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PCB材料

PCB材料

PCB材料

PCB材料

Insulative teflon woven glass fabric copper-clad laminates F4T-1/2

This is a kind of circuit baseplate based on the insulative teflon plate, which is compressed with electrolytic copper foil (after oxidation treatment ) on both sides, and then pressed together after high-temperature and high pressure treatment.  This product is characterized by excellent electrical performance (i.e. low dielectric constant, low loss) and ideal mechanical strength, which is a good choice for baseplate of Microwave  PCB.
Technical Specifications

Appearance

Meet   the general requirements for baseplate of microwave PCB

Dimensions(mm)

150×150       220×160    250×250     200×300

For   special dimensions, customized lamination is available.

Thickness   and tolerance

0.5±0.05      1±0.1      1.5±0.15      2±0.2      3±0.3

Plate   thickness includes the copper thickness. For special dimensions, customized   lamination is available.

Mechanical   properties

Angularity

0.02mm/mm   for double-layer board

Cutting/   punching property

No   burrs after cutting, and the minimum space between two punching holes is   0.55mm.

 

Peel   strength

In   normal state:≥18N/cm; In the environment of constant humidity and   temperature:≥6 N/cm .

Chemical   properties

The   chemical etching method for PCB can be used for the circuit processing, the   dielectric properties of materials are not changed.

Electrical     properties

Names

Test   conditions

Unit

Specifications

Gravity

Normal   state

g/cm3

2.2~2.3

Water   absorption rate

Dip   in distilled water of 20±2℃ for 24 hours.

%

≤0.01

Operating   temperature

high-low   temperature chamber

-100~+150

Thermal   conductivity coefficient


Kcal   /m .h.

0.4

Coefficient   of thermal expansion

Temperature   rise of 96℃ per hour

×1

9.8~10×10-5

Shrinkage   factor

Two   hours in boiling water

%

0.0005

Surface   insulation resistance

500V   DC

Normal   state

M.Ω

≥1×107

Constant   humidity and temperature

≥1×105

volume   resistance

Normal   state

MΩ.cm

≥1×1010

Constant   humidity and temperature

≥1×107

Pin   resistance

500V   DC

Normal   state

≥1×105

Constant   humidity and temperature

≥1×105

Surface   dielectric strength

Normal   state

δ=1mm(kV/mm)

≥1.5

Constant   humidity and temperature

≥1.4

Permittivity

10GHZ

εr

2.           2.2(±2%)

Dielectric   loss angle tangent

10GHZ

tgδ

≤1×10-3








 If you need microwave radio frequency PCB, click here Microwave Circuit.