A flex circuit cable passing through the hinge between a printed circuit board and the laptop display needed a cost-effective shield wrap or tape. Without shielding, the cable functioned like an antenna.
Customer Challenge
In a sleek laptop design, a flex circuit cable wound its way through the hinge, connecting the printed circuit board to the display. This cable was crucial for the device’s functionality, but there was an unexpected issue—the cable, without any form of shielding, started behaving like an antenna. Instead of simply transmitting signals as intended, it began picking up interference from surrounding electronics, creating a potential EMI problem.
The solution was simple yet essential: an economical shield wrap or tape was needed to block the unwanted electromagnetic waves. By adding this shield, the cable could stop acting like an antenna and ensure smooth, uninterrupted operation for the laptop, without compromising its slim design.
Design Requirements
- Highly flexible
- 5200 VDC dielectric strength
- Cost-effective with straightforward installation
- Simple verification of correct installation
Key Customer Requirements
- Offered in rolls or custom cut to length
- No mechanical hardware needed for installation
- Superior EMI shielding
- Leverages Parker Chomerics’ expertise in foil and film technology
- Oversized polyester release film enables fast, easy installation
- More cost-effective than conductive coatings or other flat cable shielding options
Solution
Leveraging existing materials and technology, Parker Chomerics integrated a non-conductive adhesive onto a 3 mil dielectric PVC strip, which was then bonded to aluminum foil coated with an electrically conductive pressure-sensitive adhesive (PSA), featuring an oversized release liner on the PVC side.
Results
A straightforward solution addressed a significant issue. Parker Chomerics can help you develop solutions for your shielding challenges. Frequently, combining existing materials and technologies in various ways provides a convenient and cost-effective option. Connect with an expert applications engineer to discuss your project today.