Apparatus of antenna with heat slug and its fabricating process

• US 20060071308A1
• Filed: 06/10/2005
• Published: 04/06/2006
• Est. Priority Date: 10/05/2004
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Yeh, Shih-Huang, Tang, Chia-Lun, Lu, Zih-Hao
• Granted Patent: US 7,145,511 B2
• Time in Patent Office: Days
• US Class Current: 257/675
• CPC Class Codes: H01L 2223/6677 for antenna, e.g. antenna included within housing of semiconductor device antennas per se H01Q
• CPC Class Codes: H01L 2224/05599 Material
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/48235 connecting the wire to a via metallisation of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 23/04 characterised by the shape of the container or parts, e.g. caps, walls
• CPC Class Codes: H01L 23/3675 characterised by the shape of the housing
• CPC Class Codes: H01L 23/66 High-frequency adaptations
• CPC Class Codes: H01L 24/45 of an individual wire connector
• CPC Class Codes: H01L 24/48 of an individual wire connector
• CPC Class Codes: H01L 25/0655 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/00015 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed as prior art
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/14 Integrated circuits
• CPC Class Codes: H01L 2924/15311 being a ball array, e.g. BGA
• CPC Class Codes: H01L 2924/16152 Cap comprising a cavity for hosting the device, e.g. U-shaped cap
• CPC Class Codes: H01L 2924/3025 : Electromagnetic shielding
• CPC Class Codes: H01Q 1/2283 : mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
• CPC Class Codes: H01Q 1/242 : specially adapted for hand-held use
• CPC Class Codes: H01Q 1/34 : Adaptation for use in or on ships, submarines, buoys or torpedoes for subaqueous use H01Q1/04
• CPC Class Codes: H01Q 9/0421 : with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

An apparatus of antenna with heat slug and its fabricating process are provided, in which the antenna with heat slug can be realized with a single sheet or double sheets of metal. A dual-band antenna module with a mask cover is taken as an example to realize the apparatus. Each single sheet of metal can be achieved by simply cutting and bending a metal plate. Thereby, it is a simple and low-cost fabricating process. In the known fabricating process of integrated circuit, the heat slug and the antenna can be combined in a module at the same step. Therefore, integrating the antenna with heat slug in a fabricating process needs not to develop a new process.

Claims

1. An apparatus of antenna with heat slug, comprising:

a substrate having an upper surface and a lower surface, said lower surface having a plurality of solder balls for electrically connecting to an external circuit;

an antenna signal transmission line formed on said upper surface of said substrate;

at least a chip attached on said upper surface of said substrate and electrically connecting to said antenna signal transmission line;

at least a metal belt formed on said upper surface of said substrate;

at least a metal sheet having the functions of an antenna and heat dissipating, placed on said upper surface of said substrate; and

a mold compound encompassing at least said chip, said antenna signal transmission line and said metal belts.

2. The apparatus as claimed in claim 1, wherein said at least a metal sheet is a single metal sheet, said single metal sheet is made by cutting or molding a metal sheet into a specific shape and then bending said metal sheet, said single metal sheet comprising:

a heat slug having an antenna, placed above said chip and kept a distance from said chip; and

a plurality of support elements, one of said support elements being an antenna feed metal sheet for electrically connecting to said antenna signal transmission line, and the remaining support elements electrically connecting to each said metal belt.

3. The apparatus as claimed in claim 2, wherein the shape of said heat slug having an antenna is either round or rectangular.

4. The apparatus as claimed in claim 2, wherein said heat slug with an antenna and said support elements are perpendicular.

5. The apparatus as claimed in claim 2, wherein said heat slug with an antenna and said substrate are parallel.

6. The apparatus as claimed in claim 1, wherein said at least a metal sheet is a single metal sheet, said single metal sheet is made by cutting or molding a metal sheet into a specific shape and then bending said metal sheet, said single metal sheet comprising:

a heat slug placed above said chip and kept a distance from said chip, said heat slug having a plurality of support elements underneath, said heat slug using said support elements to electrically connect to said metal belts, said metal belts connecting to a ground plane;

an antenna placed above said heat slug and kept a distance from said heat slug;

at least a connection metal sheet connecting said antenna and said heat slug; and

an antenna feed metal sheet having one end connecting to said antenna and the other end connecting to said antenna signal transmission line.

7. The apparatus as claimed in claim 6, wherein said connection metal sheet and said heat slug, said connection metal sheet and said antenna are both perpendicular.

8. The apparatus as claimed in claim 6, wherein said sealing body further encompasses the lower side of said antenna, the upper side of said heat slug, and the outer side of said support elements and said connection metal sheet.

9. The apparatus as claimed in claim 6, wherein said heat slug and said support elements are perpendicular.

10. The apparatus as claimed in claim 6, wherein said heat slug and said antenna are parallel and extend to a same direction.

