IP Library Granted Patent US 7,667,308
Granted Patent B2
US 7,667,308 · App. 11/459,568 · Granted Feb 23, 2010

Leaded stacked packages having integrated upper lead

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Quick Facts
Patent No.
US 7,667,308
App. No.
11/459,568
Granted
Feb 23, 2010
Kind
B2
Abstract

A semiconductor package includes a leadframe. An upper lead is disposed above the leadframe. A first die is attached to a lower surface of the upper lead to provide electrical conductivity from the first die to the upper lead. A second die is attached to the first die. A method of manufacturing a semiconductor package includes providing a leadframe having an upper lead, lower lead, and an elevated die paddle. A first die, attached to a plurality of dies in a wafer form, is attached to a second die. The first die is singulated from the plurality of dies. The first and second dies are attached to the elevated die paddle structure. The first die is wire bonded to the lower lead. An encapsulant is formed over the first and second dies. The elevated die paddle is removed to expose a surface of the upper lead and second die.

Claims (31)

1. A semiconductor package comprising:

a leadframe;

an upper lead disposed above the leadframe;

a first die attached to a lower surface of the upper lead to provide electrical conductivity from the first die to the upper lead;

a second die attached to the first die; and

a removable elevated die paddle disposed above the upper lead and second die to temporarily support the first and second dies within the semiconductor package during manufacturing.

2. The semiconductor package of claim 1 , wherein the removable elevated die paddle is removed using a grind wheel.

3. The semiconductor package of claim 1 , wherein a surface of the upper lead is adapted to provide electrical conductivity to a second semiconductor package configured in a package-on-package (PoP) arrangement.

4. The semiconductor package of claim 3 , wherein the second semiconductor package further comprises a leaded package, array package, flip chip die, or a passive component.

5. A semiconductor package comprising:

a leadframe;

an upper lead and elevated die paddle assembly disposed above the leadframe, wherein a portion of the upper lead and elevated die paddle assembly is removed to provide electrical conductivity to a second semiconductor package;

a first die connected a lower surface of the upper lead and elevated die paddle assembly to support the first die within the semiconductor package;

a second die connected to the first die; and

an encapsulant formed over a portion of the second die and upper lead for providing structural support to the first and second die within the semiconductor package.

6. The semiconductor package of claim 5 , wherein the second die further includes a land grid array (LGA) or Quad Flat Nonleaded (QFN) package.

7. The semiconductor package of claim 5 , wherein the second semiconductor package is adapted for a package-on-package (PoP) arrangement.

8. The semiconductor package of claim 7 , wherein the second semiconductor package further comprises a leaded package, array package, flip chip die, or a passive component.

9. A method of manufacturing a semiconductor package comprising:

providing a leadframe having an upper lead, a lower lead, and a elevated die paddle;

attaching a first die to a second die, the first die attached to a plurality of dies in a wafer form;

singulating the first die from the plurality of dies; and

attaching the first and second dies to the elevated die paddle structure;

wire bonding the first die to the lower lead;

forming an encapsulant over a portion of the first and second dies; and

removing the elevated die paddle to expose a surface of the upper lead and second die.

10. The method of manufacturing of claim 9 , wherein removing the elevated die paddle is performed using a grinding process.

11. The method of manufacturing of claim 10 , wherein the grinding process further includes wheel grinding, chemical etching or a chemical mechanical polishing (CMP) process.

12. The method of manufacturing of claim 9 , wherein the first die is attached to the second die using a ball grid array (BGA).

13. The method of manufacturing of claim 9 , wherein a surface of the upper lead is adapted to provide electrical conductivity to a second semiconductor package configured in a package-on-package (PoP) arrangement.

14. The method of manufacturing of claim 13 , wherein the second semiconductor package further comprises a leaded package, array package, flip chip die, or a passive component.

Assignments (6)
CORRECTIVE ASSIGNMENT TO CORRECT THE CONVEYING PARTY DATA FROM STATS CHIPPAC PTE. LTE. TO STATS CHIPPAC LTD. AND CORRECT THE NAME OF RECEIVING PARTY DATA FROM STATS CHIPPAC PTE. LTE. TO STATS CHIPPAC PTE. LTD. PREVIOUSLY RECORDED AT REEL: 64838 FRAME: 948. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Recorded May 29, 2024
From: STATS CHIPPAC LTD.
To: STATS CHIPPAC PTE. LTD.
Reel/Frame 067534/0872 →
CORRECT ERROR IN ASSIGNMENT NAME FROM STATS CHIPPAC PTE. LTE. TO STATS CHIPPAC PTE. LTD. (REEL: 038378 FRAME: 0328 Recorded Aug 30, 2023
From: STATS CHIPPAC PTE. LTE.
To: STATS CHIPPAC PTE. LTE.
Reel/Frame 064838/0948 →
RELEASE OF SECURITY INTEREST Recorded Jun 15, 2020
From: CITICORP INTERNATIONAL LIMITED, AS COMMON SECURITY AGENT
To: STATS CHIPPAC, INC.; STATS CHIPPAC PTE. LTD. FORMERLY KNOWN AS STATS CHIPPAC LTD.
Reel/Frame 052935/0327 →
CHANGE OF NAME Recorded Apr 7, 2016
From: STATS CHIPPAC LTD.
To: STATS CHIPPAC PTE. LTE.
Reel/Frame 038378/0328 →
SECURITY INTEREST Recorded Aug 6, 2015
From: STATS CHIPPAC, INC.; STATS CHIPPAC LTD.
To: CITICORP INTERNATIONAL LIMITED, AS COMMON SECURITY AGENT
Reel/Frame 036288/0748 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 7, 2006
From: DO, BYUNG TAI; KUAN, FRANCIS HEAP HOE; CHOW, SENG GUAN
To: STATS CHIPPAC, LTD.
Reel/Frame 018065/0313 →