Ultra-low height electromagnetic shielding enclosure

• US 7,285,732 B2
• Filed: 07/28/2006
• Issued: 10/23/2007
• Est. Priority Date: 01/29/2004
• Status: Active Grant

• Current Assignee: Laird Technologies Incorporated (DuPont de Nemours, Inc.)
• Original Assignee: Laird Technologies Incorporated (DuPont de Nemours, Inc.)
• Inventors: Pirkhalo, Vladislav, Vinokor, Igor, English, Gerald, Favela, Zoilo Anthony, Smyk, Eugene, Shlahtichman, Anatoliy
• Primary Examiner(s): Ngo; Hung V.
• Application Number:
  US11/495,995
• Publication Number:
  US 20070012479A1
• Time in Patent Office: 452 Days
• Field of Search: 174/377, 174/382, 174/384, 174/387, 361/816, 361/818
• US Class Current: 174/382
• CPC Class Codes: H05K 9/0032 having multiple parts, e.g. frames mating with lids
• CPC Class Codes: H05K 9/0039 Galvanic coupling of ground layer on printed circuit board [PCB] to conductive casing printed shielding conductors, ground planes or power planes for reduction of cross-talk or noise in printed circuits H05K1/0218

Abstract

The electromagnetic shielding device includes a frame and a lid. The frame includes sidewalls and upstanding male detent elements with outwardly extending detent protrusions. The lid includes a generally planar top with peripheral lip portions. Slots are formed at the intersection of the lid and the peripheral lip portions so that upstanding male detent elements can extend therethrough and detent engage the frame to the lid. Variations of the detent engagement are shown in different embodiments, by which can be achieved a reduced height of the electromagnetic shielding device.

Claims

1. A shielding enclosure for an electromagnetic device, the shielding enclosure comprising:

a frame including side walls and an open top, the side walls including elements extending upwardly above the open top, the elements including lateral detent protrusions above the open top; and

a lid to cover the open top of the frame, the lid including a downwardly extending lip which surrounds the frame and has semi-circular cut-out portions in which the lateral detent protrusions nest to engage the elements extending upwardly above the open top.

2. The shielding enclosure of claim 1, wherein, after the upwardly extending elements have engaged the semi-circular cut-out portions, the frame and the lid have a combined height not exceeding 1.4 millimeter.

3. The shielding enclosure of claim 1, wherein, after the upwardly extending elements have engaged the semi-circular cut-out portions, the frame and the lid have a combined height not exceeding 0.9 millimeter.

4. The shielding enclosure of claim 1, wherein the lateral detent protrusions are positioned with their centers above the height of the side walls, whereby the height of the side walls may be reduced to thereby provide an ultra-low profile shielding enclosure.

5. A shielding enclosure for an electromagnetic device, the shielding enclosure comprising:

a frame including side walls and an open top, the side walls including elements extending upwardly above the open top, the elements having lateral detent protrusions thereon; and

a lid to cover the open top of the frame, the lid including slots in which are received the elements extending upwardly above the open top of the frame, and a downwardly extending lip that surrounds the frame, the downwardly extending lip having cut-out portions in which the lateral detent protrusions nest, for engaging the elements extending upwardly above the open top of the frame.

6. The shielding enclosure of claim 5, wherein the cut-out portions comprise semi-circular cut-out portions in which the lateral detent protrusions nest.

7. The shielding enclosure of claim 5, wherein, after the elements extending upwardly above the open top of the frame have engaged the cut-out portions, the frame and the lid have a combined height not exceeding 1.4 millimeter.

8. The shielding enclosure of claim 5, wherein, after the elements extending upwardly above the open top of the frame have engaged the cut-out portions, the frame and the lid have a combined height not exceeding 0.9 millimeter.

9. The shielding enclosure of claim 5, wherein the lateral detent protrusions are positioned with their centers above the height of the side walls, whereby the height of the side walls may be reduced to thereby provide an ultra-low profile shielding enclosure.

10. A shielding enclosure for an electromagnetic device, the shielding enclosure comprising:

a frame including side walls, an open top, and a fillet radius extending generally between the side walls and the open top, the side walls including upwardly extending elements that extend above the open top, the upwardly extending elements having cut-out portions therein;

a lid to cover the open top of the frame, the lid including a downwardly extending lip that surrounds the frame, the downwardly extending lip having flanges extending upwardly from the lip, which flanges include lateral detent protrusions that nest within the frame'"'"'s cut-out portions, for engaging the upwardly extending elements of the frame.

11. The shielding enclosure of claim 10, wherein the cut-out portions comprise semi-circular cut-out portions in which the lateral detent protrusions nest.

12. The shielding enclosure of claim 10, wherein the cut-out portions of the upwardly extending elements extend to a height that is above the frame'"'"'s side walls and within the fillet radius, whereby the height of the side walls may be reduced to provide an ultra-low profile shield enclosure.

13. The shielding enclosure of claim 10, wherein, after the frame'"'"'s upwardly extending elements have engaged the lid'"'"'s cut-out portions, the frame and the lid have a combined height not exceeding 1.4 millimeter.

14. The shielding enclosure of claim 10, wherein, after the frame'"'"'s upwardly extending elements have engaged the lid'"'"'s cut-out portions, the frame and the lid have a combined height not exceeding 0.9 millimeter.

15. The shielding enclosure of claim 10, wherein the flanges are generally coplanar with the lip.

16. The shielding enclosure of claim 10, wherein the frame'"'"'s upwardly extending elements are generally coplanar with the side walls of the frame.

17. The shielding enclosure of claim 10, wherein the frame'"'"'s upwardly extending elements are aligned with the lid'"'"'s flanges in a mating arrangement.

18. A method relating to an EMI shielding enclosure including a frame and a cover, the frame having side walls with elements that extend upwardly above the top of the frame, which elements have a first retaining feature therein, and the cover having a downwardly extending lip with flanges extending upwardly therefrom, which flanges have a second mating feature therein, the method comprising positioning the cover relative to the frame such that the first retaining feature of the frame'"'"'s upwardly extending elements engage the second retaining feature of the flanges extending upwardly from the cover, to thereby retain the cover on the frame.

19. The method of claim 18, wherein the first retaining feature includes lateral detent protrusions, and wherein the second retaining feature include cut-out portions in which the lateral detent portions nest.

20. The method of claim 18, wherein the first retaining feature includes cut-out portions, and wherein the second retaining feature include lateral detent protrusions that nest within the cut-out portions.