Reading time ( words)
As the aerospace industry has been tasked with fitting increasingly complex electronics in existing airframes the demands on PCB substrates have begun to overtask the existing state of the art in PCB fabrication.
Recently, I was called in to troubleshoot some reliability problems with a very dense PCB that had components on both sides and required the use of stacked blind vias and buried vias. The usual name for this kind of design is “build-up fabrication,” requiring many trips through the lamination, drilling, and plating operations at a fabricator.
The designers decided to reach down from the outer layer to the third layer below the surface using stacked blind vias.
The process used to create the structure in Figure 1 is to fabricate a PCB using the ordinary lamination, drilling, and plating processes employed for any multilayer PCB. Once this is done, a laser drill is used to create the first blind via at the bottom of the stack as shown in Figure 1.
To read this entire article, which appeared in the January 2023 issue of Design007 Magazine, click here.
Boeing and Shield AI have signed a memorandum of understanding to explore strategic collaboration in the areas of autonomous capabilities and artificial intelligence on current and future defense programs. Shield AI created Hivemind, an artificial intelligence pilot that has flown a variety of aircraft. According to Shield AI, the AI pilot can also enable swarms of drones and aircraft to operate autonomously without GPS, communications or a human pilot in the cockpit.
I-Connect007 Editorial Team
With multiple advanced degrees in aerospace science, Emily Calandrelli could have had her pick of any project in earth and space science. Instead, she has chosen to use her skills in science policy and communication to break down complex science topics, advocate for women in STEM fields, and bolster enthusiasm for the next generation of scientists through her own Netflix show and an active slate of social media accounts. Emily’s platform is huge, but it's one that she wholeheartedly embraces. In this interview with the I-Connect007 Editorial Team, Emily talks about her unconventional entry into science, what’s ahead for space commerce, advice for industry leaders, and what she really thinks about going into space.
Sam Sadri, QP Technologies
Ceramic packages were, for many years, the option of choice for semiconductor prototype assembly, particularly in military-aerospace applications. They can withstand high temperatures and can be hermetically sealed. However, they can be costly and, while they allow for rapid assembly of first samples, the final product is typically a plastic package, so the ceramic prototype doesn’t offer an accurate representation. This need for a better, more viable alternative to ceramic was one of the catalysts that gave rise to open-cavity plastic packaging (OCPP).