Browse Prior Art Database

Cross Point Switch Package

IP.com Disclosure Number: IPCOM000073722D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Uberbacher, EC: AUTHOR

Abstract

Effective high density packaging is provided for small cross-point switches 10 by an "eggcrate" conductor construction 12. Referring to Drawing A, the walls 11 of the eggcrate 12 provide the X and Y circuit paths to all four switches 10. The Z circuit paths to the transistor switch are provided through the circuit board contact 14. The spring material contact elements 16 built into the eggcrate walls 11 are coated with a resist which prevents plastic from attaching to these gold plated contact surfaces when the eggcrate walls are plastic coated. The walls are interlocked via the slits 18 and openings 20 as shown in Drawing B. Each wall 11 is isolated from the interconnecting walls because of the plastic insulation coating 22. Thus, we essentially have bus bars extending in an X and Y direction.

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Cross Point Switch Package

Effective high density packaging is provided for small cross-point switches 10 by an "eggcrate" conductor construction 12. Referring to Drawing A, the walls 11 of the eggcrate 12 provide the X and Y circuit paths to all four switches 10. The Z circuit paths to the transistor switch are provided through the circuit board contact 14. The spring material contact elements 16 built into the eggcrate walls 11 are coated with a resist which prevents plastic from attaching to these gold plated contact surfaces when the eggcrate walls are plastic coated. The walls are interlocked via the slits 18 and openings 20 as shown in Drawing B. Each wall 11 is isolated from the interconnecting walls because of the plastic insulation coating 22. Thus, we essentially have bus bars extending in an X and Y direction. The transistor or switch 10 is shown in more detail in Drawing C. The transistor module pins 26 connect to the contact system contact tabs 27 which have been molded into a frame 28. A contact failure, which is the key concern in cross-point switches, only effects the related switch and not a string of switches.

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