Patent US6507114B2 successfully refreshed from Google Patents.
US6507114B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
BOC semiconductor package including a semiconductor die and a substrate bonded circuit side down to the die
Assignee: Round Rock Research LLC
•
Filing: 2001-01-30
•
Granted: 2003-01-14
•
Expires: 2021-01-30
Abstract
Abstract A BOC (board-on-chip) semiconductor package includes a semiconductor die having die contacts, a substrate bonded circuit side down to the die, and an adhesive layer bonding the substrate to the die. The substrate includes a circuit side having a pattern of conductors and wire bonding sites, and a back side having an array of external contacts (e.g., BGA solder balls) in electrical communication with the conductors. The bonding sites on the conductors overhang the peripheral edges of the substrate such that access is provided for bonding wires to the bonding sites and to the die contacts. Because the substrate is bonded circuit side down to the die, a loop height of the wires, and an overall height (profile) of the package are reduced by a thickness of the substrate. In addition, a planarity of molded segments that encapsulate the wires is improved, and mold bleed during molding of the molded segments is reduced. A method for fabricating the BOC package includes the steps of: providing the die with the die contacts, providing the substrate with the conductors and the overhanging wire bonding sites on the circuit side and external contacts on the back side, bonding the substrate circuit side down to the die, wire bonding the wires to the wire bonding sites and to the die contacts, and then forming the molded segments to encapsulate the wires.
Inventors
- 👤 Chong Chin Hui
- 👤 Lee Choon Kuan
- 👤 Lee Kian Chai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:15
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/62; H10W70/63; H10W70/635; H10W74/00; H10W74/10; H10W74/111; H10W74/129; H10W90/00; H10W90/701; H10W72/00; H10W72/071; H10W72/075; H10W72/50; H10W72/551; H10W72/552; H10W72/5524; H10W72/90; H10W72/951
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
107 words
A semiconductor package comprising: a semiconductor die; a substrate having a first side, an opposing second side and a peripheral edge, the substrate comprising a plurality of conductors on the first side and bonding sites comprising portions of the conductors overhanging the peripheral edge, and a plurality of external contacts on the second side in electrical communication with the conductors; an adhesive layer in contact with the die, the first side and the conductors, bonding the die to the substrate and supporting the portions; a plurality of wires bonded to the die and to the bonding sites; and a molded segment on the die encapsulating the wires.
Claim 2
Dependent Claim
107 words
A semiconductor package comprising: a semiconductor die; a substrate having a first side, an opposing second side and a peripheral edge, the substrate comprising a plurality of conductors on the first side and bonding sites comprising portions of the conductors overhanging the peripheral edge, and a plurality of external contacts on the second side in electrical communication with the conductors; an adhesive layer in contact with the die, the first side and the conductors, bonding the die to the substrate and supporting the portions; a plurality of wires bonded to the die and to the bonding sites; and a molded segment on the die encapsulating the wires.
Claim 3
Dependent Claim
27 words
The package of claim 1 wherein the conductors comprise outer surfaces in contact with the adhesive layer and the bonding sites comprise inner surfaces of the conductors.
Claim 4
Dependent Claim
16 words
The package of claim 1 further comprising an encapsulant molded to the die and the substrate.
Claim 5
Dependent Claim
104 words
A semiconductor package comprising: a semiconductor die; a substrate having a first side, an opposing second side and an edge, the substrate comprising a plurality of conductors on the first side having portions thereof overhanging the edge, and a plurality of external contacts on the second side in electrical communication with the conductors, the substrate attached to the die with the first side facing towards the die and the second side facing away from the die; an adhesive layer bonded to the first side, to the conductors and to the die; and a plurality of wires bonded to the portions and to the die.
Claim 6
Dependent Claim
104 words
A semiconductor package comprising: a semiconductor die; a substrate having a first side, an opposing second side and an edge, the substrate comprising a plurality of conductors on the first side having portions thereof overhanging the edge, and a plurality of external contacts on the second side in electrical communication with the conductors, the substrate attached to the die with the first side facing towards the die and the second side facing away from the die; an adhesive layer bonded to the first side, to the conductors and to the die; and a plurality of wires bonded to the portions and to the die.
Claim 7
Dependent Claim
23 words
The package of claim 4 further comprising an encapsulant molded to the die and to the substrate encapsulating the wires and the portions.
