Advanced Cooling Technology

Advanced & Reliable

Leading Thermal Solutions

1045

IT B 1206

Tel. 031-445-2258 Fax. 031-445-2259

E-mail : taeinlts@taeinlts.co.kr

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.

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. Heat Sink ()

Heat Spreader

.

Operation Principal of the Heat Spreader

conduction/convection

case

wick possible condensation section

heat source

vapor

evaporation section

liquid

liquid

vapor vapor

liquid

liquid

vapor passage

The same principles of

operation with the heat pipes

conduction

vapor flow

conduction/convection

capillary force

vapor flow

liquid flow

case

heat source

evaporation section

liquid vapor [heat absorption]

condensation section

vapor liquid [heat release]

the outside

vapor passage

1/11

.

Heat Sink ,

Heat Sink .

(1.0 ~ 2.5mm) Heat Sink Base Heat Sink .

.

Heat Sink .

Heat Spreader cover .

: 12 ~ 70mm

: 1.0 ~ 2.5mm

: 300mm, 400mm, 500mm

Heat Spreader

Heat Spreader

2/11

. - 1

Test Results of the Heat Spreader(1)

120

50

* thickness of the Heat Spreader/Copper Plate : 1.5mm

11

9 heat source

about 0.8cmm

70

62

16.8

upper plate (fin side)

bottom plate

1

2

3

4

5

6

7

8

9

10

11 12

13

14

15

16

17

18

19

Win[W] : 10, 20, 30, 40

Heat Spreader

3/11

Test Results of the Heat Spreader(1)

Heat Spreader

1 107.0 89.1 70.5 46.12 90.0 76.1 55.2 41.73 90.2 76.2 55.2 41.94 88.5 74.8 55.8 41.35 87.0 73.0 54.5 40.76 75.7 65.7 51.9 37.17 82.6 68.2 55.0 40.38 72.9 62.8 49.9 36.99 69.6 60.1 48.7 36.110 78.0 64.9 53.9 39.311 68.1 59.0 48.0 35.612 85.6 72.4 55.9 39.913 89.7 74.7 56.3 40.214 79.8 72.4 54.9 40.615 76.0 64.7 51.0 37.216 85.7 75.8 53.8 41.517 89.7 52.1 46.0 41.518 94.5 79.5 58.8 42.719 74.0 61.8 49.7 36.9

Tamb[] 22.7 23.4 26.4 23.5

Win[W] 39.3 30.5 20.3 10.4

1 62.7 55.9 46.1 35.72 45.8 41.3 36.0 30.33 45.7 41.0 35.7 30.24 45.6 41.1 35.7 30.25 45.2 40.9 35.4 30.26 44.4 40.0 34.7 29.57 44.2 39.6 34.4 29.48 43.7 39.2 34.2 29.29 40.7 35.3 29.6 25.010 37.5 33.3 28.6 24.711 38.6 33.4 28.3 24.412 45.3 40.8 35.6 30.113 45.7 41.2 35.8 30.314 45.2 40.7 35.5 30.015 43.9 39.5 34.4 29.316 43.8 39.3 34.4 29.317 44.7 40.2 35.0 29.618 45.9 41.4 36.1 30.419 40.3 36.8 32.3 28.1

Tamb[] 22.5 23.1 22.6 22.4

Win[W] 39.3 30.5 20.3 10.4

Copper Plate

. - 2

4/11

Test Results of the Heat Spreader(2)

Push gauge load : 10~11 Kgf

Heat source Heat spreader

Push gauge

Tj

T1 T2 T3 T...

every 45mm

25mm Heat source

Heat spreader

L[mm]

Heat insulating material

Test Schematic

Test Conditions

- Materials : Heat spreader, Copper plate, Aluminum plate

- Dimensions : 39mm x 300, 400, 500mm x 2.5mm

- Heat source : 30 x 30 mm

- Input power : 15, 20, 25 Watts

- Flow conditions : Natural convection

- Orientation : Horizontal

- Time : Until achieving steady state

. - 3

5/11

Test Results of the Heat Spreader(2) Test Results : 39mm 300mm 2.5mm

where, Thermal resistance, R

Rj -1 = (Tj - T1) / Input power , R1-7 = (T1 - T7) / Input power, Rj -7 = (Tj - T7) / Input power

Heat

sourceAmbient

Tj T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 Ta Rj-1 R1-7 Rj-7

Heat spreader 15.02 77.9 76.1 75.7 75.7 75.1 74.6 73.7 71.6 - - - - 22.9 0.12 0.30 0.42

Copper plate 15.21 91.8 88.0 80.6 70.4 66.2 61.2 58.6 56.9 - - - - 23.9 0.25 2.04 2.29

Aluminum plate 14.72 94.2 92.4 82.5 68.8 64.6 59.9 57.0 55.6 - - - - 24.0 0.12 2.50 2.62

Material

Thermal resistance

[/W]Heat spreader

Remark

Input

power

[Watt]

0 1 2 3 4 5 6 7 8 950

55

60

65

70

75

80

85

90

95

Te

mp

era

ture

, [

]

