Chemical Gold Aluminum Circuit Board HDI Multilayer PCB 100% E Testing

Circuit Board Resistors Digikey Pcb Assembly HDI PCB Flat Bill Of Materials

Introduction to our PCBs

PCB Process - Introduction to HDI
HDI (High Density Interconnect): High-density interconnection technology, mainly using micro-blind / buried vias (blind / buried vias), a technology that makes HDI PCB circuit board circuit distribution density higher. The advantage is that it can greatly increase the usable area of ​​the HDI  PCB circuit board, making the product as miniaturized as possible. However, due to the increase in line distribution density, it is impossible to use traditional drilling methods to drill through holes, and some of the via holes must be drilled with laser drilling to form blind holes, or cooperate with inner-layer buried vias to interconnect.

Generally speaking, HDI PCB use the build-up method (Build Up), first do or press the inner layers, laser drilling and electroplating on the outer layer are completed, and then the outer layer is covered with an insulating layer (prepreg). ) and copper foil, and then repeat the outer layer circuit making, or continue to laser drill, and stack the layers outward one at a time.

The following are examples of HDI board types. The pink holes in the picture are blind holes, which are made by laser drilling, and the diameter is usually 3 to 4 mil; the yellow holes are buried holes, which are made by mechanical drilling, and the diameter is at least 6 mil (0.15 mm).

Aerospace applications

Like automotive applications, aerospace applications of PCBs require extreme precision and durability. Jets and rockets often experience a lot of turbulence in the atmosphere, which means that ordinary rigid PCBs can be stressed enough to be damaged in the process. To solve this problem, most aerospace manufacturers use flexible PCBs that, in addition to being resistant to vibration damage, are lightweight and small.
In addition to being durable, aerospace PCBs must be very high-functioning and precise, manufactured to the best of their ability to avoid technical issues. Since the electronics used in aerospace technology are critical to the safety of vehicles and their crews, it is critical that they function flawlessly.
Some of the more common aerospace applications for PCBs include:
1. Monitoring equipment: Instrumentation, including accelerometers, pressure sensors, microphones, and torque and force sensors All use PCBs as part of their basic functions. These products are used in the engines and cockpits of aircraft and rockets to monitor vehicle functions and communicate with ground control systems.
2. Test Equipment: In addition to its function as an aircraft, PCBs are involved in the development and testing of aircraft. Test equipment that collects data during structural, vibration, and flight testing uses a PCB as its core. This data can be used to develop more efficient, efficient and safer aircraft.

PCB Capacities and Technical Specification

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