Claim 8
Dependent Claim
17 words
The package of claim 4 wherein the external contacts comprise balls or bumps in a grid array.
Claim 9
Dependent Claim
11 words
The package of claim 4 wherein the adhesive layer comprises tape.
Claim 10
Dependent Claim
20 words
The package of claim 4 further comprising a mask on the second side having openings aligned with the external contacts.
Claim 11
Dependent Claim
23 words
The package of claim 4 further comprising a plurality of conductive vias in the substrate electrically connecting the external contacts and the conductors.
Claim 12
Dependent Claim
84 words
A semiconductor package comprising: a semiconductor die comprising a plurality of die contacts; a substrate attached to the die having a thickness and a circuit side bonded to the die; a plurality of conductors on the circuit side having surfaces bonded to the substrate and portions overhanging the substrate forming bonding sites; an adhesive layer in contact with the die, the circuit side and the surfaces of the conductors; and a plurality of wires bonded to the die contacts and to the bonding sites.
Claim 13
Dependent Claim
84 words
A semiconductor package comprising: a semiconductor die comprising a plurality of die contacts; a substrate attached to the die having a thickness and a circuit side bonded to the die; a plurality of conductors on the circuit side having surfaces bonded to the substrate and portions overhanging the substrate forming bonding sites; an adhesive layer in contact with the die, the circuit side and the surfaces of the conductors; and a plurality of wires bonded to the die contacts and to the bonding sites.
Claim 14
Dependent Claim
25 words
The package of claim 10 wherein the substrate has a peripheral edge and the bonding sites comprise portions of the conductors overhanging the peripheral edge.
Claim 15
Dependent Claim
21 words
The package of claim 10 further comprising a plurality of external contacts on the substrate in electrical communication with the conductors.
Claim 16
Dependent Claim
15 words
The package of claim 10 wherein the substrate comprises a polymer resin and glass fibers.
Claim 17
Dependent Claim
22 words
The package of claim 10 wherein the substrate comprises a material selected from the group consisting of bismaleimide-trizine (BT), epoxy, and polyimide.
Claim 18
Dependent Claim
118 words
A semiconductor package comprising: a semiconductor die having a circuit side and a plurality of die contacts on the circuit side; a substrate having a first side, an opposing second side and an edge, the substrate comprising a plurality of conductors on the first side having bonding sites thereon overhanging the edge, and a plurality of external contacts on the second side in electrical communication with the conductors, the substrate bonded to the die with the first side facing the circuit side; an adhesive layer in contact with the circuit side, the first side, the conductors and the bonding sites; and a plurality of wires bonded to the bonding sites on the conductors and to the die contacts.
Claim 19
Dependent Claim
118 words
A semiconductor package comprising: a semiconductor die having a circuit side and a plurality of die contacts on the circuit side; a substrate having a first side, an opposing second side and an edge, the substrate comprising a plurality of conductors on the first side having bonding sites thereon overhanging the edge, and a plurality of external contacts on the second side in electrical communication with the conductors, the substrate bonded to the die with the first side facing the circuit side; an adhesive layer in contact with the circuit side, the first side, the conductors and the bonding sites; and a plurality of wires bonded to the bonding sites on the conductors and to the die contacts.
Claim 20
Dependent Claim
22 words
The package of claim 15 further comprising a plurality of external contacts on the second side in electrical communication with the conductors.
Claim 21
Dependent Claim
18 words
The package of claim 15 wherein the bonding sites comprises outer surfaces in contact with the adhesive layer.
Claim 22
Dependent Claim
19 words
The package of claim 15 further comprising a molded segment on the die and the substrate encapsulating the wires.
Claim 23
Dependent Claim
13 words
The package of claim 15 wherein the adhesive layer comprises a cured polymer.
Claim 24
Dependent Claim
119 words
A board-on-chip semiconductor package comprising: a semiconductor die comprising a plurality of die contacts; a substrate attached to the die having a circuit side, a back side and a peripheral edge; a plurality of conductors on the circuit side and a plurality of bonding sites comprising portions of the conductors extending from the peripheral edge; a plurality of external contacts on the back side in electrical communication with the conductors; an adhesive layer in contact with the circuit side, the conductors and the die, and attaching the substrate to the die; a plurality of wires bonded to the die contacts and to the bonding sites; and an encapsulant molded to the die and to the substrate covering the wires.
