Computer Manufacturer Requires EMI Shielding of Expansion Ports for Future Upgrades

THE CHALLENGE
A desktop computer features a series of expansion ports designed for future consumer upgrades. These ports need to be covered for both mechanical and EMI protection. Snap-in plastic covers covered provided decorative and mechanical protection, but lacked the necessary EMI shielding. A low cost EMI shielding solution was needed.

DESIGN REQUIREMENTS
40 dB reduction in EMI emissions
Reliable electrical ground to chassis
Removability in the field
Low-cost, easy installation

KEY CUSTOMER REQUIREMENTS
Kiss-cut resealable dielectric laminate exposing conductive PSA for 360-degree peripheral grounding
Pull tabs for fast removal of resealable dielectric film
No mechanical hardware required for installation
Low cost, short lead time
Excellent EMI shielding

CONCLUSION
The Parker Chomerics CHO-PATCH solution featured resealable dielectric EMI shielding which provided a low-cost alternative to fastener-mounted metal plates and plastic covers. This material is available in both bulk rolls or in custom designed configurations.

THE SOLUTION

Parker Chomerics custom designed a foil/film CHO-PATCH shield from Chomerics’ new resealable dielectric EMI shielding laminate. The shield features a resealable pressure sensitive adhesive (PSA) liner so that the foil can be easily bonded to the chassis.

It is a low cost solution that is ideal for customers looking for lightweight, reliable EMI shielding without the need for hardware for installation.