Abstract:
The invention is directed to a method for adjusting sizes and shapes of plug openings for border plug openings overlapping with trenches respectively, wherein the border plug openings are separated from each other with a distance equal to or smaller than a specific distance. The method comprises performing an adjusting process for separating the border plug openings away from each other and enlarging the dimensions of the border plug openings so that the border plug openings are located within the trenches respectively and the edges of the borer openings are separated from the sidewalks of the trenches, wherein the border plug openings are enlarged within ranges of the trenches respectively.
Abstract:
A customer illumination aperture (CIA) structure for lithographic exposure is disclosed, including a central part and at least one off-axis part around the central part. The off-axis part of the CIA is disposed in a symmetric manner with respect to the central part.
Abstract:
A training method of a digital-analog converter is provided. The digital-analog converter comprises a plurality of parallel capacitors, each of which is floatingly coupled to a plurality of correcting capacitors. Two voltages outputted from the digital-analog converter are received and compared. When a latter output voltage is lower than or equal to a former output voltage, the correcting capacitor is used to correct the capacitor corresponding to the latter output voltage until the latter output voltage is higher than the former output voltage. When the latter output voltage is higher than the former output voltage, a new voltage is outputted from the digital-analog convert and compared with the latter output voltage. The steps of comparing and correcting are repeated until every latter output voltage is higher than every former output voltage.
Abstract:
A drive device for a sunshade curtain includes a housing with a cover attached thereto, a motor received in the housing with a driving shaft extending through the cover, a driver attached to the free end of the driving shaft, and a pair of switches movably attached to the cover at opposite sides of the driver. The switches have a pair of idlers respectively in contact with the driver at opposite sides of the driver. When a rope for opening or closing the sunshade curtain is received between the driver and the idlers, and when the drive device is turned on to drive the driver, the rotating driver draws the rope to move along the rotation direction thereof through friction. Thus, the sunshade curtain is opened or closed automatically by the drive device through controlling the rotation of the motor.
Abstract:
The present invention provides a photomask comprising a substrate and a plurality of shielding patterns. The substrate comprising a plurality of shielding regions and a plurality of transparent regions, while each transparent region is disposed between two adjacent shielding regions and has one depression. The depression and the shielding region share a same edge and a sidewall of the depression is aligned with a sidewall of the shielding pattern.
Abstract:
In a method of optical proximity correction, a main pattern is provided. The main pattern has a critical dimension. When the critical dimension is reduced to reach or fall below a first reference value, a serif/hammerhead is added onto the main pattern. When the critical dimension is further reduced to a second reference value or below, an assist feature is added onto the main pattern. The corrected pattern is then transferred to a layer on the wafer with an improved fidelity.
Abstract:
An optical proximity correction method. Assist features, such as scattering bars, are added to a main pattern to be transferred. Calculations are performed on the entire two-dimensional original pattern using model-based optical proximity correction. A series of features are added according to the specific reference indexes of the coordinate system. The original pattern is altered to form a corrected pattern. The process of calculation and correction, however, does not include the scattering bars.
Abstract:
A loudspeaker system includes at least two loudspeaker units. Each loudspeaker unit includes at least one loudspeaker mechanism mounted on a loudspeaker enclosure. The loudspeaker enclosure includes an outer cabinet body having an open front side, a closed rear side, opposed lateral walls, and opposed top and bottom walls, and an inner baffle frame disposed in the cabinet body. The baffle frame has parallel left and right walls that form a sound space in the baffle frame. The left and right walls further form first clearances with the lateral walls respectively, and have a front portion with the loudspeaker mechanism mounted thereon. The front portion cooperates with the lateral walls to form a pair of acoustic port openings at front ends of the first clearances. The left and right walls further have a rear portion that forms a second clearance with the rear side. The second clearance is communicated with and extends between rear ends of the first clearances. The baffle frame further has a ducting member at the rear portion. The ducting member forms an acoustic path that communicates the sound space and the second clearance such that sound pressure behind the loudspeaker mechanism can be radiated through the acoustic port openings via the sound space, the acoustic path, the second clearance and the first clearances.
Abstract:
A method of optical proximity correction suitable for use in a mixed mode photomask. An original pattern is to be -transferred from the mixed mode photomask. A binary mask curve and a phase shift mask curve reflecting relationship between critical dimensions of the photomask and the original pattern are obtained. A critical value of the critical dimension is selected. For the binary mask curve, the portion with the critical dimension of the original pattern larger than the critical value is selected. In contrast, for the phase shift mask curve, the portion with the critical dimension of the original pattern smaller than the critical value is selected. These two portions are combined as an optical characteristic curve. The mixed mode photomask can thus be fabricated according to the optical characteristic curve.
Abstract:
A method of optical proximity correction suitable for use in a mixed mode photomask. An original pattern is to be transferred from the mixed mode photomask. A binary mask curve and a phase shift mask curve reflecting relationship between critical dimensions of the photomask and the original pattern are obtained. A critical value of the critical dimension is selected. For the binary mask curve, the portion with the critical dimension of the original pattern larger than the critical value is selected. In contrast, for the phase shift mask curve, the portion with the critical dimension of the original pattern smaller than the critical value is selected. These two portions are combined as an optical characteristic curve. The mixed mode photomask can thus be fabricated according to the optical characteristic curve.