Patent ID: 8089003

Claim:
A printed circuit board assembly comprising: a first printed circuit board, comprising: a first insulation film comprising a first surface and a second surface at an opposite side thereof to the first surface, a first waterproof layer formed in the first insulation film and arranged between the first surface and the second surface for blocking water from passing through the first insulation film in a thicknesswise direction thereof, the waterproof layer being a flat aluminum foil and being parallel to the first surface and the second surface, and two first traces separately formed on the first and the second surface; a second printed circuit board, comprising: a second insulation film comprising a third surface and a fourth surface at an opposite side thereof to the third surface, a second waterproof layer formed in the second insulation film and arranged between the third surface and the fourth surface for blocking water from passing through the second insulation film in a thicknesswise direction thereof, the waterproof layer being a wave-shaped aluminum foil and being parallel to the third surface and the fourth surface as a whole, and a second trace formed on the fourth surface; and an adhesive layer adhering the first printed circuit board and the second printed circuit board together.