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US6794749B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Chip package with grease heat sink

Assignee: Micron Technology Inc
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Filing: 2002-02-26
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Granted: 2004-09-21
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Expires: 2022-02-26
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Abstract

Abstract The present invention relates to enhanced protection of the active surface and the bond wires or ball array of a microelectronic device, and to thermal management of the microelectronic device as it is package with a printed circuit board (PCB) or other substrate. The enhanced protection and thermal management are accomplished with a high-temperature thermal grease that is glob topped or encapsulated over the bond wires or ball array, and the active surface of the microelectronic device. The high-temperature thermal grease exchanges heat, particularly by conduction, away from the active surface of the microelectronic device as well as away from the bond wires.

Inventors

  • 👤 Salman Akram

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 10:57
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; H10W40/00; H10W40/20; H10W40/22; H10W40/25; H10W40/251; H10W40/70; H10W40/77; H10W40/778; H10W72/00; H10W72/30; H10W74/00; H10W74/01; H10W74/012; H10W74/10; H10W74/111; H10W74/114; H10W74/117; H10W74/129; H10W74/15; H10W90/00; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W72/071; H10W72/073; H10W72/07331; H10W72/20; H10W72/29; H10W72/851; H10W72/853; H10W72/856; H10W72/90; H10W72/941; H10W72/944; H10W72/9445; H10W74/131; H10W74/142; H10W90/20; H10W90/22; H10W90/288; H10W90/291; H10W90/701; H10W90/721; H10W90/722; H10W90/724; H10W90/731; H10W90/732; H10W90/734; H10W90/751; H10W90/754

