US6150193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RF shielded device
Assignee: Amkor Technology Singapore Holding Pte Ltd
•
Filing: 1998-05-22
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Granted: 2000-11-21
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Expires: 2018-05-22
Abstract
Abstract A shielded package for an IC chip having bond pads thereon includes an insulating substrate having metallizations formed on a surface of the substrate. The IC chip is mounted to the substrate surface and the IC chip bonding pads are electrically coupled to corresponding substrate metallizations. An insulating encapsulant layer encapsulates the IC chip and the substrate surface. A conductive shield layer comprising a cured flowable electrically conductive material is formed above the encapsulant layer. The encapsulant layer electrically isolates the shield layer from the IC chip and the various electrical conductors (e.g. bonding pads, bond wires, contacts and metallizations). The shield layer, being an electrically conductive material, forms a floating ground plane which shields the IC chip and the remainder of the package. Thus, the shield layer prevents external radiation form interfering with the operation of the package and also prevents the package from emitting radiation which could interfere with other electronic components and devices.
Inventors
- 👤 Thomas P. Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:25
CPC Classifications
H; H10; H10W; H10W42/00; H10W42/20; H10W42/261; H10W42/276; H10W74/00; H10W74/01; H10W74/014; H10W74/10; H10W74/111; H10W74/114; H10W74/117; H10W72/00; H10W72/01; H10W72/0198; H10W72/50; H10W72/541; H10W72/5445; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W72/851; H10W72/874; H10W72/884; H10W72/90; H10W72/941; H10W72/9415; H10W74/15; H10W90/00; H10W90/701; H10W90/721; H10W90/724; H10W90/731; H10W90/734; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
124 words
A method of forming a plurality of electronic device packages from an insulating substrate, said method comprising the steps of: providing said insulating substrate which has sections; mounting an electronic device in each of said sections; encapsulating said electronic devices and a first surface of said insulating substrate with an insulating encapsulant layer; applying a conductive shield layer above said encapsulant layer; and cutting said encapsulant layer, said shield layer forming a dam on said first surface of said insulating substrate around a perimeter of said insulating substrate wherein said step of encapsulating comprises partially filling a pocket defined by said dam with encapsulant; and said insulating substrate along a periphery of each of said sections to form said plurality of electronic device packages.
Claim 2
Independent Claim
124 words
A method of forming a plurality of electronic device packages from an insulating substrate, said method comprising the steps of: providing said insulating substrate which has sections; mounting an electronic device in each of said sections; encapsulating said electronic devices and a first surface of said insulating substrate with an insulating encapsulant layer; applying a conductive shield layer above said encapsulant layer; and cutting said encapsulant layer, said shield layer forming a dam on said first surface of said insulating substrate around a perimeter of said insulating substrate wherein said step of encapsulating comprises partially filling a pocket defined by said dam with encapsulant; and said insulating substrate along a periphery of each of said sections to form said plurality of electronic device packages.
Claim 3
Dependent Claim
22 words
The method of claim 1 further comprising the step of embedding heat slugs into said encapsulant layer over each of said sections.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said step of forming a dam comprises the step of applying encapsulant around said perimeter of said insulating substrate.
Claim 5
Dependent Claim
17 words
The method of claim 3 wherein said step of applying encapsulant is performed with a needle dispenser.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein said step of applying a conductive shield layer comprises further filling said pocket with a flowable electrically conductive material.
Claim 7
Dependent Claim
85 words
The method of claim 1 wherein said electronic devices have first surfaces with bonding pads thereon and said first surface of said insulating substrate has metallizations thereon, second surfaces of said electronic devices being attached to said first surface of said insulating substrate, said method further comprising the step of wirebonding said bonding pads to corresponding ones of said metallizations with bond wires, wherein said step of encapsulating further comprises encapsulating said bonding pads, said bond wires and said metallizations in said insulating encapsulant layer.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said electronic devices are mounted in each of said sections by flip-chip interconnections.
