ELECTROMAGNETIC INTERFERENCE SHIELDING STRUCTURE AND VOICE COIL MOTOR HAVING SAME

• US 20110013789A1
• Filed: 12/02/2009
• Published: 01/20/2011
• Est. Priority Date: 07/15/2009
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: CHEN, GA-LANE
• Application Number:
  US12/629,131
• Publication Number:
  US 20110013789A1
• Time in Patent Office: Days
• US Class Current: 381/189
• CPC Class Codes: H02K 11/0141 Shields associated with casings, enclosures or brackets
• CPC Class Codes: H02K 41/0356 moving along a straight path

Abstract

An exemplary electromagnetic interference shielding structure, includes a substrate and a metallic film formed on at least one surface of the substrate. The substrate is made of an alloy of Ni and Fe, and the metallic film is made of an alloy of Ni, Fe, Cu and Mo.

Claims

1. An electromagnetic interference shielding structure, comprising:

a substrate made of an alloy of Ni and Fe; and

a metallic film formed onto at least one surface of the substrate, the metallic film being made of an alloy of Ni, Fe, Cu and Mo.

2. The structure as described in claim 1, wherein the metallic film contains Ni in a weight percentage in a range from 73 to 79, Fe in a weight percentage in a range from 17 to 23, Cu in a weight percentage in a range from 2 to 5, and Mo in a weight percentage in a range from 2 to 5.

3. The structure as described in claim 2, wherein the metallic film contains Ni in a weight percentage in a range from 76 to 78, Fe in a weight percentage in a range from 17 to 19, Cu in a weight percentage in a range from 3 to 4, and Mo in a weight percentage in a range from 2 to 4.

4. The structure as described in claim 1, wherein the substrate contains Ni in a weight percentage in a range from 78 to 82, and Fe in a weight percentage in a range from 18 to 22.

5. The structure as described in claim 1, wherein a thickness of the substrate is in a range from 50 μ

m to 1000 μ

m.

6. The structure as described in claim 5, wherein a thickness of the metallic film is in a range from 100 nm to 1000 nm.

7. The structure as described in claim 1, wherein the metallic film is formed onto the entire outer surface of the substrate.

8. A voice coil motor, comprising an electromagnetic interference shielding shell, and a voice coil module received in the shell, the shell comprising a substrate made of an alloy of Ni and Fe;

and a metallic film formed on at least one surface of the substrate, the metallic film being made of an alloy of Ni, Fe, Cu and Mo.

9. The voice coil motor as described in claim 8, wherein the metallic film contains Ni in a weight percentage in a range from 73 to 79, Fe in a weight percentage in a range from 17 to 23, Cu in a weight percentage in a range from 2 to 5, and Mo in a weight percentage in a range from 2 to 5.

10. The voice coil motor as described in claim 9, wherein the metallic film contains Ni in a weight percentage in a range from 76 to 78, Fe in a weight percentage in a range from 17 to 19, Cu in a weight percentage in a range from 3 to 4, and Mo in a weight percentage in a range from 2 to 4.

11. The voice coil motor as described in claim 8, wherein the substrate contains Ni in a weight percentage in a range from 78 to 82, and Fe in a weight percentage in a range from 18 to 22.

12. The voice coil motor as described in claim 8, wherein a thickness of the substrate is in a range from 50 μ

m to 1000 μ

m.

13. The voice coil motor as described in claim 12, wherein a thickness of the metallic film is in a range from 100 nm to 1000 nm.

14. The voice coil motor as described in claim 8, wherein the metallic film is formed on the entire outer surface of the substrate.

15. A voice coil motor, comprising an electromagnetic interference shielding shell, and a voice coil module received in the shell, the shell comprising a substrate made of an alloy of Ni and Fe;

and a metallic film formed on at least one surface of the substrate, the metallic film being made of an alloy of Ni, Fe, Cu and Mo, and the metallic film being the inmost surface of the entire shell and directly facing the voice coil module.