Many people carry tablets when traveling. Compared with laptops and desktop computers, tablets are significantly more portable; for studying or work they are easier to operate and to view documents than phones. A tablet's size and weight are often similar to a magazine, so it can be carried in a backpack or handbag without difficulty.
To prevent water or moisture from entering a tablet during normal use and damaging internal circuitry, the device as a whole and its components must undergo airtightness testing.
This article describes how to perform airtightness testing on tablets.
Middle Frame Airtightness Testing
Challenge: The middle frame is the rectangular frame between a tablet's front screen and rear case, with cutouts for buttons, card slots, top and bottom. These features make it difficult to seal the middle frame during airtightness testing.
Solution: Customize fixtures and tooling according to the middle frame's design and structure.
Test Procedure
Place the unit under test into the fixture and secure it so it sits inside a sealed chamber. Set the test program: pressurize to 15 kPa, introduce a fixed volume of air for 5 s, stabilize for 15 s, then test for 5 s. Start the test. If the leakage value does not exceed 50 Pa during the test, the unit passes.