Thermocouple numbers

Heat spreader

Copper plate

Aluminum plate

Tj, Heat spreader & Copper plate : 13.9

Tj, Heat spreader & Aluminum plate : 16.3

Tj-7, Heat spreader : 6.3

Tj-7, Copper plate : 34.9

Tj-7, Aluminum plate : 38.69

. - 4

6/11

Test Results of the Heat Spreader(2) Test Results : 39mm 400mm 2.5mm

Tj, Heat spreader & Copper plate : 20.6

Tj, Heat spreader & Aluminum plate : 26.5

Tj-7, Heat spreader : 5.9

Tj-7, Copper plate : 55.5

Tj-7, Aluminum plate : 64.7

where, Thermal resistance, R

Rj -1 = (Tj - T1) / Input power , R1-9 = (T1 T9) / Input power, Rj -9 = (Tj T9) / Input power

0 1 2 3 4 5 6 7 8 9 10 1140

50

60

70

80

90

100

110

120

Te

mp

era

ture

, [

]

Thermocouple numbers

Heat spreader

Copper plate

Aluminum plate

Heat

sourceAmbient

Tj T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 Ta Rj-1 R1-9 Rj-9

Heat spreader 20.47 84.6 82.5 81.9 81.9 81.9 81.8 81.8 81.0 80.7 78.7 - - 22.6 0.11 0.18 0.29

Copper plate 19.06 105.2 100.2 91.2 77.7 70.5 62.7 57.2 53.5 51.2 49.6 - - 23.4 0.26 2.45 2.71

Aluminum plate 20.18 111.1 108.4 94.8 77.5 68.9 59.7 53.7 50.0 47.9 46.4 - - 21.0 0.13 2.89 3.03

RemarkMaterial

Input

power

[Watt]

Heat spreaderThermal resistance

[/W]

. - 5

7/11

Test Results of the Heat Spreader(2) Test Results : 39mm 500mm 2.5mm

Tj, Heat spreader & Copper plate : 34.7

Tj, Heat spreader & Aluminum plate : 41.5

Tj-7, Heat spreader : 7.2

Tj-7, Copper plate : 80.5

Tj-7, Aluminum plate : 88.3

where, Thermal resistance, R

Rj -1 = (Tj - T1) / Input power , R1-11 = (T1 T11) / Input power, Rj -11 = (Tj T11) / Input power

0 1 2 3 4 5 6 7 8 9 10 11 12 1340

50

60

70

80

90

100

110

120

130

140

Te

mp

era

ture

, [

]

Thermocouple numbers

Heat spreader

Copper plate

Aluminum plate

Heat

sourceAmbient

Tj T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 Ta Rj-1 R1-11 Rj-11

Heat spreader 24.56 87.5 83.5 83.2 83.1 83.1 83.0 83.0 82.9 82.4 82.1 80.7 80.3 22.8 0.16 0.13 0.29

Copper plate 25.11 122.2 120.1 105.8 87.1 77.2 67.1 59.4 53.2 49.3 46.1 44.0 41.7 21.6 0.09 2.66 2.75

Aluminum plate 24.82 129.0 123.8 108.8 89.3 76.6 65.7 57.0 51.9 47.4 44.2 42.3 40.7 21.8 0.21 2.90 3.11

RemarkMaterial

Input

power

[Watt]

Heat spreaderThermal resistance

[/W]

. - 6

8/11

. Heat Sink () - 1

wf

L

b

tf,e H

t

b

p

Heat Sink

W : Base 450 420

Wf : Base 403 403

L : Heat Sink 677 600

H : 63 63

tb : Base 12 12

tf,b : Base 3 2

tf,e : 2 1.5

p : 10 10.55

N : 41 39

Heat Sink

W : Base 350 350

Wf : Base 341.5 341.9

L : Heat Sink 585 550

H : 42 42

tb : Base 8 8

tf,b : Base 1.5 1.5

tf,e : 1.0 1.0

p : 10 9.2

N : 35 38

Body Heat Sink Door Heat Sink

SHS Heat Sink

Heat Sink

Body Heat Sink Heat Sink Base

420mm .

420mm Ton Heat Sink

Body Door Heat Sink Base Heat

Spreader Base .

[ : mm] [ : mm]

9/11

Body Heat Sink : Amplifier

Heat Spreader

- TR : 51.6

- Amplifier : 46.0

46.0

Heat Spreader

- TR : 46.6

- Amplifier : 42.2

42.2

41.2

41.2 43.4

44.2

Heat Spreader

TR 5

Amplifier 3.8

[ TR : 338W ] [ : 25] [ : 25]

Heat Spreader 4

. Heat Sink () - 2

10/11

Heat Spreader

- TR : 49.1

- Amplifier : 45.2

45.2

Heat Spreader

- TR : 55.9

- Amplifier : 50.1

50.1 48.9

48.8

Door Heat Sink : Amplifier [ TR : 290W ]

Heat Spreader

TR 6.8

Amplifier 4.9

[ : 25] [ : 25]

Heat Spreader 4

. Heat Sink () - 3

11/11