Introduction to A Flexible Circuit Coverlay

During the flexible printed circuit board manufacturing process, a flex circuit coverlay (aka coverfilm) is used to encapsulate and protect the external circuitry of a flexible circuit board.
AĀ flexible circuit coverlay serves the exact same function asĀ solder maskĀ that is used on a rigid printed circuit board. The difference with a flex coverlay is the needed element of flexibility and durability it provides to theĀ flex PCB design.
The coverlay consists of a solid sheet of polyimide with a layer of flexible adhesive that is then laminated under heat and pressurized to the circuit surfaces. The required component feature openings are mechanically created using drilling, routing, or laser cutting.
Typical coverlay thickness is 0.001″ polyimide with 0.001″ of adhesive.Ā Thicknesses ofĀ 0.0005″ & 0.002″ are available, but only used as needed to meet specific design requirements.
For more informationĀ visit our website to learn more about ourĀ flexĀ & rigid-flex PCB manufacturing process!

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