11. The apparatus as claimed in claim 6, wherein said heat slug and said substrate are parallel.

12. The apparatus as claimed in claim 6, wherein said antenna feed metal sheet and said antenna are perpendicular.

13. The apparatus as claimed in claim 1, wherein said at least a metal sheet further comprises a first metal sheet and a second metal sheet, said first and second metal sheets are made by cutting or molding a metal sheet into a specific shape and then bending said metal sheet, respectively, said first metal sheet further comprising:

a heat slug, placed above said chip and kept a distance from said chip; and

a plurality of support elements electrically connect to said metal belts, said metal belts connecting to a ground plane;

said second metal sheet further comprising;

an antenna placed above said heat slug and kept a distance from said heat slug; and

an antenna feed metal sheet having one end connecting to said antenna and the other end connecting said antenna signal transmission line,

wherein said mold compound encompasses the upper side of said heat slug and the outer side of said support elements, said antenna is placed above said mold compound and said antenna feed metal sheet feeds said antenna from the side.

14. The apparatus as claimed in claim 13, wherein the shape of said antenna is either round or rectangular.

15. The apparatus as claimed in claim 13, wherein the shape of said antenna feed metal sheet is either triangular or rectangular.

16. The apparatus as claimed in claim 13, wherein said heat slug and said support elements are perpendicular.

17. The apparatus as claimed in claim 13, wherein said heat slug and said antenna are parallel and extend to the same direction.

18. The apparatus as claimed in claim 13, wherein said heat slug and said substrate are parallel.

19. The apparatus as claimed in claim 13, wherein said antenna feed metal sheet and said antenna are perpendicular.

20. A process of fabricating an antenna with heat slug, comprising the following steps of:

(a) providing a substrate, on an upper surface of said substrate, an antenna signal transmission line and a plurality of metal belts being formed, and at least a chip being attached and wire bonded;

(b) placing an antenna and a heat slug on said upper surface of said substrate and applying a mold compound; and

(c) placing a plurality of solder balls on the lower surface of said substrate.

21. The process as claimed in claim 20, wherein said antenna and said heat slug are made of a single metal sheet and said single metal sheet has a plurality of support elements, said step (b) further comprises the following steps:

cutting or molding said single metal sheet into a specific shape;

bending said single metal sheet;

placing said single metal sheet above said chip, connecting said antenna feed metal sheet to said antenna signal transmission line, and connecting each of said support element to each of said metal belt; and

applying a molding compound to encompass said chip, said antenna signal transmission line and said metal belts.

22. The process as claimed in claim 21, wherein a heat slug with an antenna is further formed by said single metal sheet, and an antenna feed metal sheet is formed by one of said support elements.

23. The process as claimed in claim 21, wherein at least a connection metal sheet and an antenna feed metal sheet is further formed by said single metal sheet.

24. The process as claimed in claim 20, wherein said antenna and said heat slug are made of a first metal sheet and a second metal sheet, said first metal sheet has heat slug and a plurality of support elements, said second metal sheet has an antenna and an antenna feed metal sheet, said step (b) further comprises the following steps:

cutting or molding said first and second metal sheets into a specific shape, respectively;

bending said first and second metal sheets so that said antenna and said antenna feed metal sheet being perpendicular, and said heat slug and said support elements being perpendicular;

placing said heat slug above said at least a chip, and connecting each of said support element to each of said metal belt;

applying a molding compound on the upper side of sad heat slug and the outer side of said support elements to encompass said chip, said antenna signal transmission line and said metal belts; and

placing said antenna above said mold compound and connecting said antenna feed metal sheet to said antenna signal transmission line.

25. An apparatus of antenna with heat slug, comprising:

a substrate having an upper surface and a lower surface,

a high-frequency circuitry formed on said upper surface of said substrate, said high-frequency circuitry having a signal transmission line therein;

a mask cover formed on said upper surface of said substrate and having the function of heat dissipating;

a metal sheet at least comprising a dual-band antenna module, and said dual-band antenna module being above said mask cover; and

a mold compound encompassing at least said high-frequency circuitry.

26. The apparatus as claimed in claim 25, wherein said dual-band antenna module further comprises an antenna unit, a first path antenna unit working in a high-frequency range, and a second path antenna unit working in a low-frequency range.

27. The apparatus as claimed in claim 25, wherein said metal sheet further includes said mask cover.

28. The apparatus as claimed in claim 25, wherein said mask cover further includes a heat slug and a plurality of support elements.

29. The apparatus as claimed in claim 26, wherein said mold compound encompass the lower side of said dual-band antenna module and the outer side of said support elements for holding the module in place.

30. The apparatus as claimed in claim 26, wherein said metal sheet further includes an antenna feed metal sheet for electrically connecting to said antenna signal transmission line, and at least two connect metal sheets for connecting said first and second path antenna units and said mask cover.

31. The apparatus as claimed in claim 26, wherein said apparatus arranges another metal sheet to construct said mask cover.