In which case will the circuit board deform_Shenzhen StarLight Industrial Development Co., Ltd.

In which case will the circuit board deform

source:Other information release time:2022-11-21 Hits: Popular:PCB Assembly company: Share:

　　 Single Sided PCB

　　1. Generally, a large area of copper foil will be designed on the circuit board for grounding. Sometimes, a large area of copper foil will be designed on the Vcc layer. When these large areas of copper foil cannot be evenly distributed on the same circuit board, the problem of uneven heat absorption and heat dissipation will occur. Of course, the circuit board will also expand with heat and contract with cold. If the expansion and contraction cannot occur at the same time, it will cause different stresses and deformation, At this time, if the temperature of the circuit board has reached the upper limit of Tg value, the circuit board will begin to soften, causing permanent deformation.

　　2. The connection points (vias) on each layer of the circuit board will limit the board's expansion and contraction.

　　Nowadays, most circuit boards are multilayer circuit boards, and there will be rivet like connection points (vias) between layers. The connection points are divided into through holes, blind holes and buried holes. Where there are connection points, the effect of expansion and contraction of multilayer circuit boards will be limited, and the bending and warping of circuit boards will be indirectly caused.

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