FPC Mounting Bridge Structure to Prevent Reflow Warping
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Solution Overview
Problem
Conventional methods for mounting chip components on flexible substrates using reflow deposition often result in warping, leading to out-of-position mounting failures.
Innovation Solution
A component-attached FPC manufacturing method that integrates an FPC body, an arm portion, a component mounting portion, and a bridge or extension, with solder bonding and heating to secure the circuit component in place, using a plate to support the mounting portion during reflow to prevent warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chip components are mounted on a portion exposed from an opening of a plate during reflow deposition, then the chip component can be mounted on the flexible substrate, but the portion on which the chip component is mounted may warp, causing the chip component to be mounted in an out-of-position state
Solution Approach 1:
The patent applies preliminary action by forming a support structure (extension portion or bridge) in advance before the reflow deposition process. This support structure is预先 formed on the FPC to provide mechanical support during component mounting, preventing warping before it occurs and ensuring accurate component positioning.
Solution Approach 2:
The patent uses an intermediary structure (extension portion or bridge) that acts as a mediator between the FPC body and the component mounting portion. This intermediary provides mechanical support and distributes stress, preventing warping of the mounting portion while allowing the component to be accurately positioned and soldered.
2Stability of the object's composition
If a plate is used to press the flexible substrate to prevent warping, then the substrate stability is improved, but the flexibility and ease of operation are reduced
Solution Approach 1:
The patent segments the FPC into distinct functional portions: a flexible FPC body for easy handling and routing, and a supported component mounting portion (with extension or bridge) for stability during soldering. This segmentation allows the FPC to maintain flexibility where needed while providing stability where components are mounted.
Solution Approach 2:
The patent applies local quality by providing structural support (extension portion or bridge) only at the component mounting portion where stability is needed, while leaving the FPC body flexible for easy handling. This localized support ensures substrate stability during soldering without compromising the overall flexibility and ease of operation of the FPC.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures precise mounting of circuit components at predetermined locations on the FPC, alleviating warping and ensuring correct positioning.
Implementation Method 1
heating the FPC, melting the solder, and implementing the circuit component on the component mounting portion
Data Source
AI summary
A component-attached FPC manufacturing method for manufacturing a component-attached FPC in which a circuit component is solder-bonded to an FPC, includes an FPC forming step of forming an FPC that integrally includes an FPC body, an FPC arm portion branching off from the FPC body, a component mounting portion provided on an end portion of the FPC arm portion and on which the circuit component is mounted, and a bridge connecting the component mounting portion and the FPC body, a component mounting step of mounting the circuit component on the component mounting portion via a solder, and an implementing step of heating the FPC, melting the solder, and implementing the circuit component on the component mounting portion.