LEAD FRAME ASSEMBLY
A leadframe assembly includes a leadframe having a die attach pad and a first plurality of leads. A first generally sine wave-shaped wire having a first end and a second end has a first end of thereof attached to a first one of the first plurality of leads and the second end thereof attached to a second one of the first plurality of leads. A method of making a leadframe assembly includes forming an inductor on a leadframe by bending a first wire into a generally sine wave-shaped configuration and attaching the first wire to a first set of leads of the leadframe.
The present application is a continuation of U.S. Nonprovisional application Ser. No. 14/930,142, filed Nov. 2, 2015, which is incorporated herein by reference in their entirety.
BACKGROUNDIntegrated circuit dies include active circuit elements, such as transistors. The active circuit elements must sometimes be connected to passive circuit elements such as inductors, capacitors and resistors in order to perform desired operations. Inductors and other passive circuit elements are usually provided as separate discrete components that are connected to an integrated circuit die, rather than being formed as part of the die itself.
SUMMARYA leadframe assembly includes a leadframe having a die attach pad (DAP) and a first plurality of leads. A first generally sine wave-shaped wire having a first end and a second end has the first end thereof attached to a first one of the first plurality of leads and the second end thereof attached to a second one of the first plurality of leads to form an inductor on the leadframe.
An integrated circuit package includes a leadframe having a die attach pad (DAP) and a first and second plurality of leads. First and second generally sine wave-shaped wires are attached to the first and second plurality of leads, respectively, said the wire positioned in opposed, spaced apart relationship with the second wire. At least one die is mounted on the DAP and electrically connected to the first and second wires.
A method of making a leadframe assembly includes forming an inductor on a leadframe by bending a first wire into a generally sine wave-shaped configuration and attaching the first wire to a first set of leads of the leadframe.
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A sequence of operations by which an integrated circuit package with an inductor may be produced is illustrated by
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The integrated circuit package 160 thus includes an inductor assembly formed by wires 120 and 140 that are attached to leads of a single leadframe as opposed to the integrated circuit package 60 of
Embodiments of a leadframe assembly and a method of making a leadframe assembly are described in detail herein. Alternative embodiments of such a leadframe assembly and production methods will occur to those skilled in the art after reading this disclosure. It is intended that the language of the appended claims be construed broadly to cover such alternative embodiments, except as limited by the prior art.
Claims
1. An integrated circuit (IC) package comprising:
- a first plurality of leads and a second plurality of leads, a first die attach pad and a second die attach pad;
- a first bond wire attached to two leads of the first plurality of leads; and
- a second bond wire attached to two leads of the second plurality of leads, wherein a plane of the first bond wire is parallel to a plane of the second bond wire, and portions of the first bond wire and the second bond wire overlap with each other.
2. The IC package of claim 1 further comprising a first IC die attached to the first die attach pad and a second IC die attached to the second die attach pad, each of the first IC die and the second IC die electrically connected to at least one of the plurality of first leads or the plurality of second leads.
3. The IC package of claim 1, wherein the first bond wire does not contact with the second bond wire.
4. The IC package of claim 1, wherein the first bond wire and the second bond wire are generally sine wave shaped.
5. The IC package of claim 1, wherein the first bond wire and the second bond wire are generally M shaped.
6. The IC package of claim 1, wherein the first bond wire includes two foot portions attached to the two leads of the first plurality of leads, and the second bond wire includes two foot portions attached to the two leads of the second plurality of leads.
7. The IC package of claim 6, wherein the two foot portions of each of the first bond wire and the second bond wire are wedge bonded to the two leads of the first plurality of leads and the two leads of the second plurality of leads respectively.
8. The IC package of claim 1, wherein each of the first bond wire and the second bond wire includes copper.
9. The IC package of claim 1, wherein the second plurality of leads is positioned laterally opposite the first plurality of leads.
10. The IC package of claim 1, wherein the first bond wire is wire bonded to the two leads of the first plurality of leads and the second bond wire is wire bonded to the two leads of the second plurality of leads.
11. An integrated circuit (IC) package comprising:
- a lead frame including a first plurality of leads and a second plurality of leads, a first die attach pad and a second die attach pad;
- a first bond wire attached to two leads of the first plurality of leads;
- a second bond wire attached to two leads of the second plurality of leads, portions of the first bond wire and the second bond wire parallel to and overlapping with each other;
- a first IC die attached to the first die attach pad and electrically connected to at least one of the plurality of first leads or at least one of the plurality of second leads; and
- mold compound covering portions of the lead frame, the first bond wire, the second bond wire, and the first IC die.
12. The IC package of claim 11 further comprising a second IC die attached to the second die attach pad and electrically connected to at least one of the plurality of first leads or at least one of the plurality of second leads, and wherein the mold compound covers portions of the second IC die.
13. The IC package of claim 11, wherein the first bond wire and the second bond wire together form an inductor.
14. The IC package of claim 11, wherein the first bond wire includes two foot portions attached to the two leads of the first plurality of leads, and the second bond wire includes two foot portions attached to the two leads of the second plurality of leads.
15. The IC package of claim 14, wherein a distance between the two foot portions of the first bond wire or the second bond wire is 750 micrometers.
16. The IC package of claim 12, wherein the first IC die or the second IC die is electrically connected to the first bond wire and the second bond wire.
17. The IC package of claim 11, wherein planes of the first bond wire and the second bond wire are parallel to a plane of the first die attach pad and a plane of the second die attach pad.
18. The IC package of claim 11, wherein portions of the first plurality of leads and the second plurality of leads extend through the mold compound.
Type: Application
Filed: Dec 10, 2018
Publication Date: Apr 18, 2019
Inventor: Makoto Shibuya (Beppu City)
Application Number: 16/215,148