US5847456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device
Assignee: Renesas Electronics Corp
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Filing: 1997-02-18
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Granted: 1998-12-08
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Expires: 2017-02-18
Abstract
Abstract Solder bumps (3) are provided with reinforcing resins (4), which are formed by applying resins thickly at the roots and gradually thinly toward the tips so as to surround the bumps. Thus, long-time reliability of solder connection parts is improved and repairability is simultaneously improved.
Inventors
- 👤 Kazutaka Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:28
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/01; H10D64/011; H10W; H10W72/00; H10W72/01; H10W72/012; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3431; H05K3/3436; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10954; H05K2201/10977; H10W72/071; H10W72/072; H10W72/07251; H10W72/20; H10W72/251; H10W72/281; H10W72/283; H10W72/90; H10W72/941; H10W72/944; H10W72/9445; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A semiconductor device comprising a semiconductor substrate in which a wiring pattern is formed, said wiring pattern having terminal pads; solder bumps bonded at their roots to said terminal pads, said solder bonds being at least partially deformed at the contact area between said solder bump and said terminal pad, thereby providing a relatively flat surface area; and an electrically non-conductive resin applied to the solder bumps, said resin being applied relatively thickly at the roots of the solder bumps, and tapering relatively thinly toward the tips of the solder bumps.
Claim 2
Dependent Claim
91 words
A semiconductor device comprising a semiconductor substrate in which a wiring pattern is formed, said wiring pattern having terminal pads; solder bumps bonded at their roots to said terminal pads, said solder bonds being at least partially deformed at the contact area between said solder bump and said terminal pad, thereby providing a relatively flat surface area; and an electrically non-conductive resin applied to the solder bumps, said resin being applied relatively thickly at the roots of the solder bumps, and tapering relatively thinly toward the tips of the solder bumps.
Claim 3
Dependent Claim
14 words
A semiconductor device as claimed in claim 1, wherein said resins are thermosetting resins.
Claim 4
Dependent Claim
14 words
A semiconductor device as claimed in claim 1, wherein said resins are thermoplastic resins.
Claim 5
Dependent Claim
54 words
A semiconductor device as claimed in claim 1, wherein said semiconductor device includes a semiconductor chip having electrode pads on the surface and an insulated film layer containing a wiring pattern, and wherein said solder bumps are attached to said wiring pattern and a cover coat film covers a portion of said wiring pattern.
Claim 6
Dependent Claim
16 words
A semiconductor device of claim 2 wherein said thermosetting resins are epoxy resins or polyimide resins.
Claim 7
Dependent Claim
13 words
A semiconductor device of claim 3 wherein said thermoplastic resins are fluorinated resins.
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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) | 2001-12-07 | 2002-06-08 | 2002-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-07 | 2006-06-08 | 2006-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-07 | 2010-06-08 | 2010-12-08 | $7700.00 | Window Closed / Lapsed |