Browse Prior Art Database

Efficient Packaging of High-Speed Cable Interconnects

IP.com Disclosure Number: IPCOM000033812D
Publication Date: 2004-Dec-28
Document File: 3 page(s) / 40K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that uses a high-speed connector, a flex or rigid-flex cable interface board, and high-speed cabling to create an assembly that reduces the amount of target board area and enables more efficient packaging.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Efficient Packaging of High-Speed Cable Interconnects

Disclosed is a method that uses a high-speed connector, a flex or rigid-flex cable interface board, and high-speed cabling to create an assembly that reduces the amount of target board area and enables more efficient packaging.

Background

Today, when high-speed cables are terminated to a cable interface board, only one cable is terminated to the board (see Figure 1 and 2). Moreover, the connectors on these types of assemblies are usually double-row, surface-mounted connectors of the “mating-type”, where half of the mating connector interface resides on the “target” board, while the other half resides on the cable interface assembly (see Figure 2).

Since sometimes the connectors are double-row, the single row of the cable signal termination is translated to either under-used pins on the connector (if the connector SMT lead pitches are the same as the cable), or a connector which has twice the SMT lead pitch as the cable signal wire pitch. In either case, the number of cable signal I/Os supported in a given X-Y area on the target bd is inefficient.

General Description

In the disclosed method, the cable interface board is made of mechanically flexible material to form a flex or rigid-flex construction. These cable interface boards have solder termination structures etched on them so that high-speed cabling can be soldered onto them. For a high-speed, coax-type cable, the typical solder terminations are configured so that one row of etched pads are for soldering the individual signal wires from the cable to the cable interface board. The second “row” of etched pads parallel to the first row is used to terminate the shields from the individual coax wires (see Figure 3).  These cable solder terminat...