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:
Jun. 21, 2005
Filed:
Aug. 23, 2002
Darrin J. Haug, Bellingham, MA (US);
Brandon Barney, Hudson, MA (US);
Darrin J. Haug, Bellingham, MA (US);
Brandon Barney, Hudson, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A circuit board has a first signal layer having a set of conductors, a second signal layer having a conductive plane and a non-conductive region, and a third signal layer having a conductive region that mirrors the non-conductive region of the second signal layer. The circuit board further includes a first separating layer having non-conductive material which is disposed between the first signal layer and the second signal layer, and a second separating layer having non-conductive material which is disposed between the second signal layer and the third signal layer. Accordingly, traces within the first signal layer and overlying the conductive plane of the second signal layer will have a first impedance, while traces within the first signal layer and overlying the non-conductive region of the second signal layer and the conductive region of the third signal layer will have a second impedance that is different than the first impedance.