What is the difference between Flexible PCB and Rigid PCB
本帖最后由 tunghk1501 于 2016-12-22 11:46 编辑What is the flexible circuits? What is The rigid circuit boards?What is the difference between the two?flexible PCBAlso known as flexible circuit boards,Is rolled with copper orElectrolytic copper as the material,Flexibility is very good, Bending resistance.Normally we talk about PCBCalled rigid board,The FPC called the Flexible PCB.Small and medium-sized flexible circuits/s design followsRigid circuit board design,But not completely The same with rigid circuit board.Specific differences can be summarized as the following aspects:1, softnessA standard for flexible circuit boardsIs to require good flexibility,Flexible printed circuit boardThree-dimensional space is very important,Because of bending and flexible applicationsCan save space and reduce the board layer,Mostly single-sided.Hard board material isRequirements more excellent,With compression,Wear-resistant high temperature and other characteristics,So the limitations of the space,Common Multilayer PCB.2, the carrying capacity of the lineCompared with the rigid circuit board,Flexible PCB is PoorAnything from a straight line to a corner Or different line width changes,Should be smooth transition.We can see a lot Flex PCB with snake-like alignment.The same line width from the hard boardOf the current carrying capacityMuch stronger than the soft board,So we commonFlexible PCB applicationsIn the place of smaller current,Such as mobile phone cable. 3, the pad designIn the periphery of the pad,There is one from the flexible material Rigid material changes.Board This area is the soft boardMore likely to damage the conductor.Therefore, the pads should be avoidedIn the region prone to bending.Rigid board does not need to emphasize this problem.4, the shape of the plateRegardless of the soft board hard boardShape will be a variety of,Flexible PCB in shapeOn the general preferred rectangle,So you can better save the substrate,Leave at the edge of the boardEnough free margins,In the shape,General solution made of circularThan the sharp inner angle is better,The inner solution of the light shape is easyCausing the plate to tear.Rigid board is a fixed mode,Depending on the shape of the product.5, the thickness of the boardFPC is thinner than Rigid board,Conventional hard board thinnest to doTo 0.2mm has been very good,While the flexible pcb Can be thinner than paper,So in many areas orThere is a good space for development.From the above can see the Flex PCBAnd Rigid boards are different,Each have their own fields.
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