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J-Shaped Post for Mounting or Attaching Devices to a Board

IP.com Disclosure Number: IPCOM000010251D
Publication Date: 2002-Nov-13
Document File: 2 page(s) / 94K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that uses J-shaped posts to attach a device to a circuit board. Benefits include ensuring a desired down force, while eliminating welding process.

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J-Shaped Post for Mounting or Attaching Devices to a Board

Disclosed is a method that uses J-shaped posts to attach a device to a circuit board. Benefits include ensuring a desired down force, while eliminating welding process.

Background

Current solution uses columns through the board and welded.  The column is straight (i.e. does not have any mechanical means of adding strength) at the weld junction. The process retains the device with limited pull out resistance.

General Description

In the disclosed method, the J-Shaped posts are attached using two holes in the motherboard; this requires no welding, and allows the J-Shaped posts to be changed or replaced easily. Also, the J-Shaped posts eliminate pull out during use.  

The J-Shaped posts can be attached to the device by bending the ends of the columns protruding above the device.  Speed nuts (stamped metal pieces) can be applied to keep the J- shaped columns ends retained in place of bending.  See Fig 1.

Advantages

The following are advantages of the disclosed method:

·        Minimizes the board space used for attachment, and uses the 1.0 mm diameter holes currently present on the board.

·        Down force on the device can be increased through the improved retention.

·        Eliminates the need to weld, which reduces the rework complexity associated with welded columns.

·        Reduce cost by eliminating the need for additional hardware on the backside of the PCB.

Fig. 1 Example of J-Post using bending process to retain a thermal solution....