US6077382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting method of semiconductor chip
Assignee: Citizen Watch Co Ltd
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Filing: 1998-05-08
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Granted: 2000-06-20
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Expires: 2018-05-08
Abstract
Abstract The invention provides a mounting method for a semiconductor chip, wherein after disposing the anisotropic conductive adhesive on a circuit board, the circuit board is preheated to a temperature lower than the hardening temperature of the anisotropic conductive adhesive, the semiconductor chip is disposed on the circuit board thereafter, and the anisotropic conductive adhesive is hardened by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat so that generation of air bubbles is minimized ensuring good adhesion therebetween. It is also possible to prevent occurrence of thermal strain by heating simultaneously the under surface of the circuit board at a temperature lower than a heating temperature for the semiconductor chip.
Inventors
- 👤 Makoto Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:43
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/06; C08; C08L; C08L63/00; C09J2463/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13452; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; H10; H10W; H10W72/00; H10W72/01; H10W72/013; H10W72/01365; H10W72/071; H10W72/0711; H10W72/07141; H10W72/073; H10W72/07311; H10W72/07331; H10W72/30; H10W72/321; H10W72/325; H10W72/351; H10W72/352; H10W72/353; H10W72/354; H10W72/90; H10W72/941; H10W72/9415; H10W74/00; H10W74/10; H10W74/15; H10W90/00; H10W90/701; H10W90/721; H10W90/724; H10W90/731; H10W90/734; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of preheating the circuit board with the anisotropic conductive adhesive on the circuit board to a temperature lower than the hardening temperature of the anisotropic conductive adhesive; a step of disposing the semiconductor chip on the circuit board after the preheating step and after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip.
Claim 2
Independent Claim
135 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of preheating the circuit board with the anisotropic conductive adhesive on the circuit board to a temperature lower than the hardening temperature of the anisotropic conductive adhesive; a step of disposing the semiconductor chip on the circuit board after the preheating step and after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip.
Claim 3
Independent Claim
140 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of disposing the semiconductor chip on the circuit board after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip, and by simultaneously heating a surface of the circuit board opposite said thermosetting anisotropic conductive adhesive with the semiconductor chip disposed on the circuit board to a temperature lower than a temperature to which the semiconductor chip is heated.
Claim 4
Independent Claim
140 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of disposing the semiconductor chip on the circuit board after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip, and by simultaneously heating a surface of the circuit board opposite said thermosetting anisotropic conductive adhesive with the semiconductor chip disposed on the circuit board to a temperature lower than a temperature to which the semiconductor chip is heated.
Claim 5
Independent Claim
169 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of preheating the circuit board with the thermosetting anisotropic conductive adhesive disposed thereon to a temperature lower than the hardening temperature of the thermosetting anisotropic conductive adhesive; a step of disposing the semiconductor chip on the circuit board after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip, and by simultaneously heating a surface of the circuit board opposite said thermosetting anisotropic conductive adhesive with the semiconductor chip disposed on the circuit board to a temperature lower than a temperature to which the semiconductor chip is heated.
Claim 6
Independent Claim
169 words
A method for mounting a semiconductor chip provided with bump electrodes on a circuit board with wiring patterns formed thereon; said method for mounting the semiconductor chip comprising: a step of disposing a thermosetting anisotropic conductive adhesive on the circuit board; a step of preheating the circuit board with the thermosetting anisotropic conductive adhesive disposed thereon to a temperature lower than the hardening temperature of the thermosetting anisotropic conductive adhesive; a step of disposing the semiconductor chip on the circuit board after aligning the bump electrodes of the semiconductor chip with the wiring patterns formed on the circuit board; and a step of hardening the thermosetting anisotropic conductive adhesive by thermally press-bonding the semiconductor chip onto the circuit board by applying pressure as well as heat to said semiconductor chip, and by simultaneously heating a surface of the circuit board opposite said thermosetting anisotropic conductive adhesive with the semiconductor chip disposed on the circuit board to a temperature lower than a temperature to which the semiconductor chip is heated.
References Cited (Backward Citations)
US4749120A
Cited
US5843251A
Cited
US5148266A
Cited
US5232532A
Cited
US5283947A
Cited
JPH0766225A
Cited
US5628111A
Cited
US5802712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-20 | 2003-12-20 | 2004-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-20 | 2007-12-20 | 2008-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-20 | 2011-12-20 | 2012-06-20 | $7700.00 | Window Closed / Lapsed |