Abstract:
게르마늄층을이용한그래핀제조방법이개시된다. 개시된게르마늄층을이용한그래핀제조방법은, 기판상에게르마늄층을형성하는단계와, 상기기판이배치된챔버내에탄소함유개스를공급하여상기게르마늄층상에직접그래핀을형성하는단계를포함할수 있다. 본발명의실시예에따른그래핀제조방법은촉매금속층을사용하지않으므로, 촉매금속으로오염되지않은그래핀층을제조할수 있다.
Abstract:
A refrigerator includes: a storage chamber; an inner door which has an opening of a size corresponding to the size of the storage chamber; a plurality of door guards arranged on the opening; and an outer door which opens or closes the opening. The inner door includes an inner wall which is formed to be flat from the inlet of opening to the outlet of the opening.
Abstract:
A mobile device including a hard disk drive performing changeable track seek profile and a method of operating the same are provided to change a maximum value of track seek current and a sliding mode section of the hard disk drive based on external and internal power supplies for reducing power consumption. A mobile device(100) comprises a host(115), and a hard disk drive(120). The host checks whether an external power supply(105) is used and generates a command based on the checking result. The hard disk drive generates track seek current having current profile in which a maximum value and a sliding mode section in response to the command. The hard disk drive includes a controller, a VCM driver, and an actuator. The controller generates the track seek current of first current profile having a first maximum value and a first sliding mode section when the hard disk drive uses an internal power supply(110), and generates the track seek current of second current profile having a second maximum value and a second sliding mode section when the hard disk drive uses the external power supply.