed. The first step is to remove organic contaminant from surface of wafer. Second step is to remove any oxide layer
structure and culture. First, the vice president of CJ, Son Gyeong-sik, is a person who always supports workers. His leadership style may be compared to iron hand in a velvet glove. This kind of leadership style played a role in making internal cohesion. For example, although he does not order his employees directly, he has the power to make employees work on their own for the purpose of setting