Shield can with integrally molded gasket

• US 6,051,779 A
• Filed: 11/21/1996
• Issued: 04/18/2000
• Est. Priority Date: 11/21/1996
• Status: Expired due to Term

• Current Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Gammon, John Weldon
• Primary Examiner(s): Kincaid, Kristine
• Assistant Examiner(s): Ngo, Hung V
• Application Number:
  US08/752,858
• Time in Patent Office: 1,244 Days
• Field of Search: 174/35 GC, 174/35 R, 361/816, 361/818, 361/753
• US Class Current: 174/384
• CPC Class Codes: H05K 9/0015 Gaskets or seals

Abstract

An improved RF shielding device is disclosed. An RF shielding device includes a shield can having sidewalls defining a number of guide tabs thereon enabling the shield can to be inserted within a molding apparatus such that an electrically conductive gasket may be molded directly to the sidewalls of the shield can.

Claims

1. A shield can for shielding components on a printed circuit board from electromagnetic interference, comprising:

a shield can plate having a peripheral edge thereon;

a sidewall extending from the shield can plate and having a first end connected to the peripheral edge of the shield can plate and a second end defining at least one tab integrally formed with the second end of the sidewall and extending parallel therefrom for aligning the shield can with a gasket mold, wherein the second end of the sidewall further has a known position variance with respect to the shield can plate; and

a gasket integrally fitted to an edge of the second end of the sidewall, wherein the gasket has a predefined shape with a width fixed at a substantially constant distance independent of variations in position of the second end of the sidewall, wherein the distance is approximately equal to the known position variance of the second end of the sidewall.

2. The apparatus of claim 1 wherein the gasket is composed of an electrically conductive material.

3. A shield can, comprising:

a shield can plate for protecting circuitry on a printed circuit board from RF energies;

a sidewall extending from the shield can plate having a first end connected to an edge of the shield can plate, wherein a second end of the sidewall has a known position variance with respect to the shield can plate; and

a gasket integrally fitted to an edge of the second end of the sidewall, the gasket providing a low conductive resistance interfaced with the printed circuit board, the gasket further has a predefined shape with a width fixed at a substantially constant distance independent of variations in position of the second end of the sidewall, wherein the distance is approximately equal to the known position variance of the second end of the sidewall.

4. The apparatus of claim 3 further including a plurality of tabs integrally formed with the second end of the sidewall.

5. The apparatus of claim 3 wherein the gasket is composed of an electrically conductive material.

6. A shield can, comprising:

a shield can plate for protecting circuitry from RF energies;

a sidewall extending from the shield can plate having a first end connected to an edge of the shield can plate;

a plurality of tabs integrally formed with a second end of the sidewall for aligning the sidewall with a gasket molding apparatus, wherein the second end of the sidewall has a known position variance with respect to the shield can plate; and

a gasket integrally fitted to an edge of the second end of the sidewall, the gasket providing a surface for engaging a printed circuit board, the gasket further has a predefined shape with a width fixed at a substantially constant distance independent of variations in position of the second end of the sidewall, wherein the distance is approximately equal to the known position variance of the second end of the sidewall.