Patent US6777819B2 successfully refreshed from Google Patents.
US6777819B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor package with flash-proof device
Assignee: Siliconware Precision Industries Co Ltd
•
Filing: 2001-10-23
•
Granted: 2004-08-17
•
Expires: 2021-10-23
Abstract
Abstract A semiconductor package with a flash-proof device is proposed, in which at least one chip and at least one passive device mounted on a substrate are covered by a flash-proof device dimensionally designed for positioning the substrate in a conventional mold and preventing a molding resin from flashing on the substrate in a molding process, and thus quality of the fabricated package can be assured. Due to no need of a specifically designed mold, fabrication costs are reduced. Furthermore, the flash-proof device has its top side exposed to outside of an encapsulant formed in the molding process, thereby allowing heat dissipating efficiency to be improved. Moreover, the flash-proof device provides shielding for the chip and the passive device received therein, so that external electromagnetic interference with performance of the semiconductor package can be reduced.
Inventors
- 👤 Chien-Ping Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:10
CPC Classifications
H; H05; H05K; H05K5/00; H05K5/0091; H05K5/0095; H10; H10W; H10W42/00; H10W42/20; H10W74/00; H10W74/01; H10W74/016; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/851; H10W72/874; H10W72/884; H10W90/00; H10W90/701; H10W90/731; H10W90/734; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
229 words
A semiconductor package, comprising: a substrate having a first side for disposing a plurality of conductive traces thereon, and a second side for forming a plurality of electrical connection terminals thereon; at least one chip attached to the first side of the substrate and electrically connected to the conductive traces; at least one passive device attached to the first side of the substrate and electrically connected to the conductive traces; a flash-proof device attached to the first side of the substrate and formed with a cavity for receiving the chip and the passive device therein, wherein a distance in elevation from a top side of the flash-proof device to the first side of the substrate is made to be slightly greater than a depth of a molding cavity of a mold used in a molding process, and the flash-proof device has an outer sidewall aligned with a side edge of the substrate; and an encapsulant formed by a molding compound for encapsulating the chip, the passive device, the flash-proof device and the substrate, wherein the second side of the substrate is exposed to outside of the encapsulant; wherein by the elevation-to-depth arrangement of the flash-proof device and the molding cavity, the top side of the flash-proof device is exposed to outside of the encapsulant, and the second side of the substrate is free of flash of the molding compound.
Claim 2
Dependent Claim
229 words
A semiconductor package, comprising: a substrate having a first side for disposing a plurality of conductive traces thereon, and a second side for forming a plurality of electrical connection terminals thereon; at least one chip attached to the first side of the substrate and electrically connected to the conductive traces; at least one passive device attached to the first side of the substrate and electrically connected to the conductive traces; a flash-proof device attached to the first side of the substrate and formed with a cavity for receiving the chip and the passive device therein, wherein a distance in elevation from a top side of the flash-proof device to the first side of the substrate is made to be slightly greater than a depth of a molding cavity of a mold used in a molding process, and the flash-proof device has an outer sidewall aligned with a side edge of the substrate; and an encapsulant formed by a molding compound for encapsulating the chip, the passive device, the flash-proof device and the substrate, wherein the second side of the substrate is exposed to outside of the encapsulant; wherein by the elevation-to-depth arrangement of the flash-proof device and the molding cavity, the top side of the flash-proof device is exposed to outside of the encapsulant, and the second side of the substrate is free of flash of the molding compound.
Claim 3
Dependent Claim
20 words
The semiconductor package of claim 1 , wherein the flash-proof device is attached to the substrate by an elastic adhesive.
Claim 4
Dependent Claim
21 words
The semiconductor package of claim 1 , wherein the flash-proof device is attached to the substrate by a thermally conductive adhesive.
Claim 5
Dependent Claim
32 words
The semiconductor package of claim 1 , wherein the flash-proof device is further formed with a plurality of vias, which allow a molding compound used for forming the encapsulant to flow therethrough.
Claim 6
Dependent Claim
25 words
The semiconductor package of claim 1 , wherein a plurality of step-like recesses are formed on edges of the top side of the flash-proof device.
Claim 7
Dependent Claim
24 words
The semiconductor package of claim 1 , wherein the flash-proof device has an outer sidewall thereof adjacent to a side edge of the substrate.
Claim 8
Dependent Claim
41 words
The semiconductor package of claim 1 , wherein a plurality of ground traces are formed on the conductive traces at positions corresponding to the flash-proof device, for attaching the flash-proof device to the ground traces by using an electrically conductive adhesive.
References Cited (Backward Citations)
US5530295A
Cited
US5812570A
Cited
US6069027A
Cited
US6294831B1
Cited
US6392900B1
Cited
US6191360B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-08-17 | 2008-02-16 | 2008-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-08-17 | 2012-02-16 | 2012-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-08-17 | 2016-02-16 | 2016-08-17 | $7700.00 | Window Closed / Lapsed |