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. 30, 2017
Filed:
Jun. 02, 2015
Sarcina Technology Llc, Palo Alto, CA (US);
Longqiang Zu, Palo Alto, CA (US);
Li-Chang Hsiao, Miaoli County, TW;
SARCINA TECHNOLOGY LLC, Palo Alto, CA (US);
Abstract
A package design method is disclosed for the optimization of package differential impedance at data rates of 25 Gb/s and beyond. The method optimizes the differential impedance of package vertical interconnections of BGA ball, via, and PTH as well as around the joint between the vertical interconnection and the horizontal interconnection of trace. At 8 ps rise time, a <5% impedance variation is obtained with a 0.8 mm BGA ball pitch and a 10-layer buildup substrate and a <10% impedance variation is obtained with a 1 mm BGA ball pitch and a 14-layer buildup substrate. The method is applicable to all BGA package designs running at 25 Gb/s and beyond.