Electronic package with heat transfer element(s)

Patent metadata

Field	Value
Publication number	US-9560737-B2
Application number	US-201514637501-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Mar 4, 2015
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

Electronic packages are provided with enhanced heat dissipation capabilities. The electronic package includes a plurality of electronic components, and an enclosure in which the electronic components reside. The enclosure includes a thermally conductive cover overlying the electronic components. At least one heat transfer element is coupled to, or integrated with, the thermally conductive cover and resides between a main surface of the cover and at least one respective electronic component of the plurality of electronic components. A thermal interface material is disposed between the heat transfer element(s) and the respective electronic component(s), and facilitates conductive transfer of heat from the electronic component(s) to the thermally conductive cover through the heat transfer element(s). The thermally conductive cover facilitates spreading and dissipating of the transferred heat outwards, for instance, through a surrounding tamper-respondent sensor and/or a surrounding encapsulant.

First claim

What is claimed is:

1. An electronic package comprising:
a plurality of electronic components;
an enclosure in which the plurality of electronic components reside, the enclosure comprising a thermally conductive cover overlying the plurality of electronic components;
a tamper-respondent assembly fully surrounding the enclosure;
at least one heat transfer element coupled to, or integrated with, a main surface of the thermally conductive cover of the enclosure and residing fully within the enclosure between the main surface of the thermally conductive cover and at least one electronic component of the plurality of electronic components, the at least one heat transfer element being thermally conductive and spaced from the at least one electronic component; and
a thermal interface filler material disposed between and coupling the at least one heat transfer element and the at least one electronic component, and facilitating conductive transfer of heat from the at least one electronic component to the thermally conductive cover of the enclosure through the at least one heat transfer element, the thermally conductive cover facilitating spreading and dissipating the transferred heat outwards through the tamper-respondent assembly.

2. The electronic package of claim 1 , wherein the tamper-respondent assembly includes a tamper-respondent sensor, and an encapsulant over the tamper-respondent sensor, the at least one heat transfer element and the thermally conductive cover facilitating dissipating the heat from the at least one electronic component, outwards through the tamper-respondent sensor and the surrounding encapsulant.

3. The electronic package of claim 1 , wherein the at least one heat transfer element is sized in multiple dimensions to the at least one electronic component of the plurality of electronic components, and is aligned over the at least one electronic component of the plurality of electronic components.

4. The electronic package of claim 1 , wherein the at least one heat transfer element is formed integral with the thermally conductive cover, extending from the thermally conductive cover towards the at least one electronic component from the main surface of the thermally conductive cover, and wherein the at least one heat transfer element and the thermally conductive cover are formed from one or more of copper, brass, aluminum, gold, diamond, graphite, graphene, or beryllium oxide.

5. The electronic package of claim 1 , wherein the at least one heat transfer element has a main surface opposite to and physically contacting the main surface of the thermally conductive cover of the enclosure, the at least one heat transfer element extending towards the at least one electronic component from the main surface of the thermally conductive cover, and wherein the at least one heat transfer element is formed from one or more of copper, brass, aluminum, gold, diamond, graphite, graphene, or beryllium oxide.

6. The electronic package of claim 1 , further comprising multiple heat transfer elements coupled to, or integrated with, the thermally conductive cover of the enclosure, and residing between the main surface of the thermally conductive cover of the enclosure and multiple electronic components of the plurality of electronic components, the at least one heat transfer element being at least one heat transfer element of the multiple heat transfer elements.

7. The electronic package of claim 6 , wherein one heat transfer element of the multiple heat transfer elements overlies at least two electronic components of the multiple electronic components, and is coupled thereto via the thermal interface filler material.

8. The electronic package of claim 6 , wherein the multiple electronic components comprise at least two differently sized electronic components, and wherein the multiple heat transfer elements comprise at least two differently sized heat transfer elements, each sized to and aligned over a respective electronic component of the at least two differently sized electronic components.

9. The electronic package of claim 1 , wherein at least one other electronic component of the plurality of electronic components is directly coupled to the main surface of the thermally conductive cover of the enclosure using the thermal interface filler material, the thermally conductive cover being spaced a specified height over the at least one other electronic component which facilitates the direct coupling of the at least one other electronic component to the main surface of the thermally conductive cover via the thermal interface filler material.

10. The electronic package of claim 1 , wherein the thermally conductive cover includes at least one recessed region, and one heat transfer element of the at least one heat transfer element resides within the at least one recessed region of the thermally conductive cover.

11. The electronic package of claim 1 , further comprising multiple spacers, the multiple spacers extending between the thermally conductive cover and a base of the enclosure, and setting a height of the thermally conductive cover over the plurality of electronic components, and a gap between the at least one heat transfer element and the at least one electronic component, the gap being filled, at least in part, by the thermal interface material.

12. An electronic package comprising:
a substrate supporting a plurality of electronic components;
an enclosure in which the substrate with the plurality of electronic components resides, the enclosure being sealed and comprising a thermally conductive cover overlying the plurality of electronic components;
a tamper-respondent assembly fully surrounding the enclosure;
at least one heat transfer element coupled to, or integrated with, a main surface of the thermally conductive cover of the enclosure and residing fully with the enclosure between the main surface of the thermally conductive cover and at least one electronic component of the plurality of electronic components, the at least one heat transfer element being thermally conductive and spaced from the at least one electronic component; and
a thermal interface filler material disposed between and coupling the at least one heat transfer element and the at least one electronic component, and facilitating conductive transfer of heat from the at least one electronic component to the thermally conductive cover of the enclosure through the at least one heat transfer element, the thermally conductive cover facilitating spreading and dissipating of the transferred heat outwards through the tamper-respondent assembly.

13. The electronic package of claim 12 , wherein the tamper-respondent assembly includes a tamper-respondent sensor, and an encapsulant over the tamper-respondent sensor, the at least one heat transfer element and the thermally conductive cover facilitating dissipating the heat from the at least one electronic component outwards through the tamper-respondent sensor and the surrounding encapsulant.

14. The electronic package of claim 12 , wherein the at least one heat transfer element is sized in multiple dimensions to the at least one electronic component of the plurality of electronic components, and is aligned over the at least one electronic component of the plurality of electronic components.

15. The electronic package of claim 12 , further comprising multiple heat transfer elements coupled to, or integrated with, the thermally conductive cover of the enclosure, and residing between the main surface of the thermally conductive cover of the enclosure and multiple electronic components of the plurality of electronic componen

Assignees

• IBM

Inventors

• Isaacs Phillip D
• Peets Michael T
• Wei Xiaojin

Classifications

• H05K5/065

  sealed by encapsulation, e.g. waterproof resin forming an integral casing, injection moulding · CPC title

• H05K3/30

  Assembling printed circuits with electric components, e.g. with resistors · CPC title

• H05K7/20436

  Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing · CPC title

• Y10T29/4913

  Assembling to base an electrical component, e.g., capacitor, etc. · CPC title

• Y10T29/49137

  Different components · CPC title