951 Bergquist, 951 Datasheet - Page 16

• Manufacturer Part Number: 951
• Description: THERMAL PAD TO-220 .009" SP1000
• Manufacturer: Bergquist
• Series: Sil-Pad® 1000r

Specifications of 951

• Usage: TO-220
• Shape: Rectangular
• Outline: 19.05mm x 12.70mm
• Thickness: 0.009" (0.229mm)
• Backing, Carrier: Fiberglass
• Color: Pink
• Thermal Resistivity: 0.35°C/W
• Thermal Conductivity: 1.2 W/m-K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Adhesive: -
• Other names: 951; BER199

14
Selecting A Circuit Layer
t
t
t
Current Carrying Capabilities
The circuit layer is the component-mounting layer in Thermal Clad.
Current carrying capability is a key consideration because this layer
typically serves as a printed circuit, interconnecting the components of
the assembly. The advantage of Thermal Clad is that the circuit trace
interconnecting components can carry higher currents because of its
ability to dissipate heat due to I
Temperature rise comparison graph depicts the significant difference between Bergquist
Dielectric HT and FR-4. Additional comparison charts regarding all Bergquist Dielectrics are
available. Note: No base metal used in calculation.
Current Carrying Capabilities
Heat Spreading Capabilities
Flatness In Relationship To Thickness
10
9
8
7
6
5
4
3
2
1
1" by 0.125" ( 25mm by 3.2mm) trace
or 0.006" (152 µm) FR-4 dielectric
on 0.003" (76 µm) HT dielectric
5
10
2
R loss in the copper circuitry.
15
20
HT
1 oz (35
2 oz (70
1 oz (35
2 oz (70
25
µm)
µm)
µm)
µm)
Temperature rise comparison graph depicts the significant difference between Bergquist
Dielectric HT and FR-4. Additional comparison charts regarding all Bergquist Dielectrics are
available. Note: No base metal used in calculation.
Want a cost effective,
optimized circuit design?
This Thermal Clad White Paper addresses specific design
recommendations including mechanical, circuit, soldermask,
fabrication and test options to help optimize your design.
50
40
30
20
10
0
0
50
1" by 0.125" ( 25mm by 3.2mm) trace
or 0.006" (152 µm) FR-4 dielectric
on 0.003" (76 µm) HT dielectric
100
150
200
HT
1 oz (35
3 oz (105
6 oz (210
10 oz (350
1 oz (35
3 oz (105
6 oz (210
10 oz (350
250
µm)
µm)
µm)
µm)
µm)
µm)
µm)
µm)