Browse Prior Art Database

Process for Transparent EMC Window

IP.com Disclosure Number: IPCOM000107930D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 38K

Publishing Venue

IBM

Related People

Gallagher, RM: AUTHOR

Abstract

Disclosed is a multi-step process for producing a transparent EMC shielding window, capable of being grounded to another conductive surface. In step 1, a plastic sheet is extruded through a slot die and press polished by a set of heated rollers. A pressure- sensitive adhesive is laminated in-line onto one side of the sheet. A release liner protects the adhesive. The sheet is cut to the specified length. In step 2, a transparent film is laminated to a pressure-sensitive adhesive. A conductive wire screen in laminated to the adhesive without causing full penetration of the adhesive through the openings in the screen. The width of the screen is greater than the sheet width described in step 1.

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Process for Transparent EMC Window

      Disclosed is a multi-step process for producing a transparent
EMC shielding window, capable of being grounded to another conductive
surface.  In step 1, a plastic sheet is extruded through a slot die
and press polished by a set of heated rollers.  A pressure- sensitive
adhesive is laminated in-line onto one side of the sheet.  A release
liner protects the adhesive.  The sheet is cut to the specified
length.  In step 2, a transparent film is laminated to a
pressure-sensitive adhesive.  A conductive wire screen in laminated
to the adhesive without causing full penetration of the adhesive
through the openings in the screen.  The width of the screen is
greater than the sheet width described in step 1.  In step 3, the
adhesive side of the sheet from step 1 is laminated to the screen
side of the lamination described in step 2 to provide a transparent
window.  The lamination provides an overlap of the screen on all
sides of the sheet.  The overlap area provides the contact area
between the screen and another conductive surface.  The corners of
the screen laminate can be trimmed and folded back on itself to
provide a conductive path with a mating surface.

      In an alternate approach, a glass sheet could be substituted
for the extruded plastic sheet described in step 1.  Steps 2 and 3
would remain the same.

      Disclosed anonymously.