US6072700A
Expired / Lapsed
US
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Ball grid array package
Assignee: MagnaChip Semiconductor Ltd
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Filing: 1998-06-30
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Granted: 2000-06-06
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Expires: 2018-06-30
Abstract
Abstract A ball grid array package with an improved structure of aligning balls is disclosed. The BGA package comprises various elements such as a substrate and a semiconductor chip mounted in the substrate. The substrate has a first surface and a second surface which is positioned in a higher place than the first surface and is formed around the first surface. The semiconductor chip is arranged on the first surface, and has a plurality of pads for transferring signals, which is placed on the semiconductor chip. And At least one semiconductor chip is stacked so that the pads having an identical function on each layer are electrically connected to each other. The BGA package includes a plurality of leads which are mounted on the substrate and connected with a part of the pads of the semiconductor chip and exposed to the second surface. Furthermore, the BGA package of the present invention includes a plurality of conductive solder balls which are formed on the surface of the semiconductor chip and the second surface of the substrate, and electrically connected with the leads exposed to the second surface of the substrate and the pads of the semiconductor chip.
Inventors
- 👤 Teck Hown Nam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:12
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/18; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/153; H10W90/00; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/541; H10W72/5445; H10W72/547; H10W72/851; H10W72/874; H10W72/884; H10W90/20; H10W90/291; H10W90/701; H10W90/721; H10W90/724; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
183 words
A ball grid array package comprising: a substrate having a first surface and a second surface, which is positioned in a higher place than the first surface and which is formed around the first surface; a plurality of semiconductor chips, each of which has a plurality of pads thereon for transferring signals, said plurality of semiconductor chips having a first semiconductor chip, which is positioned on the first surface of the substrate, and a second semiconductor chip, which is located above the first semiconductor chip; a plurality of leads mounted on the substrate and having first ends, which are electrically connected to at least some of the pads of the first semiconductor chip, and second ends, which are exposed to the second surface of the substrate; a plurality of first conductive solder balls formed above a surface of the second semiconductor chip and electrically connected to at least some of the pads of the second semiconductor chip; and a plurality of second conductive solder balls formed on the second surface of the substrate and electrically connected to the second ends of the leads.
Claim 2
Dependent Claim
183 words
A ball grid array package comprising: a substrate having a first surface and a second surface, which is positioned in a higher place than the first surface and which is formed around the first surface; a plurality of semiconductor chips, each of which has a plurality of pads thereon for transferring signals, said plurality of semiconductor chips having a first semiconductor chip, which is positioned on the first surface of the substrate, and a second semiconductor chip, which is located above the first semiconductor chip; a plurality of leads mounted on the substrate and having first ends, which are electrically connected to at least some of the pads of the first semiconductor chip, and second ends, which are exposed to the second surface of the substrate; a plurality of first conductive solder balls formed above a surface of the second semiconductor chip and electrically connected to at least some of the pads of the second semiconductor chip; and a plurality of second conductive solder balls formed on the second surface of the substrate and electrically connected to the second ends of the leads.
Claim 3
Dependent Claim
58 words
The ball grid array package of claim 1, further comprising a compliant layer interposed between the second semiconductor chip and the first solder balls, said compliant layer including a conductive patterned layer, which connects the pads of the second semiconductor chip to each other, and a buffered layer, which reduces an external impact to the second semiconductor chip.
Claim 4
Dependent Claim
15 words
The ball grid array package of claim 2, wherein said buffered layer is an elastomer.
Claim 5
Dependent Claim
26 words
The ball grid array package of claim 1, wherein the pads of the first semiconductor chip are connected to the leads through a plurality of wires.
Claim 6
Dependent Claim
18 words
The ball grid array package of claim 4, wherein the wires are sealed with a cured liquid resin.
Claim 7
Dependent Claim
25 words
The ball grid array package of claim 1, wherein the first semiconductor chip is adhered to the first surface of the substrate by an adhesive.
Claim 8
Dependent Claim
30 words
The ball grid array package of claim 1, further comprising a first tape, a carrier film and a second tape stacked in order between the first and second semiconductor chips.
Claim 9
Dependent Claim
185 words
A ball grid array package comprising: a substrate having a first surface and a second surfaces which is positioned in a higher place than the first surface and which is formed around the first surface; a first semiconductor chip which is arranged on the first surface and which has a plurality of pads placed on an upper edge of the first semiconductor chip for transferring signals; a second semiconductor chip which is arranged on an upper face of the first semiconductor chip, which has a smaller size than the first semiconductor chip so as to expose the pads of the first semiconductor chip and which includes a plurality of pads thereon; a plurality of leads mounted on the substrate, electrically connected with the pads of the first semiconductor chip and exposed to the second surface; and a plurality of conductive solder balls which are formed on a surface of the second semiconductor chip and the second surface of the substrate and which are electrically connected with the leads exposed to the second surface of the substrate and with the pads of the second semiconductor chip.
Claim 10
Dependent Claim
185 words
A ball grid array package comprising: a substrate having a first surface and a second surfaces which is positioned in a higher place than the first surface and which is formed around the first surface; a first semiconductor chip which is arranged on the first surface and which has a plurality of pads placed on an upper edge of the first semiconductor chip for transferring signals; a second semiconductor chip which is arranged on an upper face of the first semiconductor chip, which has a smaller size than the first semiconductor chip so as to expose the pads of the first semiconductor chip and which includes a plurality of pads thereon; a plurality of leads mounted on the substrate, electrically connected with the pads of the first semiconductor chip and exposed to the second surface; and a plurality of conductive solder balls which are formed on a surface of the second semiconductor chip and the second surface of the substrate and which are electrically connected with the leads exposed to the second surface of the substrate and with the pads of the second semiconductor chip.
Claim 11
Dependent Claim
59 words
The ball grid array package of claim 8, further comprising a compliant layer which is interposed between the second semiconductor chip and the solder balls, said compliant layer including a conductive patterned layer, which connects said pads of the second semiconductor chip to each other, and a buffered layer, which reduces an external impact to the second semiconductor chip.
Claim 12
Dependent Claim
15 words
The ball grid array package of claim 8, wherein said buffered layer is an elastomer.
Claim 13
Dependent Claim
26 words
The ball grid array package of claim 8, wherein the pads of the first semiconductor chip are connected to the leads through a plurality of wires.
Claim 14
Dependent Claim
18 words
The ball grid array package of claim 11, wherein the wires are sealed with a cured liquid resin.
Claim 15
Dependent Claim
25 words
The ball grid array package of claim 8, wherein said first semiconductor chip is adhered to the first surface of the substrate by an adhesive.
Claim 16
Dependent Claim
30 words
The ball grid array package of claim 8, further comprising a first tape, a carrier film and a second tape stacked in order between the first and second semiconductor chips.
Claim 17
Dependent Claim
40 words
The ball grid array package of claim 8, wherein some of the solder balls are positioned on the surface of the second semiconductor chip; and wherein some of the solder balls are positioned on the second surface of the substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-06 | 2003-12-06 | 2004-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-06 | 2007-12-06 | 2008-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-06 | 2011-12-06 | 2012-06-06 | $7700.00 | Window Closed / Lapsed |