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Soft Substrate Materials

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Soft substrates are used in applications where packaged parts are soldered to the board. In some applications wirebonding can be done to soft substrates.

 

Manufacturer and material

Symbol
or
formula

Relative dielectric constantSoft Substrate Materials

Tolerance on dielectric constant

+/-

Diss-ipation factor

tan Soft Substrate Materials

Temp. coefficient of Soft Substrate Materials(ppm/C)

Mass density

(gr/cc)

Specific heat

(J/g/°C)

Thermal conduc-
tivity (W/m°C)

Coefficient of thermal expansion PPM/°C
x/y/z

Bakelite

 

4.8              

Rogers
Duroid 5870

PTFE/
Random glass
2.33 0.02 0,0012 -115 2.2 0.96 0.26 22/28/173

Rogers
Duroid 5880

PTFE/
Random glass
2.2 0.02 0.0012 -129 2.2 0.96 0.26 31/48/237

Rogers
Duroid 6002

PTFE/
Random glass

2.94

0.04

0.0012

0

2.1

0.93

0.44

16/16/24

Rogers
Duroid 6006
PTFE/
Random glass
6 0.15 0.0027 -350 2.7 0.97 0.48 38/42/24
RogersDuroid 6010 PTFE/
Random glass
10.2-10.8 0.25 0.0023 -390 2.9 1 0.41 24/24/24
FR-4 glass/ epoxy 4.8   0.022       0.16  

Polyethylene

 

2.25

 

 

 

 

 

 

 

Polyflon
CuFlon
PTFE 2.1   0.00045         12.9
Polyflon PolyGuide polyolefin 2.32   0.0005         108
Polyflon
Norclad
thermoplastic 2.55   0.0011         53

Polyflon Clad Ultem

thermoplastic

3.05

 

0.003

 

1.27

 

 

56

PTFE PTFE 2.1   0.0002   2.1 0.96 0.2  

Rexolite
No. 1422

 

2.55

 

 

 

 

 

 

 

Rogers
R/flex 3700
Thermally stable thermoplastic 2.0   0.002         8

Rogers
RO3003

PTFE ceramic

3

0.04

0.0013

13

2.1

0.93

0.5

17/17/24

Rogers
RO3006

PTFE ceramic

6.15

0.15

0.0025

-169

2.6

0.93

0.61

17/17/24

Rogers
RO3010

PTFE ceramic

10.2

0.3

0.0035

-295

3

0.93

0.66

17/17/24

Rogers
RO3203

PTFE ceramic

3.02              

Rogers
RO3210

PTFE ceramic

10.2              

Rogers
RO4003

Thermoset plastic ceramic glass 3.38 0.05 0.0027 40 1.79   0.64 11/14/46

Rogers
RO4350B

Thermoset plastic ceramic glass 3.48 0.05 0.004 50 1.86   0.62 14/16/50

Rogers
RO4403

Thermoset plastic ceramic glass 3.17              
Teflon   2.1   0.0001   2.13-2.22      

Rogers
TMM 3

ceramic/ thermos 3.27 0.032 0.002 37 1.78 0.87 0.7 15/15/23

Rogers
TMM 4

ceramic/ thermoset plastic 4.5 0.045 0.002 0 2.07 0.83 0.7 16/16/21

Rogers
TMM 6

ceramic/ thermoset 6 0.08 0.0023 -11 2.37 0.78 0.72 18/18/26

Rogers
TMM 10

ceramic/ thermoset 9.2 0.23 0.0022 -38 2.77 0.74 0.76 21/21/20

Rogers
TMM 10i

ceramic/ thermoset 9.8 0.245 0.002 -43 2.77 0.72 0.76 19/19/20
Ultralam 2000 glass reinforced 2.24-2.6 -.04 0.0019 -100       9.5/9.5/120

 

Author : Unknown Editor

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