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2-1 PTFE PCB
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PLAUX-PM13L

Similar to PTFE materials such as high-frequency microwave plate, because the surface energy of its material is very low, through the plasma technology can be its hole wall and material surface activation, improve the binding of the hole wall and the copper plating layer, to prevent the emergence of Black hole after sinking copper, eliminating hole copper and inner layer copper high-temperature rupture burst holes and other issue; improve the adhesion of solder mask ink and screen printing characters, effectively prevent the solder mask ink and printed characters from falling off.

Reasons for poor PTFE surface wetting

1、Low surface energy (20 dyne/cm)

2、High crystallinity, good chemical stability

3、PTFE has a highly symmetrical molecular structure and is a non-polar molecule

PTFE surface wetting commonly used process methods

Process method

Plasma treatment

Sodium naphthalene solution treatment

Process

Dry type

Wet

Consumables

Gas,N2、H2

Solution,Sodium naphthalene complex

Safety

Safety

Danger

Environmental protection

Extremely low exhaust emissions

Irritant exhaust gas and waste liquid

Operating

Simple

Tedious

Effectiveness

Does not hurt the substrate, PTH consistency is good, the rejection rate is low

Easy to damage the substrate, poor PTH consistency, high rejection rate

Expense

One-time equipment investment, consumables, low maintenance costs

Need to change syrups often, high maintenance costs and waste disposal costs

Scanning electron microscope picture

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Before plasmaAfter plasma

After the plasma treatment, the surface is etched evenly and the protrusions increase, which can increase the binding force.

Analysis of results

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Before plasmaAfter plasma

Hydrophilicity experiment of PTFE material

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Pre-treatment, hydrophobicAfter treatment, hydrophilic

PTFE substrate plasma treated copper plating contrast picture

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Copper plating without plasma treatmentCopper plated after plasma treatment

PTFE substrate plasma treatment solder mask comparison chart

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Non-plasma treated solder maskAfter plasma treatment solder mask


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