Claims Analysis

Total Claims: 23
Claim 1
Independent Claim 68 words
An integrated circuit (IC) chip package, comprising: a substrate with an IC chip mounted thereon, wherein the IC chip has an active surface; a grease in contact with the active surface of the IC chip; and a container disposed upon the substrate, wherein the grease is enclosed within the container and the substrate, and wherein the container is in contact with the active surface of the IC chip.
Claim 2
Dependent Claim 68 words
An integrated circuit (IC) chip package, comprising: a substrate with an IC chip mounted thereon, wherein the IC chip has an active surface; a grease in contact with the active surface of the IC chip; and a container disposed upon the substrate, wherein the grease is enclosed within the container and the substrate, and wherein the container is in contact with the active surface of the IC chip.
Claim 3
Dependent Claim 22 words
An IC chip package as defined in claim 1 , wherein the IC chip is a flip chip on a flex substrate.
Claim 4
Dependent Claim 25 words
An IC chip package as defined in claim 1 , wherein: the IC chip is a flip chip; and the substrate is a flex substrate.
Claim 5
Dependent Claim 24 words
An IC chip package as defined in claim 3 , wherein the container comprises a dam structure that secures the container to the substrate.
Claim 6
Dependent Claim 28 words
An IC chip package as defined in claim 1 , wherein the grease has a thermal conductivity in a range from about 2 Watts/m·K to about 5 Watts/m·K.
Claim 7
Dependent Claim 28 words
An IC chip package as defined in claim 1 , wherein the grease has a dielectric constant in a range from less than about 6 to about 9.
Claim 8
Dependent Claim 28 words
An IC chip package as defined in claim 1 , wherein the grease has a melting point in a range from about 190° C. to about 220° C.
Claim 9
Dependent Claim 29 words
An IC chip package as defined in claim 1 , wherein the grease has a weight loss at about 100° C. after 30 days of less than about 0.15%.
Claim 10
Dependent Claim 112 words
An integrated circuit (IC) chip package with IC chip elements having an IC chip with an active surface, the active surface having extending therefrom an electrical connector in electrical communication with the IC chip, the IC chip being mounted upon a substrate, the IC chip package comprising: a grease in contact with the active surface of the IC chip; and a container disposed upon the substrate and enclosing a volume external to the IC chip elements, wherein the grease is enclosed within the container and the substrate, and wherein the grease fills the volume enclosed by the container and the container is in contact with the active surface of the IC chip.
Claim 11
Dependent Claim 112 words
An integrated circuit (IC) chip package with IC chip elements having an IC chip with an active surface, the active surface having extending therefrom an electrical connector in electrical communication with the IC chip, the IC chip being mounted upon a substrate, the IC chip package comprising: a grease in contact with the active surface of the IC chip; and a container disposed upon the substrate and enclosing a volume external to the IC chip elements, wherein the grease is enclosed within the container and the substrate, and wherein the grease fills the volume enclosed by the container and the container is in contact with the active surface of the IC chip.
Claim 12
Dependent Claim 20 words
An IC chip package as defined in claim 9 , wherein the grease is in contact with a dam structure.
Claim 13
Dependent Claim 16 words
An IC chip package as defined in claim 9 , wherein the grease contacts the container.
Claim 14
Dependent Claim 28 words
An IC chip package as defined in claim 9 , wherein the grease has a thermal conductivity in a range from about 2 Watts/m·K to about 5 Watts/m·K.
Claim 15
Dependent Claim 28 words
An IC chip package as defined in claim 9 , wherein the grease has a dielectric constant in a range from less than about 6 to about 9.
Claim 16
Dependent Claim 28 words
An IC chip package as defined in claim 9 , wherein the grease has a melting point in a range from about 190° C. to about 220° C.
Claim 17
Dependent Claim 29 words
An IC chip package as defined in claim 9 , wherein the grease has a weight loss at about 100° C. after 30 days of less than about 0.15%.
Claim 18
Dependent Claim 27 words
An IC chip package as defined in claim 9 , wherein the container makes contact with the substrate to enclose the active surface of the IC chip.
Claim 19
Dependent Claim 22 words
An IC chip package as defined in claim 9 , wherein the IC chip is a flip chip on a flex substrate.
Claim 20
Dependent Claim 25 words
An IC chip package as defined in claim 9 , wherein: the IC chip is a flip chip; and the substrate is a flex substrate.
Claim 21
Dependent Claim 24 words
An IC chip package as defined in claim 18 , wherein the container is a dam structure that secures the container to the substrate.
Claim 22
Dependent Claim 156 words
An IC chip package with IC chip elements having an IC chip with an active surface, the active surface having an electrical connector extending therefrom in electrical communication with the IC chip, the IC chip being mounted upon a substrate, the IC chip package comprising: a grease in contact with the active surface of the IC chip, the grease having: a thermal conductivity in a range from about 2 Watts/m·K to about 5 Watts/m·K; a dielectric constant in a range from less than about 6 to about 9; and a melting point in a range from about 190° C. to about 220° C.; and a container disposed upon the substrate, the container enclosing a volume external to the IC chip elements, wherein the grease is enclosed within the container and the substrate, and the grease fills the volume enclosed by the container and the container is in contact with the active surface of the IC chip.
Claim 23
Dependent Claim 156 words
An IC chip package with IC chip elements having an IC chip with an active surface, the active surface having an electrical connector extending therefrom in electrical communication with the IC chip, the IC chip being mounted upon a substrate, the IC chip package comprising: a grease in contact with the active surface of the IC chip, the grease having: a thermal conductivity in a range from about 2 Watts/m·K to about 5 Watts/m·K; a dielectric constant in a range from less than about 6 to about 9; and a melting point in a range from about 190° C. to about 220° C.; and a container disposed upon the substrate, the container enclosing a volume external to the IC chip elements, wherein the grease is enclosed within the container and the substrate, and the grease fills the volume enclosed by the container and the container is in contact with the active surface of the IC chip.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2007-09-21 2008-03-22 2008-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2011-09-21 2012-03-22 2012-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2015-09-21 2016-03-22 2016-09-21 $7700.00 Window Closed / Lapsed

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