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EP0674476A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Shielding device

Assignee: Pulse Finland Oy
•
Filing: 1995-03-14
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Granted: —
•
Expires: 2015-03-14
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Abstract

Abstract The present invention relates to grounding a shielding device comprising a conductive housing metal box for a filter, particularly when the filter is mounted on a circuit board using surface mounting technique. As taught by the invention, protrusions (5) have been formed on a wall (4) of the conductive housing (1) of the box on which the box is grounded primarily by means of a soldering connection. The protrusions (5) can be so formed that they define as accurately as possible the level (A-A) in order to achieve good and uniform grounding in the surface mounting. With the design of the invention, +/- 0.05 mm planarity requirement can be met. In a primary embodiment, the wall of the shell (1) is of silver-coated aluminium, the thickness thereof being of the order 0.3 mm. The bumps are formed by embossing, the nominal height thereof being 0.3 mm. <IMAGE>

Inventors

  • 👤 Seppo Raatikainen

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 15:19
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 53 words
A shielding device for an electronic component comprising a conductive housing (1) including means for facilitating electronically coupling to an electronic component disposed therein, and grounding means for coupling the conductive housing to ground, characterised in that the grounding means comprise protrusions (5) formed in a wall (4) of the conductive housing (1).
Claim 2
Dependent Claim 38 words
A shielding device according to claim 1, wherein the protrusions (5) have been so formed that outermost points (5') thereof are adapted to be substantially co-planar (A-A) with portions of coupling means (12) external to the housing (1).
Claim 3
Dependent Claim 17 words
A shielding device according to claim 1 or 2, wherein the protrusions (5) are formable by embossing.
Claim 4
Dependent Claim 19 words
A shielding device according to any one of the preceding claims, wherein the housing (1) is of silver-coated aluminium.
Claim 5
Dependent Claim 19 words
A shielding device according to any of claims 2 to 4, wherein the coupling means (12) comprise conductive leads.
Claim 6
Dependent Claim 30 words
A shielding device according to any one of the preceding claims, wherein the thickness of the wall (4) of the housing (1) is in the range 0.2 to 0.4 mm.
Claim 7
Dependent Claim 26 words
A shielding device according to any one of the preceding claims, wherein the height of the protrusions (5) is in the range 0.2 to 0.5 mm.

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