Integrated packaged having magnetic components

• US 20060152911A1
• Filed: 01/10/2006
• Published: 07/13/2006
• Est. Priority Date: 01/10/2005
• Status: Active Grant

• Current Assignee: Littelfuse Incorporated
• Original Assignee: IXYS Corporation (Littelfuse Incorporated)
• Inventors: Humbert, Donald, Furnival, Courtney R.
• Granted Patent: US 7,307,341 B2
• Time in Patent Office: Days
• US Class Current: 361/782
• CPC Class Codes: H01F 2019/085 Transformer for galvanic isolation
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01L 2224/45015 being circular
• CPC Class Codes: H01L 2224/45099 Material
• 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 23/3128 the substrate having spherical bumps for external connection
• CPC Class Codes: H01L 23/49822 Multilayer substrates multilayer metallisation on monolayer substrate H01L23/498
• CPC Class Codes: H01L 23/50 for integrated circuit devices, e.g. power bus, number of leadsH01L23/482 - H01L23/498 take precedence
• CPC Class Codes: H01L 24/48 of an individual wire connector
• CPC Class Codes: H01L 25/16 the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
• 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 2924/13055 Insulated gate bipolar transistor [IGBT]
• CPC Class Codes: H01L 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
• 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 2924/19041 being a capacitor
• CPC Class Codes: H01L 2924/19105 in a side-by-side arrangement on a common die mounting substrate
• CPC Class Codes: H01L 2924/207 : Diameter ranges
• CPC Class Codes: H05K 1/165 : incorporating printed inductors

Abstract

A packaged device is obtained using an innovative package approach that allows integration of miniature planar magnetics into standard low-cost semiconductor packages (BGA, PDIP, SOIC, etc.) with electronic and electrical components, where those components can be C&W and/or SMD types. The packaged device includes a planar magnetic substrate having first and second dielectric layers, the first dielectric layer having a first winding defined thereon, the second dielectric layer having a second winding defined thereon. A magnetic component is provided in the substrate. A package material provided at least partly around the substrate and the magnetic component to protect the substrate and magnetic component. The magnetic component is an inductor or transformer. The packaged device further includes at least one semiconductor component provided on the first dielectric layer.

Claims

1. A packaged device, comprising:

a substrate having first and second dielectric layers, the first dielectric layer having a first winding defined thereon, the second dielectric layer having a second winding defined thereon;

a magnetic assembly provided in the substrate;

an input die provided on the first dielectric layer to receive a first signal and transmit a second signal to the magnetic assembly;

an output die provided on the first dielectric layer to receive the second signal via the magnetic assembly and output a third signal to an external node; and

a package material provided over the magnetic assembly, the input die, and the output die to protect the magnetic assembly, the input die, and the output die from being damaged.

2. The packaged device of claim 1, wherein the device is a gate driver.

3. The packaged device of claim 1, wherein the magnetic assembly is a transformer and facilitates in isolating the input die from the output die.

4. The packaged device of claim 1, wherein the magnetic assembly includes a U-core and an I-bar.

5. The packaged device of claim 4, wherein the I-bar is bonded to the substrate only on a middle part of the I-bar.

6. The packaged device of claim 4, wherein the substrate includes a third dielectric layer having a groove to receive the I-bar, wherein the third dielectric layer is a bottom layer and the first dielectric layer is a top layer.

7. The packaged device of claim 6, further comprising:

a plurality of first balls associated with the input die and secured to the third dielectric layer of the substrate; and

a plurality of second balls associated with the output die and secured to the third dielectric layer of the substrate,

wherein the first balls and the second balls are placed on the opposite ends of the substrate.

8. The packaged device of claim 7, wherein the first balls are arranged in a single row.

9. The packaged device of claim 7, wherein the first balls are arranged in at least two rows.

10. The packaged device of claim 4, wherein the U-core includes first and second posts that are inserted into first and second holes on the substrate, the first post being associated with the first winding, the second post being associated with the second winding.

11. The packaged device of claim 10, wherein the first and second posts have an angular-shape or round shape.

12. The packaged device of claim 1, wherein the device is configured to provide an isolation capacity of at least 3700 volts.

13. The packaged device of claim 12, wherein the device has a height of no more than 0.15 inch, a width of no more than 0.3 inch, and a length of no more than 0.5 inch.

14. The power device of claim 12, wherein the device has a height of about 0.11 inch, a width of about 0.22 inch, and a length about 0.42 inch.

15. The power device of claim 1, wherein the device has a height of no more than 0.3 inch, a width of no more than 0.5 inch, and a length of no more than 1 inch.

16. The power device of claim 1, wherein the device is a ball-grid-array package type or a plastic-dual-in-line-package type.

17. A packaged device, comprising:

a planar magnetic substrate having first and second dielectric layers, the first dielectric layer having a first winding defined thereon, the second dielectric layer having a second winding defined thereon;

at least one magnetic component provided in the substrate; and

a package material provided at least partly around the substrate and the magnetic component to protect the substrate and magnetic component,

wherein the magnetic component is integrated into the packaged device using a semiconductor package technology.

18. The packaged device of claim 17, wherein the magnetic component is an inductor or transformer.

19. The packaged device of claim 17, further comprising:

at least one electronic component provided on the first dielectric layer, wherein the semiconductor package technology is one selected from a BGA assembly process, PDIP assembly process, and SOIC assembly process.

20. The packaged device of claim 17, further comprising:

at least one electrical component provided on the first dielectric layer.

21. The packaged device of claim of claim 20, wherein the electrical component is a resistor or capacitor.

22. The packaged device of claim 17, wherein the substrate and the magnetic component are configure to accommodate an automatic pack and place process.