Claim 9
Dependent Claim
70 words
The method of claim 1 wherein said step of providing further comprises providing metallizations on said first surface of said insulating substrate, said metallizations being electrically connected to one another, and wherein said electronic devices have first surfaces with bonding pads thereon, said method further comprising the steps of: electrically connecting said bonding pads to corresponding ones of said metallizations; and electrically connecting said metallizations to an external reference voltage.
Claim 10
Dependent Claim
16 words
The method of claim 8 wherein said cutting step electrically disconnects said metallizations from one another.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein said encapsulant layer comprises an electrically insulating thermally conductive filler.
Claim 12
Independent Claim
204 words
A method of forming a plurality of electronic device packages from an insulating substrate, said method comprising the steps of: providing said insulating substrate, said insulating substrate having sections and an internal ground plane, each of said sections having at least one ground contact, each of said sections comprising a first portion inward of said at least one ground contact and a second portion on which said at least one ground contact is located, each of said at least one ground contact being electrically connected to said internal ground plane; mounting an electronic device in each of said first portions; enclosing said electronic devices and said first portions in insulating caps; enclosing said insulating caps, said second portions and said ground contacts in a conductive shield layer; forming a dam on said first surface of said insulating substrate around a perimeter of said insulating substrate wherein said step of enclosing said insulating caps, said second portion and said ground contacts in a conductive shield layer comprises filling a pocket defined by said dam with a flowable electrically conductive material; and cutting said shield layer and said insulating substrate along a periphery of each of said sections to form said plurality of electronic device packages.
Claim 13
Independent Claim
204 words
A method of forming a plurality of electronic device packages from an insulating substrate, said method comprising the steps of: providing said insulating substrate, said insulating substrate having sections and an internal ground plane, each of said sections having at least one ground contact, each of said sections comprising a first portion inward of said at least one ground contact and a second portion on which said at least one ground contact is located, each of said at least one ground contact being electrically connected to said internal ground plane; mounting an electronic device in each of said first portions; enclosing said electronic devices and said first portions in insulating caps; enclosing said insulating caps, said second portions and said ground contacts in a conductive shield layer; forming a dam on said first surface of said insulating substrate around a perimeter of said insulating substrate wherein said step of enclosing said insulating caps, said second portion and said ground contacts in a conductive shield layer comprises filling a pocket defined by said dam with a flowable electrically conductive material; and cutting said shield layer and said insulating substrate along a periphery of each of said sections to form said plurality of electronic device packages.
Claim 14
Dependent Claim
30 words
The method of claim 11 wherein said step of enclosing said electronic devices and said first portions in insulating caps further comprises the step of applying a medium viscosity encapsulant.
Claim 15
Dependent Claim
20 words
The method of claim 12 wherein said step of applying a medium viscosity encapsulant is performed with a needle dispenser.
Claim 16
Dependent Claim
54 words
The method of claim 12 wherein said step of applying a medium viscosity encapsulant comprises applying said medium viscosity encapsulant to said first portions of said sections, said medium viscosity encapsulant having a viscosity sufficient to prevent said medium viscosity encapsulant from flowing from said first portions to said second portions of said sections.
Claim 17
Dependent Claim
48 words
The method of claim 12 wherein said step of applying a medium viscosity encapsulant comprises applying said medium viscosity encapsulant to said first portions of said sections, said medium viscosity encapsulant having a viscosity sufficient to confine said medium viscosity encapsulant to said first portions of said sections.
Claim 18
Dependent Claim
70 words
The method of claim 1 wherein said step of providing further comprises providing metallizations on said first surface of said insulating substrate, said metallizations being electrically connected to one another, and wherein said electronic devices have first surfaces with bonding pad thereon, said method further comprising the steps of: electrically connected said bonding pads to corresponding ones of said metallizations; and electrically connecting said metallizations to an external reference voltage.
Claim 19
Dependent Claim
16 words
The method of claim 16 wherein said cutting step electrically disconnects said metallizations from one another.
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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) | 2003-11-21 | 2004-05-22 | 2004-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-21 | 2008-05-22 | 2008-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-21 | 2012-05-22 | 2012-11-21 | $7700.00 | Window Closed / Lapsed |