IP Library Granted Patent US 8,648,474
Granted Patent B2
US 8,648,474 · App. 13/603,311 · Granted Feb 11, 2014

Lead frame land grid array

Inventors: Somchai Nondhasittichai (Bangkok, TH); Saravuth Sirinorakul (Bangkok, TH)
Assignee: UTAC Thai Limited
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,648,474
App. No.
13/603,311
Granted
Feb 11, 2014
Kind
B2
Abstract

A package includes a first plated area, a second plated area, a die attached to the first plated area, and a bond coupling the die to the second plated area. The package further includes a molding encapsulating the die, the bond, and the top surfaces of the first and second plated areas, such that the bottom surfaces of the first and second plated areas are exposed exterior to the package. Additional embodiments include a method of making the package.

Claims (24)

1. A package having a flip chip structure comprising:

a first plated area comprising a first and a second plated layer;

a second plated area comprising a first and a second plated layer, wherein the first plated area and the second plated area each have a top surface and a bottom surface wherein the first plated layer of the first plated area and the first plated layer of the second plated area are exposed at the bottom surface of the flip chip structure;

a die attached to the second plated layer of the first plated area and the second plated layer on the second plated area;

a bond comprising one or more solder balls, wherein the bond couples the die to the first plated area and the second plated area; and

a molding encapsulating the die, the bond, and the top surfaces of the first and second plated areas, wherein the bottom surfaces of the first and second plated areas are exposed exterior to the flip chip package.

2. The package of claim 1 , wherein the first plated area and the second plated area comprises contact pads.

3. The package of claim 1 , wherein the package is disposed within a molded block of packages, the molded block formed by using a metal layer and removing the metal layer from the molded block, such that the plated areas are exposed.

4. The package of claim 1 , wherein the second plated layer of the first plated area and the second plated layer of the second plated area comprise palladium.

5. The package of claim 1 , wherein the first plated area and the second plated area are exposed at a side surface of the package.

6. The package of claim 1 , wherein a third plated area comprises a ring surrounding the die pad.

7. The package of claim 1 , wherein the size of the package closely approximates the size of the die.

8. A semiconductor package comprising:

a. a plurality of contact pads, wherein each of plurality of the contact pads comprises a plurality of plated layers including a first plated layer;

b. a first semiconductor die having at least two bond pads that are coupled to two or more of the contact pads by two or more solder balls, wherein the at least two bond pads face the two or more of the contact pads; and

c. a resin encapsulant for encapsulating at least a portion of the plurality of contact pads and first semiconductor die such that bottom surfaces of the first plated layers of the plurality of contact pads are exposed exterior to the semiconductor package.

9. The package of claim 8 wherein at least one of the plated layers comprise palladium.

10. The package of claim 8 further comprising a second semiconductor die coupled to the first semiconductor die, the second semiconductor die having at least one bond pad, wherein the at least one bond pad is wire bonded to the two or more of the contact pads.

11. The package of claim 10 wherein the second semiconductor die is larger than the first semiconductor die.

12. The package of claim 8 wherein the first semiconductor die at least partially covers at least one contact pad.

13. A semiconductor package comprising:

a. a plurality of contact pads, wherein each of plurality of the contact pads comprises at least a first plated layer and a second plated layer;

b. a first semiconductor die having bond pads that is coupled to a first and a second contact pad of the plurality of contact pads by solder balls at the second plated layers of the first and the second contact pads; and

c. a resin encapsulant for encapsulating the first semiconductor die, the solder balls and top surfaces of the second plated layers of the first and the second contact pads such that bottom surfaces of the first plated layers of the first and the second contact pads are exposed exterior to the semiconductor package.

Assignments (3)
CORRECTIVE ASSIGNMENT TO ADD THE ANNEX A AND THE ANNEX B WHICH WAS INADVERTENTLY LEFTOUT IN THE ORIGINAL ASSIGNMENT DOCUMENT PREVIOUSLY RECORDED ON REEL 037959 FRAME 0937. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Jul 8, 2016
From: UTAC THAI LIMITED
To: UTAC HEADQUARTERS PTE. LTD.
Reel/Frame 039902/0302 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 1, 2016
From: UTAC THAI LIMITED
To: UTAC HEADQUARTERS PTE. LTD.
Reel/Frame 037959/0937 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 4, 2012
From: NONDHASITTHICHAI, SOMCHAI; SIRINORAKUL, SARAVUTH
To: UTAC THAI LIMITED
Reel/Frame 028895/0889 →
Continuity (3)
Division 11731522 · Mar 30, 2007
Provisional Application 60795929 · Apr 28, 2006
Related Publication 20130234307A1 · Sep 12, 2013