Method for providing electromagnetic shielding of an electrical circuit

• US 5,428,508 A
• Filed: 04/29/1994
• Issued: 06/27/1995
• Est. Priority Date: 04/29/1994
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Pronto, Stephen R.
• Primary Examiner(s): Ledynh, Bot L.
• Application Number:
  US08/235,613
• Time in Patent Office: 424 Days
• Field of Search: 174/35 R, 174/35 MS, 361/816-818, 439/607-610, 228/179.1, 228/180.1, 29/592.1, 29/878-879, 29/884, 29/876-877
• US Class Current: 361/818
• CPC Class Codes: H05K 9/0026 integrally formed from metal sheet
• CPC Class Codes: H05K 9/0028 with retainers or specific soldering features
• CPC Class Codes: H05K 9/003 made from non-conductive materials comprising an electro-conductive coating H05K9/0031 takes precedence
• CPC Class Codes: Y10T 29/4921 with bonding
• CPC Class Codes: Y10T 29/49211 of fused material

Abstract

An electrical circuit (101) that is disposed on a substrate (103) employs a method and apparatus for providing electromagnetic shielding of the electrical circuit (101). One or more compressible, electrically conductive contacts (107), each of which includes a substantially planar portion (201), are coupled at their respective planar portions (201) to a receptacle area (105) on the substrate (103) that substantially encircles the electrical circuit (101). A shielding enclosure (109) having a top portion (110) and a plurality of side portions (111) is positioned upon the compressible, electrically conductive contacts (107) such that the side portions (111) compress at least some of the compressible, electrically conductive contacts (107) to substantially enclose the electrical circuit (101).

Claims

1. A method for providing electromagnetic shielding of an electrical circuit that is disposed on a substrate, the method comprising the steps of:

a) providing at least one compressible, electrically conductive, essentially Z-shaped contact that includes a substantially planar first portion;

b) conductively affixing, substantially simultaneously with the disposition of the electrical circuit on the substrate, the substantially planar first portion of the at least one compressible, electrically conductive essentially Z-shaped contact to at least one receptacle area on the substrate that substantially encircles the electrical circuit; and

c) positioning a shielding enclosure that includes a top portion and a plurality of side portions upon the at least one compressible, electrically conductive essentially Z-shaped contact such that the plurality of side portions compress removably against the at least one compressible, electrically conductive essentially Z-shaped contact to substantially enclose the electrical circuit.

2. The method of claim 1, wherein step (a) comprises the step of providing a plurality of compressible, electrically conductive essentially Z-shaped contacts that each includes a substantially planar first portion.

3. The method of claim 2, wherein step (b) comprises the step of coupling the substantially planar first portion of each of the plurality of compressible, electrically conductive essentially Z-shaped contacts to the at least one receptacle area.

4. The method of claim 3, wherein step (b) comprises the step of soldering the substantially planar first portion of each of the plurality of compressible, electrically conductive essentially Z-shaped contacts to the at least one receptacle area.

5. The method of claim 3, wherein step (c) comprises the step of positioning the shielding enclosure upon the plurality of compressible, electrically conductive essentially Z-shaped contacts such that the plurality of side portions compress at least some of the plurality of compressible, electrically conductive contacts to substantially enclose the electrical circuit.

6. The method of claim 1, wherein step (b) further comprises the step of automatically placing the at least one compressible, electrically conductive essentially Z-shaped contact onto the at least one receptacle area.