Invention Grant
- Patent Title: Reducing impedance discontinuity in packages
- Patent Title (中): 减少封装中的阻抗不连续性
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Application No.: US13426892Application Date: 2012-03-22
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Publication No.: US08791372B2Publication Date: 2014-07-29
- Inventor: Paul M. Harvey , Douglas O. Powell , Wolfgang Sauter , Yaping Zhou
- Applicant: Paul M. Harvey , Douglas O. Powell , Wolfgang Sauter , Yaping Zhou
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Yudell Isidore Ng Russell PLLC
- Main IPC: H05K1/11
- IPC: H05K1/11

Abstract:
A device and/or apparatus having plated through holes (PTHs) which are coated to reduce impedance discontinuity in electronic packages. PTH vias are imbedded in the core of a printed circuit board comprising a core layer, a plurality of buildup layers, a plurality of micro-vias, and a plurality of traces. Traces electrically interconnect each of the micro-vias to PTH vias, forming an electrically conductive path. PTHs are coated with a magnetic metal material, such as nickel, to increase the internal and external conductance of the PTHs, thereby providing decreased impedance discontinuity of the signals in electronic packages.
Public/Granted literature
- US20130075148A1 Method and Apparatus to Reduce Impedance Discontinuity in Packages Public/Granted day:2013-03-28
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