The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2016
Filed:
Jun. 13, 2014
Oracle International Corporation, Redwood City, CA (US);
Stephanie Moran, San Francisco, CA (US);
Michael C Freda, Morgan Hill, CA (US);
Karl Sauter, Pleasanton, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A step drill test structure for a PCB and method for using the same is disclosed. In one embodiment, a test structure includes a drill path and a connection via. The drill path may include sensing pads on selected ones of a plurality of layers of the PCB (e.g., the non-surface layers). The sensing pads of a given drill path may be electrically conductive, while the remaining portion of the drill path is non-conductive. The sensing pads of each drill path may be electrically coupled to the connection via. The depth of a given layer at a particular drill path may be determined by drilling, using an electrically conductive drill bit, into the drill path and determining when an electrical connection is made between the drill bit and the connection via.