The advantages of microporous HDI PCB production include achieving very high path density with fewer layers, because traces and vias have a relatively small size. In the microvia HDI pcb, the potential of fewer layers comes from the effective use of patterns with micro-holes, because this provides more space for open circuits, and provides the only applicable design method, with multiple large and fine-pitch BGAs with spacing measure 0.8 mm or less.
High-frequency, high-density circuit boards have the lowest cost, and HDI technology has suitable laminated resolution, which can also improve the power and signal integrity of high-frequency PCBs. Although manufacturers of typical materials used for HDI pcb production perform well in processes that require RoHS, the use of newer materials has the potential for higher performance and lower cost. It is worth noting that these newer materials are not suitable for standard or sequential laminate manufacturing.
The HDI II type structure uses micro-holes, blind holes and buried holes on the laminated core, with at least one layer of micro-holes on one or both sides. PCB manufacturers can stagger the microvias from other microvias and stack them or stagger them with respect to the buried vias.
Although for roughly dense circuit boards that use multiple fine-pitch components, HDI PCB makes Type II laminates significantly better than Type I, but under the limitation of the number of laminated core layers, it has the same limitations as Type I.
Since the production of type II HDI pcb only has micro-holes on its outermost layer, it limits the use of the outermost layer for grounding or power supply layers. In addition, it is not very effective when there is only one stacked layer used for trace routing
XPCB Limited is a manufacturer specializing in the production of high-precision double-sided, multi-layer and impedance, blind buried vias, and thick copper circuit boards. The products cover HDI, thick copper, backplanes, rigid-flex combined, buried capacitance and buried resistance, Golden Finger and other kinds of circuit boards, which can meet the needs of customers for all kinds of products.
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