Serviceable conformal EM shield

• US 8,716,606 B2
• Filed: 10/14/2010
• Issued: 05/06/2014
• Est. Priority Date: 10/14/2009
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Kelley, Matthew, Adams, Christian, Nelson, Patrick A.
• Primary Examiner(s): NGO, HUNG V
• Application Number:
  US12/904,854
• Publication Number:
  US 20110120764A1
• Time in Patent Office: 1,300 Days
• Field of Search: 257/659, 174/382, 174/384, 174/386, 361/818
• US Class Current: 174/382
• CPC Class Codes: G06F 21/73 by creating or determining hardware identification, e.g. serial numbers
• CPC Class Codes: H01L 23/57 Protection from inspection, reverse engineering or tampering
• CPC Class Codes: H01L 23/573 using passive means
• CPC Class Codes: H01L 23/576 using active circuits
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2924/09701 Low temperature co-fired ceramic [LTCC]
• CPC Class Codes: H01L 2924/3011 Impedance
• CPC Class Codes: H05K 1/0275 Security details, e.g. tampering prevention or detection
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence
• CPC Class Codes: Y10T 29/49227 Insulator making

Abstract

A conformal electro-magnetic (EM) shield and a method of applying such a shield are provided herein as well as variations thereof. Variations include, but are not limited to, frequency-selective shielding, shields containing active and/or passive electronic components, and strippable shields that can easily be applied to and removed from underlying components. Variations of a shield structure include at least an insulating layer between the underling component and the shield, and shielding and/or capping layers disposed over the insulating layer.

Claims

1. A conformal electromagnetic (EM) shield used for shielding a component, the shield comprising:

a conformal electrically insulating layer disposed over at least part of the component;

a first conformal electrically conductive layer disposed over said electrically insulating layer; and

a second conformal electrically conductive layer disposed on top of the first conformal electrically conductive layer;

wherein said insulating layer is configured as a strippable layer having a level of adhesion to the component such that the insulating layer peels away from the component and

wherein said electrically conductive layer is configured to remain attached to the electrically insulating layer.

2. The shield of claim 1, where said component is an electronic component.

3. The shield of claim 1, said shield including an intervening dielectric layer disposed between said first conformal electrically conductive layer and said second second conformal electrically conductive layer.

4. The shield of claim 1, said first conformal electrically conductive layer including at least one of a wire mesh, plated conduction paths, printed conduction paths, and electronic components.

5. The shield of claim 1, where said first conformal electrically conductive layer is connected to grounded access points or backshells of connectors on said component.

6. The shield of claim 3, where the intervening dielectric layer compensates for shear stresses caused by CTE mismatch.

7. The shield of claim 1, said shield including a capping layer disposed on top of said second conformal electrically conductive layer, where the capping layer provides at least one of mechanical rigidity, corrosion resistance, waterproofing, and temperature control.

8. The shield of claim 7, where said capping layer is EPDM rubber.

9. The shield of claim 7 said capping layer including parylene.

10. The shield of claim 1, where said electrically insulating layer is an elastomeric layer.

11. The shield of claim 1, where said first conformal electrically conductive layer is a ground plane.

12. The shield of claim 1, where said second conformal electrically conductive layer includes at least one of:

two or more printed antennas; and

an impedance matching network.

13. The shield of claim 1, where the level of adhesion between the insulating layer and the component is determined based on surface treatment of the component, said surface treatment being carried out before the insulating layer is disposed over said component.

14. A conformal electromagnetic (EM) shield used for shielding a component, the shield comprising:

a conformal electrically insulating layer disposed over at least part of the component;

a conformal electrically conductive layer disposed over said electrically insulating layer, and

wherein said insulating layer is configured as a strippable layer that peels away from the component;

wherein said electrically conductive layer is configured to remain attached to the electrically insulating layer; and

where said electrically conductive layer includes electronic components that detect a presence and intensity of electromagnetic interference.

15. The shield of claim 14, where said electronic components generate a control signal when a detected electromagnetic interference exceeds a certain threshold.

16. The shield of claim 15, where the control signal alters or de-activates operation of one or more portions of said component.

17. A conformal electromagnetic (EM) shield used for shielding a component, the shield comprising:

a conformal electrically insulating layer disposed over at least part of the component;

a conformal electrically conductive layer disposed over said electrically insulating layer; and

wherein said insulating layer is configured as a strippable layer that peels away from the component;

wherein said electrically conductive layer is configured to remain attached to the electrically insulating layer, and

where the electrically conductive layer includes one or more EM responsive inks or dyes, where at least one of said one or more EM responsive inks or dyes changes a spectral response after exposure at or above a threshold EM radiation level.