A 14 - layer board refers to a printed circuit board that contains 14 conductive circuit layers (copper - foil layers). It is formed by alternately stacking 13 layers of insulating base materials (such as FR - 4 substrates) and 14 conductive layers, and then pressing them together under high temperature and high pressure to form an integrated whole. Electrical connections between layers are achieved through metallized holes (through - holes, blind holes, buried holes). Its core structural features are reflected in "layer - by - layer planning and functional zoning"

Principle and Application of Laser Drilling in HDI Manufacturing

在HDI(高密度互连)板的制造过程中,激光钻孔是实现“微孔径,高密度互连”的核心工艺。它利用高能激光束的热或光化学效应来创建盲孔和埋孔(有时小至10μm以下),其直径通常在 25μm到150μm之间 在印刷电路板(PCB)基板上。这取代了传统机械钻孔无法实现的微小孔径加工,为高密度互连(HDI)板的“多层和微型化”发展提供了关键支持。与机械钻孔相比,激光钻孔具有“无工具磨损、高孔径精度以及与柔性/...
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