US4899185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density tape-automated bonding (TAB) of electronic components
Assignee: Eastman Kodak Co
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Filing: 1989-08-24
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Granted: 1990-02-06
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Expires: 2009-08-24
Abstract
Abstract A plurality of narrowly spaced electrodes of an electronic device are connected to a corresponding plurality of similarly spaced electrodes of another electronic device by two superimposed mutually separated layers of wires. The lower wires of the lower layer are bonded to outer bonding pads of alternate device electrodes that are located in a first row near the corresponding edges of the respective devices. Inner bonding pads of the other device electrodes are located in a second row further from the corresponding device edges between the outer pad electrodes and are bonded to the wires of the upper layer, the connecting ends of which extend beyond the corresponding ends of the lower wires.
Inventors
- 👤 David A. Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:13
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; H; H10; H10H; H10H29/00; H10H29/10; H10H29/14; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/688
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
An electronic assembly including two electronic devices provided with mutually corresponding, narrowly spaced, generally parallel first and second alternating electrodes provided with respective bonding pads, said bonding pads of said first electrodes of each device being aligned in a first row near one edge thereof and bonding pads of said second electrodes being aligned between said alternate electrodes in a second row farther from said edge, and, first and second superimposed mutually separated layers of spaced bonding wires, said wires of said first layer connecting said first electrodes of one of said devices to corresponding first electrodes of the other of said devices, said wires of said second layer being longer than said wires of said first layer and connecting said second electrodes of one of said devices to the corresponding second electrodes of the other of said devices.
Claim 2
Dependent Claim
139 words
An electronic assembly including two electronic devices provided with mutually corresponding, narrowly spaced, generally parallel first and second alternating electrodes provided with respective bonding pads, said bonding pads of said first electrodes of each device being aligned in a first row near one edge thereof and bonding pads of said second electrodes being aligned between said alternate electrodes in a second row farther from said edge, and, first and second superimposed mutually separated layers of spaced bonding wires, said wires of said first layer connecting said first electrodes of one of said devices to corresponding first electrodes of the other of said devices, said wires of said second layer being longer than said wires of said first layer and connecting said second electrodes of one of said devices to the corresponding second electrodes of the other of said devices.
Claim 3
Dependent Claim
21 words
The invention defined by claim 1 in which said layers of wires are supported and mutually insulated by plastic web material.
Claim 4
Dependent Claim
32 words
The invention defined by claim 1 in which said electronic assembly is a light-emitting diode printhead and said two electronic devices are respectively a light-emitting diode array chip and a driver chip.
Claim 5
Dependent Claim
22 words
The invention defined by claim 1 in which said bonding pad are wider than the spacing between said first and second electrodes.
Claim 6
Dependent Claim
29 words
The invention defined by claim 1 in which said rows are spaced apart by at least several times the spacing of adjacent bonding pads in either of said rows.
References Cited (Backward Citations)
US4797895A
Cited
US4803565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |