2024

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P&M Services (R) Ltd

Printed circuit board Manufacturer, Photoplotting Established 1964  All types of Pcb, surface mount sm, PTH, SS single     UK Printed Circuit Board manufacturers. UK PCB Manufacture since 1964. single sided SS PCB, PTH PCB, IMS PCB, PCB JPG, DFX PCB

ML multi layer printed circuit board  prototypes. Cheap high quality PCBs Printed circuit boards. Fast cheap UK Prototype PCB

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FR4  Data Sheet :-                                             STD PCB Material / laminate
 

Test/Specification

FR4 Laminate Typical Values

Thermal Stress, Solder bath 288 deg. C

>60

Dimensional Stability, E-2/150

<0.04% Warp/fill

<1.00% Bow/Twist

Flammability, Classification UL94

V0

Water Absorption E-1/105

0.10%

Peel Strength After Thermal Stress

11 lb./in After 10s/288 Deg. C

Flexural Strength

100,000 lbf/inē Lengthwise

75,000 lbf/inē Crosswise

Resistivity After Damp Heat Volume

10 ^8 M ohms cm

Resistivity After Damp Heat Surface

10 ^8 M ohms

Dielectric Breakdown. Parallel to laminate

>60KV

Dielectric Constant @ 1MHz

4.7

Dissipation Factor @ 1MHz

0.014

Q-Resonance @ 1 MHz

>75

Q-Resonance @ 50 MHz

>95

Arc Resistance

125 s

Glass Transition Temperature

135 Deg. C

Temperature Index

130 Deg. C

A Few Other Relevant Facts from other Sources

Specific Gravity

1.8-1.9

Rockwell Hardness (M scale)

110

Coefficient of Thermal Expansion

11 microns/m/Deg.C Lengthwise

15 microns/m/Deg.C Crosswise

Thermal Conductivity

2.2-2.5 cal/h. cm Deg C

 

BT Epoxy Data

FR4 Laminate

 

 
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