Browse Prior Art Database

AUTOMATED MANUFACTURING RF-SHIELDING AND SEALING

IP.com Disclosure Number: IPCOM000007726D
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2002-Apr-17
Document File: 2 page(s) / 63K

Publishing Venue

Motorola

Related People

Werner Zuber: AUTHOR

Abstract

In all communication equipment it is necessary to have RF-areas shielded. It is standard practice to have a separate shield for each size of chassis or part of chassis. These shields are mostly made of spring steel to give good contact to the ground plane, or it is a cover with very tight tolerances to lit exact to the chassis.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 86% of the total text.

Page 1 of 2

MOlVROLA Technical Developments

AUTOMATED MANUFACTURING RF-SHIELDING AND SEALING

by Werner Zuber

  In all communication equipment it is necessary to have RF-areas shielded. It is standard practice to have a separate shield for each size of chassis or part of chassis. These shields are mostly made of spring steel to give good contact to the ground plane, or it is a cover with very tight tolerances to lit exact to the chassis.

  Another subject to solve shielding problems is the metallisation of plastic housings. This has the disadvantage of not allowing the separation of raw material for clean recycling and will be forbidden in future according to DFE rules.

  The idea to solve this problem is to have a spe- cial designed chassis, a metal foil (for instance Al) and a tool where at the end of mounting on the line (before the electronic is fitted into a housing) the

foil will be punched out and pressed into the slots of the chassis in one step. The advantages of this idea are as follows:

-No outside tools -No ordering of parts -No stock for all different parts -No costs for handling and time -One size of roll with foil -Automated covering-Time saving -One or more areas can be covered in one step -Sealing for warranty against opening by non authorized people
-Easy separation for material recycling

The sketches Fig. 1 And Fig. 2 show the idea in detail:

e Motorola. Inc. 1996 190 May 1996

[This page contains 14 pictures or other non-text objects]

Page 2 of 2

MO7VROLA Technic...