US Patent Issued to Sandisk Technologies on April 14 for "Determining a back drilling depth for a printed circuit board using a printed circuit board test coupon" (California Inventor)

ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,779, issued on April 14, was assigned to Sandisk Technologies Inc. (Milpitas, Calif.).

"Determining a back drilling depth for a printed circuit board using a printed circuit board test coupon" was invented by John Patrick Burke (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A PCB test coupon is used to determine a back drilling depth to remove a stub from a PCB. A number of conductors are placed at various layers within the PCB test coupon. Vias connect each end of a conductor to a surface layer of the PCB test coupon and form test points on the surface layer of the PCB test coupon. To determine a depth of each conductor, an induc...