Metallization and anodization of plastic and conductive parts of the body of an apparatus

• US 9,413,861 B2
• Filed: 10/05/2012
• Issued: 08/09/2016
• Est. Priority Date: 10/05/2012
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Lasarov, Harri, Fahlgren, Anton
• Primary Examiner(s): Hoffberg, Robert J
• Assistant Examiner(s): MATEY, MICHAEL A
• Application Number:
  US13/645,996
• Publication Number:
  US 20140098502A1
• Time in Patent Office: 1,404 Days
• Field of Search: 361/746, 361/752, 361/765
• US Class Current: 1/1
• CPC Class Codes: G06F 1/181 Enclosures for portable computers G06F1/1613
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/0283 for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate

Abstract

A method of fabricating at least a portion of the body of an apparatus, such as a portable electronic device, that includes both plastic and conductive parts is provided with the body appearing relatively seamless such that the interface between the plastic and conductive parts is indistinguishable. In this regard, a plastic part may be combined with a conductive part to form at least a portion of the body of the portable electronic device. The surfaces of the plastic part and the conductive part may be metallized, such as by being subjected to vapor deposition, to metalize the surfaces of the plastic and conductive parts. The metalized surfaces of the plastic and conductive parts may then be anodized, thereby producing at least a portion of the body of a portable electronic device having plastic and conductive parts with a consistent appearance and a consistent tactile response.

Claims

1. A method comprising:

combining a plastic part and a conductive part to form at least a portion of a body of a portable electronic device;

forming a metal layer on and immediately adjacent to all exterior surfaces of both the plastic part and the conductive part in order to metallize all of the exterior surfaces of both the plastic part and the conductive part; and

anodizing all of the metallized surfaces of both the plastic part and the conductive part,

wherein the body including the plastic part, the conductive part, the metallization layer and the anodization layer form the exterior surface of the portable electronic device.

2. A method according to claim 1 wherein forming the metal layer on the surfaces of the plastic part and the conductive part comprises subjecting the surfaces of the plastic part and the conductive part to vapor deposition.

3. A method according to claim 2 wherein subjecting the surfaces of the plastic part and the conductive part to vapor deposition comprises subjecting the surfaces of the plastic part and the conductive part to non-conductive vapor metallization.

4. A method according to claim 3 wherein subjecting the surfaces of the plastic part and the conductive part to non-conductive vapor metallization comprises forming a layer transparent to radio frequency signals on the surfaces of the plastic part and the conductive part.

5. A method according to claim 1 wherein combining the plastic part and the conductive part comprises insert molding the plastic part relative to the conductive part.

6. A method according to claim 1 further comprising coating the surface of the plastic part with a primer prior to forming the metal layer on the surfaces of the plastic part and the conductive part.

7. A method according to claim 6 wherein the surface of the plastic part is recessed relative to the surface of the conductive part prior to coating the surface of the plastic part with the primer, and wherein the method further comprises polishing the primer following coating of the surface of the plastic part so as to align with the surface of the conductive part.

8. A body of an apparatus comprising:

a plastic part;

a conductive part combined with the plastic part;

a metallization layer on and immediately adjacent to all exterior surfaces of both the plastic part and the conductive part; and

an anodization layer on the metallization layer on all of the exterior surfaces of both the plastic part and the conductive part,

wherein the body including the plastic part, the conductive part, the metallization layer and the anodization layer form the exterior surface of the apparatus.

9. The body of an apparatus according to claim 8 wherein the metallization layer is comprised of a material transparent to radio frequency signals.

10. The body of an apparatus according to claim 9 wherein the metallization layer is comprised of aluminum.

11. The body of an apparatus according to claim 8 wherein the plastic part is comprised of polyphenylene sulfide (PPS).

12. The body of an apparatus according to claim 8 wherein the anodization layer is comprised of a metal oxide.

13. The body of an apparatus according to claim 8 further comprising a primer disposed between the surface of the plastic part and the metallization layer.

14. A portable electronic device comprising:

at least a portion of a housing comprising a plastic part and a conductive part combined with the plastic part, a metallization layer on and immediately adjacent to all exterior surfaces of both the plastic part and the conductive part, and an anodization layer on the metallization layer on all of the exterior surfaces of both the plastic part and the conductive part, wherein the housing including the plastic part, the conductive part, the metallization layer and the anodization layer form the exterior surface of the portable electronic device; and

electronic circuitry disposed at least partially within the housing.

15. The portable electronic device according to claim 14 wherein the electronic circuitry comprises an antenna aligned with the plastic part.

16. The portable electronic device according to claim 14 wherein the housing includes first and second portions with the first portion having a more complex geometry than the second portion, wherein the plastic part forms the first portion of the housing and the conductive part forms the second portion of the housing.

17. The portable electronic device according to claim 14 wherein the metallization layer is comprised of a material transparent to radio frequency signals.

18. The portable electronic device according to claim 14 wherein the plastic part is comprised of polyphenylene sulfide (PPS).

19. The portable electronic device according to claim 14 wherein the anodization layer is comprised of a metal oxide.

20. The portable electronic device according to claim 14 wherein the at least a portion of the housing further comprises a primer disposed between the surface of the plastic part and the metallization layer.