Thick Film Circuit High Reliability, Impact Resistance And Vibration, Anti-radiation
Thick film circuit is a screen printing and sintering and other thick film technology in the same substrate on the production of passive networks, and on which the assembly of discrete semiconductor device chip or monolithic integrated circuit or micro-components, and then packaged with a hybrid integrated Circuit. Thick film hybrid integrated circuit is a micro-electronic functional components.
With the development of technology, thick film hybrid integrated circuits use a growing range, mainly used in aerospace electronic equipment, satellite communications equipment, electronic computers, communications systems, automotive industry, audio equipment, microwave equipment and household appliances. Thus, thick film hybrid integrated circuits have penetrated into many industrial sectors. In Europe, thick film hybrid integrated circuits in the computer application of the main position, and then is the telecommunications, communications, military and aviation and other departments. In Japan, a large number of consumer electronics products using thick-film hybrid integrated circuits. The United States is mainly used for aerospace, communications and computer, which accounted for the highest proportion of communications.
In the color TV industry, thick film circuit is generally used as power circuit and high voltage circuit, including switching power supply circuit, as the discharge circuit, frame output circuit, voltage setting circuit, high voltage limit circuit, sound circuit and comb filter circuit.
In the aerospace and aerospace industry, thick film hybrid integrated circuit due to its structure and design flexibility, miniaturization, lightweight, high reliability, impact resistance and vibration, anti-radiation characteristics, in the airborne communications, radar,Thick Film Circuit fire control system , Missile guidance systems, and satellite and various types of spacecraft communications, television, radar, remote sensing and telemetry systems.
Thick film hybrid integrated circuit: is a screen printing and sintering and other thick film process in the same substrate on the production of passive networks, and in which the assembly of discrete semiconductor device chip or monolithic integrated circuit or micro-components, and then packaged Of hybrid integrated circuits.
In the thick film hybrid integrated circuit,Thick Film Circuit the substrate is the most important part, is the slurry, the external components of the base, in the pad performance is insulating material. If the circuit power is large, the substrate can also play a cooling function. In the thick film hybrid integrated circuits, the substrate should have the characteristics of high stability, good compatibility, high thermal conductivity. Among the thick film hybrid integrated circuits, the vast majority of substrate materials are alumina ceramic or beryllium oxide.
In the thick film hybrid integrated circuit, the thick film conductor is a very important structure, with a connecting element, leads the resistor, as a discrete element
Pieces of connection area, thick film capacitor electrode and so on. Thick film hybrid integrated circuit commonly used in the conductor slurry is mainly palladium silver material, the material has good adhesion, solderability and resistance to solder erosion, but because the material silver,Thick Film Circuit a little bit of silver migration, and the line Poor welding performance. In some high-precision circuits, the use of gold paste, which has excellent line welding and low resistance, but the price is expensive and poor welding performance.
Thick film resistance is supported by the thick film resistive slurry, the resistance range is wide and the performance is stable TCR <± 100ppm / ℃, the resistance drift △ R is in the range of 0.1 ~ 0.5%, can form a medium chip resistivity. In the protection of thick film resistance performance parameters from the external environment, wiring conductor multilayer requires the use of thick film media slurry.