Multilayer Tape with Embossed Surface for EMI Shielding and Tamper Evidence
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Solution Overview
Problem
Electronic devices, particularly disk drives, face issues with electromagnetic interference (EMI) leakage and tampering, as they become smaller and more sensitive, leading to device failures and potential false warranty claims due to increased sensitivity to EMI and the need for secure protection against unauthorized access.
Innovation Solution
A multilayer tape with an embossed surface, an electrically conductive material layer, and a conductive adhesive layer is applied over the seams of electronic device enclosures, providing EMI shielding and evidence of tampering by creating a continuous electrical connection and visible pattern disruption upon attempted opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EMI shielding tape is applied to prevent electromagnetic interference, then device reliability is improved, but the tape structure becomes more complex
Solution Approach 1:
The patent combines EMI shielding functionality with tamper detection functionality into a single integrated tape structure. The conductive layer provides both EMI shielding and tamper evidence through embossed surface disruption, eliminating the need for separate shielding tapes and tamper detection devices.
Solution Approach 2:
The tape structure is designed to perform multiple functions simultaneously: EMI shielding through the conductive layer, tamper detection through the embossed surface pattern disruption, and structural bonding through the adhesive layer. This multi-functional design resolves the contradiction by achieving enhanced reliability without proportionally increasing complexity.
2Reliability
If tamper detection tape with hologram or diffraction grating is used, then evidence of tampering is improved, but EMI shielding capability is insufficient
Solution Approach 1:
The patent merges the tamper detection mechanism (embossed surface with disrupted pattern) with the EMI shielding mechanism (conductive layer) into a single integrated structure. The conductive layer is positioned to disrupt the embossed surface pattern upon tampering while simultaneously providing continuous EMI shielding coverage.
Solution Approach 2:
The tape employs a composite structure combining adhesive material, conductive material layer, and embossed substrate. This composite design enables the tape to simultaneously provide tamper detection through pattern disruption and EMI shielding through the conductive properties, overcoming the limitations of single-function tapes.
3Object-affected harmful factors
If conductive layer is added to provide EMI shielding, then EMI protection is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses a thin flexible conductive layer that can be easily deposited onto the embossed substrate using conventional coating or lamination techniques. This thin film approach to EMI shielding maintains manufacturing simplicity while providing effective electromagnetic protection, avoiding the need for complex rigid shielding structures.
Solution Approach 2:
The conductive layer is designed with specific thickness and material properties that optimize EMI shielding effectiveness while maintaining ease of manufacture. By carefully selecting the conductive material and layer thickness parameters, the patent achieves effective EMI protection without significantly increasing manufacturing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tape effectively reduces EMI leakage and prevents unauthorized access by maintaining electrical conductivity and visibility of tampering attempts, ensuring device integrity and reliability while preventing false warranty claims.
Implementation Method 1
Such tapes can be applied to seams, slots or gaps on the device to reduce EMI by creating a Faraday Cage around the electric components
Implementation Method 2
When attempts to open the enclosure occur, the structure of the tape is disrupted and the image or pattern on the tape shows evidence of the attempt
Data Source
AI summary
The present invention provides a multilayer tape for simultaneously providing shielding of electromagnetic interference (EMI) and evidence of tampering with an electronic device to which it is applied. The multilayer tape can be attached to an electronic device to cover a seam or other opening in the electronic device. An embossed surface provides evidence of the disruption of the tape, and the tape includes a conductive adhesive to provide EMI shielding. The multilayer tape is particularly useful for sealing the seams of a disk drive device.