PATENT CLAIM ANALYSIS

Application Number: 15880374
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["250", "39600R"]

Abstract:
In a charged-particle multi-beam writing method a desired pattern is written on a target using a beam of energetic electrically charged particles, by imaging apertures of a pattern definition device onto the target, as a pattern image which is moved over the target. Thus, exposure stripes are formed which cover the region to be exposed in sequential exposures, and the exposure stripes are mutually overlapping, such that each area of said region is exposed by at least two different areas of the pattern image at different transversal offsets (Y 1 ). For each pixel, a corrected dose amount is calculated by dividing the value of the nominal dose amount by a correction factor (q), wherein the same correction factor (q) is used with pixels located at positions which differ only by said transversal offsets (Y 1 ) of overlapping stripes.

Claim (Index 9):
The method of  claim 1 , including computing an exposure pattern suitable for exposing the desired pattern on a target using said pattern definition device for writing said desired pattern by exposing a multitude of pixels within said region on the target, wherein during exposing the desired pattern on a target:\n in said pattern definition device said plurality of blanking apertures is arranged in a predetermined arrangement defining mutual positions of the blanking apertures, each blanking aperture being selectively adjustable with regard to a dose value to be exposed through the respective blanking aperture onto a corresponding aperture image on the target during a respective exposure interval, said dose value taking a respective value in accordance with a discrete palette, said discrete palette including a number of gray values forming a scale ranging from a minimum value to a maximum value, during a writing process of said desired pattern, a sequence of exposure intervals is made, wherein in each exposure interval the blanking apertures are imaged onto the target, thus generating a corresponding plurality of aperture images, wherein the position of aperture images is kept fixed relative to the target at the position of a pixel during an exposure interval, but between exposure intervals the position of aperture images is shifted over the target, thus exposing the multitude of pixels on the target, and the aperture images are mutually overlapping on the target, and the aperture images have a nominal width which is greater than the distance between pixel positions of neighboring aperture images on the target, by an oversampling factor greater than one, wherein computing the exposure pattern comprises:\n determining the discrete palette, \n providing the desired pattern and calculating a nominal exposure pattern as a raster graphics defined on the multitude of pixel elements, said nominal exposure pattern being suitable to create a nominal dose distribution on the target realizing contour lines of the desired pattern and including for each pixel element a respective nominal dose value, and \n determining, for each pixel element, a discrete value which approximates the nominal dose value of the respective pixel element, said discrete value being selected from the discrete palette, \n wherein determining the discrete values includes employing ordered dithering using a dither matrix of a predefined size.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 86.0
- Lexical Diversity: 1.81395
- Patent Class: 250.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14795547', '14795535', '14726243', '14631690', '15073200']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7873178589847857
- 35 USC 102 Novelty (BERT): 0.5400730669426964
- Combined Prediction Score: 0.7625933797805768
- Mean Citation Score: 375.153118
- Max Citation Score: 393.4646
- Similarity Product: 360.8534486481905

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test