1. Flexible circuits, made of polyimide or polyester film as the base material, are widely utilized in electronic products. Known as Flex PCB, this highly reliable flexible printed circuit board is prone to low mechanical strength and easy cracking, necessitating the addition of a stiffener to enhance its overall strength.

Stiffeners, including steel, FR4, PI, and aluminum, are used to address the flexibility characteristics of FPCs, improve the strength of the plug-in part, and facilitate overall product assembly. So, what are the mounting methods of FPC flexible circuit board stiffeners? The following article will explain in detail.

Manual method

Currently, manual methods are the main approach due to the wide variety of FPCs, different sizes, and various types of bonding reinforcements. However, manual hand-attaching methods are slow and inaccurate, which cannot meet the production needs of FPC flexible circuit boards.

Stamping method

The stamping equipment is used to stamp the reinforcement board, which is then attached to the FPC flexible circuit board. To realize the bonding process, the FPC needs to be transported to the stamping equipment. In the prior art, the FPC needs to be placed on the transfer tray, and the transfer tray is transported to the stamping equipment through linear motion. Multiple linear motions are required to align the FPC with the reinforced plate that has been stamped and formed, making the adjustment steps more complex and time-consuming.

Suction method

The gantry structure is adopted, and the FPC flexible circuit board is transported to the placement position by a jig through rail transportation. The placement head is positioned at the MARK point, and the reinforcing sheet is sucked on the automatic feeder. Compensation is performed through visual recognition, ensuring precise placement. This method offers high placement accuracy and fast speed, fully meeting the needs of mass production.

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