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:
Aug. 23, 2016
Filed:
Nov. 15, 2013
Huawei Technologies Co., Ltd., Shenzhen, Guangdong, CN;
Shandang Liu, Shenzhen, CN;
Huawei Technologies Co., Ltd., Shenzhen, CN;
Abstract
The present invention relates to a method for drilling a printed circuit board, comprising: drilling down in an initial position, and when contacting a live superficial conductive layer of a PCB, acquiring a first conductive position and acquiring a first height difference between the initial position and the first conductive position; drilling onward after the first drill bit of the driller drills through the superficial conductive layer and when contacting another conductive layer of the PCB, acquiring a second conductive position and acquiring a second height difference between the initial position and the second conductive position; calculating a difference between the second and the first height difference to obtain a third height difference; and performing back-drilling, according to the third height difference, in a position that needs back-drilling. The present invention acquires precise depth information through a test blind via and reduces Stub length of back-drilling.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile