USB Connectors Coating Solution

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Customers demand that today’s electronic devices achieve “Water Repellency”

and “Corrosion Protection” for the USB port and plug. Today, no coating solution

or mechanical solution is available.

USB Charging Port with

PCBAUSB Male Plug

Today’s Challenge

Favored USB coating solution gives you

unprecedent corrosion protection and no short

circuiting even when plugged in under the

water.

Favored Tech Solution

Liquid Repellent

Corrosion Protection

Liquid repellent

and Corrosion Protection

UncoatedWith Favored Coating

Protection for Electrochemical Corrosion:

SEM image of gold plated USB connector surface after salt

water with power on

Liquid Repellent: Favored Nano coating repels liquid

on contact. Uncoated Favored Coating

Favored

Nano

Coating

Our Solution

Uncoated With Favored Coated

✓ Conduct power-on testing on the uncoated and coated USB connector product.

Observe the microscopic appearance of the surface.

✓ After 30 minutes of power-on, the surface of uncoated products shows obvious

corrosion.

✓ For the coated ports, the uniformity of the coating surface is good even after

200 minutes of power-on, and the substrate surface remains unexposed.

✓ Plugging and unplugging 1000X does not effect the coating, has no impact on

underwater electricity resistance or corrosion resistance of the product.

Our Testing Methodology

Power-on experiment - The Time of Current Reaching 1mA at 5V Working Voltage

Coating

thickness

Number of plug-

in/times

Group 1 Group 2 Group 3

min min min

0nm 0 0 1 0

50nm

0 ＞200 ＞200 ＞200

500 ＞200 ＞200 ＞200

1000 ＞200 ＞200 ＞200

5000 ＞200 ＞200 ＞200

10000 ＞200 ＞200 ＞200

200nm

0 ＞200 ＞200 ＞200

500 ＞200 ＞200 ＞200

1000 ＞200 ＞200 ＞200

5000 ＞200 ＞200 ＞200

10000 ＞200 ＞200 ＞200

Test Result Pass Pass Pass

Test Performance & Results

✓ Plugged and unplugged 500-

10,000X.

✓ Observed the time before the

leakage current of the circuit

reaches 1mA when power on.

✓ Short-circuit occurred when

uncoated USB interface is

directly exposed to water.

✓ Nano-protective coating

protected the port from short

circuiting when immersed in

water, and did not effect its

protective performance.

Coating Thickness Water Contact Angle Test

Coating : 49.01nm Testing Equipment

Coating Thickness and Water Contact Angle

Without Coating With Favored Tech

Coating

Performance Testing

Electrochemical Resistance TestSalt Water Spray

After 1000 Plug/Unplug Cycles, SEM (Scanning Electron Microscope) Image Shows that Coating is Nearly

Identical. Detailed Test data available.

Plug/Unplug Testing

70%

Decrease

Case Study: USB Failure Rate is Reduced by 70%

Failure Rate

Without Coating With Favored Tech Coating

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