Evaluation Tests (Special Edition) -Connector Trivia vol.6-

Introducing some special evaluation tests for connectors.

Overview

To verify the reliability of connectors, special evaluation tests are performed depending on the installed equipment and product specifications.
Examples of special evaluation tests:

Shifted Mating Test
Fretting Corrosion Test
Drop Test
Aging Test
Coplanarity Measurement During Heating
Combined Vibration Test
Dust Test
Environmental Test
Solder Peeling Strength Test
Waterproofing Test

Test Items and Objectives

1. Shifted Mating Test

Check the fitability in consideration of the variation of mating in board to board connectors.

2. Fretting Corrosion Test

When carrying a mobile device, surface damage (wear) occurs due to repeated small vibrations. Contact reliability is checked to meet such situations.

3. Drop Test

Check the performance of parts when drop impact is applied. It is intended for use with smartphones and wearable devices that are accidentally dropped.

4. Aging Test

Even if the fitted FPC/FFC can move due to the structure of the device on which the connector is mounted, check that the contact is made correctly.

Keywords

What is Aging?
Aging tests, which are derived from the "the condition of growing old or passing through time" are also used to test machines and electronic equipment before they are shipped, run-in tests before they are put into service, and tests to evaluate durability and durability under prolonged load.

5. Coplanarity Measurement During Heating

Check the behavior of the contact tail (landing surface) position against the heat during reflow.

6. Combined Vibration Test

In addition to vibration when the car is running, resistance to repeated fluctuations in low temperature (shrinkage) and high temperature (expansion) is checked.

7. Dust Test

For parts installed in cars, check if the parts function properly even in a dusty environment.

8. Environmental Test

Deterioration caused by the natural environment is confirmed by irradiating a light source approximating sunlight.

9. Solder Peeling Strength Test

Check whether there is a problem with the soldering by the force when disengaging the mating or operating the connector.

10. Waterproofing Test

Check the waterproofing effect when installed on equipment used outdoors.

Waterproofing Test

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Comprehension Test

Q. In order to confirm the reliability of the connector, special evaluation tests are performed depending on the installed equipment and product specifications. What kind of test is shown in the image on the right?
　Please choose the answer from below.