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Integral Curved Contact Fingers for Grounding a Conductive Coated Surface of a Plastic Panel

IP.com Disclosure Number: IPCOM000110704D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 70K

Publishing Venue

IBM

Related People

Barina, RM: AUTHOR [+4]

Abstract

Disclosed is a method for providing a conductive ground plane along the surface of a thermoplastic panel, held within an aperture of a metal retainer plate with a curved section. Such a ground plane is typically useful in reducing the emission of electromagnetic energy from a computing system at radio frequency levels, which might otherwise interfere with the operation of adjacent equipment.

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Integral Curved Contact Fingers for Grounding a Conductive Coated Surface of a Plastic Panel

      Disclosed is a method for providing a conductive ground plane
along the surface of a thermoplastic panel, held within an aperture
of a metal retainer plate with a curved section.  Such a ground plane
is typically useful in reducing the emission of electromagnetic
energy from a computing system at radio frequency levels, which might
otherwise interfere with the operation of adjacent equipment.

      In the example of the figure, a thermoplastic panel 1 is
mounted within an aperture 2 of a stamped and formed metal retainer
plate 3, to be held in place by means not shown.  Panel 1 serves as
a system control panel bezel, with an exterior surface 4 providing
part of the outer surface of a computing system.  Retainer plate 3,
which includes a curved section 5, extending adjacent to aperture 2,
is electrically grounded to the system frame by means not shown.

      After panel 3 is formed by a thermoplastic molding process, an
interior surface 6 of this panel is coated with a conductive
material, such as copper paint.  Panel 1 is provided with a number of
fingers 7, molded as integral parts thereof, which individually
descend to wrap around curved section 5 when panel 1 is assembled to
retainer plate 3.  The surfaces of fingers 7 which contact curved
section 5 include conductive coatings which are electrically
continuous with that of interior surface 6.

      L...