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Browse Prior Art Database

VHDM Daughtercard Right Angle Receptacle Glass Master

IP.com Disclosure Number: IPCOM000022408D
Original Publication Date: 2004-Mar-12
Included in the Prior Art Database: 2004-Mar-12
Document File: 2 page(s) / 110K

Publishing Venue

IBM

Abstract

Disclosed is a tool used for ensuring correct wafer alignment for VHDM Daughtercard Right Angle Receptacle Connect. VHDM connectors have been used in the majority of IBM servers from 1998 to the present day and in many servers the VHDM connector functions as the interconnector nervous system of the computer. Thus, this tool (VHDM Daughtercard Right Receptacle Glass Master) improves the quality and mechanical functionality of this connector system.

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VHDM Daughtercard Right Angle Receptacle Glass Master

The VHDM Daughtercard Right Angle Receptacle Glass Master is a tool used for ensuring correct wafer alignment. The main reason for this tool is that incoming and after assembly VHDM Daughtercard Right Angle Receptacle connectors would have wafers that were out of misalignment to the point that they did not meet specification. These misaligned wafers would cause the following problems: bending signal pins on the mating connector, bending grounding shields on the mating connector, and plastic deformation to both mating and daughtercard connectors.

    The tool is made up of a metal frame and a stencil within a piece of glass. An example of this glassmaster is shown in Figure 1. Figure 1 shows two glass master, jeweler's glass, jeweler's glass case, and a plastic ring that attaches to the jeweler's glass.The metal frame engages the connector and properly aligns the stencil. The stencil within the glass has the correct boundary tolerances of the edges of the wafers. This stencil pattern is shown in Figure 2. If a wafer goes past the inside boundaries of the stencil, then the VHDM connector is out of specification.

    The other method to ensuring for correct wafer alignment in all axes is X and Y coordinate measuring system, which uses either optical and/or laser methods. The advantage of the VHDM Daughtercard Right Angle Receptacle Glass Master over the other systems is that it is cheaper, less apparatus, and easier to...