Dell products l.p. (20250139347). COUPON AND METHOD FOR INTERNAL REGISTRATION FOR MAXIMIZING BACKDRILL-TO-METAL CLEARANCE
COUPON AND METHOD FOR INTERNAL REGISTRATION FOR MAXIMIZING BACKDRILL-TO-METAL CLEARANCE
Organization Name
Inventor(s)
Steven R. Ethridge of Austin TX US
Sandor Farkas of Round Rock TX US
Bhyrav M. Mutnury of Round Rock TX US
COUPON AND METHOD FOR INTERNAL REGISTRATION FOR MAXIMIZING BACKDRILL-TO-METAL CLEARANCE
This abstract first appeared for US patent application 20250139347 titled 'COUPON AND METHOD FOR INTERNAL REGISTRATION FOR MAXIMIZING BACKDRILL-TO-METAL CLEARANCE
Original Abstract Submitted
in one or more embodiments, a coupon with a plurality of cutouts based on a chirp waveform may be used to align a drilling machine to a pcb. light may be passed through the coupon and a camera may capture the light. a processor may perform zero padding, calculate a two-dimensional (2d) fast fourier transform (fft) of the image, multiply by a pre-calculated complex conjugate 2d fft of the coupon, then calculate a cross correlation based on an inverse 2d fft. embodiments may find the best fitting coordinates of the peaks and use the coordinate as a correction factor for referencing a drilling machine to ensure drills are centered and/or aligned relative to power plane pads or antipads.
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