Aerospace Printed Circuit Board
Number of layers: 6
Color: Blue oil
Hole Diameter: 0.35mm
Line Distance: 0.4mm
Line Width: 0.5mm
Surface Finish: Immersion Gold
Special Process : Thick gold plate, ultra thick plate, depth control drilling, back drilling, hole filling electroplating, copper slurry plug hole, mechanical blind hole, etc.
Surface Treatment Processes : Include OSP, gold precipitation, silver precipitation, tin precipitation, gold plating, pure gold plating, thick gold plating, nickel palladium gold plating, nickel plating, tin plating, tin spraying, etc.
With the development of today's microelectronics technology, computer science and technology, aviation airborne electronic equipment circuit systems are rapidly developing in the direction of miniaturization, lightweight, modularization, intelligence and composite. On the one hand, the rapid change in the development direction of aviation airborne electronic equipment circuit systems has led to a sharp increase in the complexity and wiring density of large-scale integrated circuits, and therefore, the circuit board failure rate has increased dramatically, which makes the maintenance personnel put forward a higher demand for the reliability and quality of circuit operation. In this environment, how to effectively detect circuit board failures and timely repair work has become a research worker needs to solve the problem.
On the other hand, aviation airborne electronic equipment circuit integration after the formation of the circuit board is very complex, resulting in the circuit board may appear at any time and the type of failure is not controllable, which to a certain extent increases the difficulty of circuit board diagnosis.
Aviation airborne electronic equipment circuit board characteristics on the impact of failure to seize the main contradiction of things, for troubleshooting is particularly important, therefore, the following characteristics of aviation airborne electronic equipment circuit boards on the impact of failure to consider two aspects.
A. The complexity of the aviation airborne equipment environment aviation airborne electronic equipment belongs to the special equipment, with high complexity, high reliability, high environmental adaptability needs.
The provisions of the equipment in many harsh environments should be able to normal ¬ work and storage, the environmental adaptability of the equipment required to involve the main aspects of temperature, height, vibration, shock, acceleration, sand, dust, mold, salt spray, rain, aircraft shelling vibration, electromagnetic compatibility and other aspects. Visible electronic equipment can be realized in the above various environmental effects of the predetermined function and performance of the ability not to be destroyed, that is, the adaptability of the equipment environment. Therefore, when overhauling this type of failure, the component failure caused by environmental factors should be taken into account.
B. Production Mode of Aviation Airborne Equipment Production:
Aviation airborne electronic equipment circuit boards are often time batch manufacturing, the circuit exists due to human operation reasons circuit designers to take the value of the poor or component quality problems may lead to batch problems, due to certain components of the power, voltage, temperature parameters of the mismatch, a short period of time may be faults do not reflect, but delivered out after a period of time after a period of full-load operation which in turn leads to faults one after another travel.