Abstract:
A continuous variable valve duration apparatus may vary an opening duration of a valve. The continuous variable valve duration apparatus may include a camshaft in which a camshaft slot is formed, a cam portion of which a cam and a cam slot are formed thereto and of which a rotation center is identical to a rotation center of the camshaft and the cam portion of which a phase angle to the cam shaft is variable, and a duration control portion which varies the phase angle between the camshaft slot and the cam slot.
Abstract:
Overlapping dummy patterns for a semiconductor device are disclosed. According to an embodiment, a first dummy pattern is formed on a substrate; a second dummy pattern is formed to be overlapped with the first dummy pattern; and a third dummy pattern is formed to provide an electrical connection between the first dummy pattern and the second dummy pattern.
Abstract:
A control clock generating unit outputs a clock as a control clock when a column address strobe pulse is input and fixes the control clock to a specific level when an all bank precharge signal or a refresh signal is enabled. An internal pulse generating unit outputs an external write pulse or an external read pulse as an internal write pulse or an internal read pulse in response to the control clock.
Abstract:
A method for designing a mask is disclosed. A chip region can be defined and reduced to form a parent dummy pattern. A mesh dummy pattern can be formed, and portions where the parent dummy pattern and the mesh dummy pattern overlap each other can be removed to form offspring dummy patterns.
Abstract:
Provided are a mask layout method and a semiconductor device and a method for fabricating the same. The semiconductor device can include a main pattern, a first dummy pattern, and a second dummy pattern. The main pattern can be disposed on a substrate. The first dummy pattern and the second dummy pattern can be disposed around a side of the main pattern. The first dummy pattern can have an inner open region. The second dummy pattern can be disposed on the inner open region of the first dummy pattern, such that the first dummy pattern surrounds the second dummy pattern.
Abstract:
A mask layout method, semiconductor device and method for fabricating the same using a mask created according to the subject mask layout method are provided. The semiconductor device can include a microlens main pattern on a substrate and a microlens dummy pattern at a side of the microlens main pattern. The microlens dummy pattern can be formed in plurality using a mask created by the subject mask layout method. According to an embodiment of the subject mask layout method, a microlens dummy pattern can be created by forming a base dummy pattern and removing edge areas from the base dummy pattern. The microlens dummy pattern can be created to have a substantially circular shape. In one embodiment, the substantially circular shape can be an octagon.