低流动度半固化片的压合技术研究及其产品应用开发

随刚挠板、阶梯板与金属基散热板需求量的增大,相对于纯胶片更为便宜的低流动度半固化片的使用量增多,但由于此类半固化片的流胶量较低而往往容易导致压合白斑。本文对比试验了图形分布、半固化片数量、层压辅助材料、拼板工艺边设计及层压工艺参数等的影响,提出了低流动度半固化片的压合模型,此法有效避免了必须采用低流动度半固化片与FR-4半固化片混压或必需采用额外压合辅材的业界做法;试验并成功采用陪板填充阶梯槽的独特的简单工艺,避免了业界报道的操作相对复杂的叠板方式,可成功避免板凹和板件局部变形的质量问题,希望能对PCB制造业同行有所帮助。

Pressing technology in low-flow prepreg and its application development

With the development of rigid-flex board,die cavity board and heat-sink board,the demands of lowflow prepreg with a cheaper price than bonding sheet increase,but lamination crazing are often produced during the process because of its low resin flow.This article introduces the major factors of copper patterning,amount of pieces of prepreg,lamination accessorial material,panel frame design and lamination parameters.Finally,a lamination model was brought forward witch doesn't need to mixing press with low-flow...