MICROVIA HDI improve electrical performance
The HDI process allows for higher component density within electronic devices, which improves electrical performance by allowing signals to be transferred faster and more efficiently. This is largely due to the use of smaller vias and tighter spacing between layers, which reduces signal loss. This improvement in efficiency also lowers the overall weight of the device, making it possible for manufacturers to incorporate more components into their products while keeping them slim and lightweight.
Another way that microvia hdi improves electrical performance is by reducing interference between adjacent traces on the board, which is a major factor in high-speed circuits. Microvias have much smaller parasitic capacitance and inductance than traditional through holes, which makes it easier for traces to be placed close together without interfering with each other. This feature is a major reason why HDI PCBs can run faster and more reliably than conventional PCBs.
As an additional benefit, buried vias require less surface copper than through-holes, which saves space on the board. In addition, they are less susceptible to corrosion and are less likely to be damaged by soldering processes than through-holes. Finally, the fact that they are fabricated from laser-drilled holes rather than mechanically drilled means that they are less likely to experience manufacturing defects. While there are still issues with stacked microvias, including the effect of dielectric material, aspect ratio, and copper plating on their reliability, these issues are not as significant as through-hole failures.
In what ways does MICROVIA HDI improve electrical performance?
Stacked microvias can be used in either staggered or stacked structures to create a variety of different patterns. Both are effective at improving signal integrity and reducing crosstalk in high-speed circuits. However, there are certain limitations to this method, and it is important to consult experienced technicians for advice.
There are two basic HDI structures: sequential build-up and every layer interconnect (ELIC). Sequential builds-up is the most common method of construction, while ELIC uses a more complex, multi-step fabrication process. Both are capable of achieving the same electrical performance, but they differ in terms of cost and production time.
Regardless of which type of HDI structure is chosen, the size and placement of the microvias will have a direct impact on the performance of the final product. This is why it is important to choose a manufacturer who can provide accurate and reliable data on the performance of microvias, as well as a thorough test report and analysis. For more information on microvia sizing and reliability, I encourage you to read the article by Happy Holden that discusses this topic in more detail.