Claim 25
Dependent Claim
119 words
A board-on-chip semiconductor package comprising: a semiconductor die comprising a plurality of die contacts; a substrate attached to the die having a circuit side, a back side and a peripheral edge; a plurality of conductors on the circuit side and a plurality of bonding sites comprising portions of the conductors extending from the peripheral edge; a plurality of external contacts on the back side in electrical communication with the conductors; an adhesive layer in contact with the circuit side, the conductors and the die, and attaching the substrate to the die; a plurality of wires bonded to the die contacts and to the bonding sites; and an encapsulant molded to the die and to the substrate covering the wires.
Claim 26
Dependent Claim
30 words
The package of claim 20 wherein the adhesive layer has a peripheral shape larger than that of the substrate such that the bonding sites are supported by the adhesive layer.
Claim 27
Dependent Claim
25 words
The package of claim 20 further comprising a plurality of conductive vias in the substrate in electrical communication with the external contacts and the conductors.
Claim 28
Dependent Claim
14 words
The package of claim 20 wherein the bonding sites comprise plating on the portions.
Claim 29
Dependent Claim
22 words
The package of claim 20 further comprising a mask on the back side of the substrate having openings for the external contacts.
Claim 30
Dependent Claim
17 words
The package of claim 20 wherein the external contacts comprise balls or bumps in a grid array.
Claim 31
Dependent Claim
22 words
The package of claim 20 wherein the substrate comprises a material selected from the group consisting of bismaleimide-trizine (BT), epoxy, and polyimide.
Claim 32
Dependent Claim
17 words
The package of claim 20 wherein the adhesive layer comprises a polymer tape or a cured polymer.
Claim 33
Dependent Claim
99 words
An electronic assembly comprising: a substrate comprising a plurality of electrodes; at least one semiconductor package on the substrate comprising: a semiconductor die; a board having a first side, an opposing second side and a peripheral edge; a plurality of conductors on the first side having portions thereof overhanging the peripheral edge; a plurality of external contacts on the second side in electrical communication with the conductors and bonded to the electrodes; an adhesive layer in contact with the die, the conductors and the first side; and a plurality of wires bonded to the portions and to the die.
Claim 34
Dependent Claim
99 words
An electronic assembly comprising: a substrate comprising a plurality of electrodes; at least one semiconductor package on the substrate comprising: a semiconductor die; a board having a first side, an opposing second side and a peripheral edge; a plurality of conductors on the first side having portions thereof overhanging the peripheral edge; a plurality of external contacts on the second side in electrical communication with the conductors and bonded to the electrodes; an adhesive layer in contact with the die, the conductors and the first side; and a plurality of wires bonded to the portions and to the die.
Claim 35
Dependent Claim
15 words
The assembly of claim 28 wherein the package is flip chip mounted to the substrate.
Claim 36
Dependent Claim
13 words
The assembly of claim 28 wherein the assembly comprises a multi chip module.
Claim 37
Dependent Claim
15 words
The assembly of claim 28 wherein the package further comprises an encapsulant encapsulating the wires.
Claim 38
Dependent Claim
17 words
The assembly of claim 28 wherein the external contacts comprise balls or bumps in a grid array.
Claim 39
Dependent Claim
16 words
The assembly of claim 28 wherein the adhesive layer comprises a tape or a cured polymer.
Claim 40
Dependent Claim
16 words
The assembly of claim 28 wherein the package further comprises a mask on the second side.
Claim 41
Dependent Claim
26 words
The assembly of claim 28 wherein the package further comprises a plurality of conductive vias in the board electrically connecting the external contacts and the conductors.
References Cited (Backward Citations)
JPH0951051A
Cited
US6177725B1
Cited
US6013948A
Cited
WO1997035342A1
Cited
US5866949A
Cited
US6150194A
Cited
US6040621A
Cited
US6097087A
Cited
JPH11163196A
Cited
US6049129A
Cited
US6087203A
Cited
US5956233A
Cited
US6300231B1
Cited
US6020629A
Cited
US6091140A
Cited
US6048755A
Cited
US6245598B1
Cited
US6122171A
Cited
US6118179A
Cited
US6291884B1
Cited
US6384487B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-01-13 | 2006-07-15 | 2007-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-01-13 | 2010-07-15 | 2011-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-01-13 | 2014-07-15 | 2015-01-14 | $7700.00 | Window Closed / Lapsed |