High-reliability millimeter-wave component step welding assembly method

Abstract

The invention discloses a high-reliability millimeter wave component step welding assembly method. The aim is to provide an assembly process method that can effectively improve the overall reliability of millimeter components. The present invention is realized by the following method: firstly, the circuit components in the millimeter wave component are welded on the molybdenum-copper alloy carrier board at a temperature of 300°C by using a eutectic soldering station; The self-adaptive compensation fixture is clamped and positioned, and the vacuum gas phase soldering reflow soldering machine is used to weld it in the corresponding groove of the precision-machined metal cavity; the circuit components and printed boards that are integrated with the molybdenum-copper alloy carrier plate are welded together The top pressure fixture is clamped and positioned, and vacuum gas phase welding is used for reflow welding to the corresponding position of the metal cavity; finally, a laser welding machine is used to seal and weld the millimeter wave under the conditions of laser power 300W ~ 500W, welding speed 2mm / s ~ 3mm / s The component cover and metal cavity realize the packaging of millimeter wave components and complete the assembly and preparation of high reliability millimeter wave components.

Description

technical field [0001] The invention relates to a stepwise welding and assembling method of a high-reliability millimeter wave component. Background technique [0002] With the rapid development of aerospace vehicle-based measurement and control technology based on space-based signal transmission links, there are many millimeter-wave components such as millimeter-wave frequency band phased array antennas and channels on various aerospace vehicles or single-machine pairs of T / R components and frequency conversion components. needs are very urgent. Aerospace vehicles have the characteristics of fast flight speed, harsh flight environment, long range, and long storage time. This feature puts forward higher environmental adaptability and reliability requirements for aerospace vehicle electronic equipment. The equipment reliability growth test outline requires that the equipment has no failure or failure under the combined effects of environmental stresses such as temperature cy...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor environmental adaptability and low reliability of the gluing method of internal circuit components in the traditional millimeter-wave component assembly process, which cannot meet the reliability requirements of new aerospace vehicle electronic equipment, and to provide a millimeter-wave component. External electrical connectors and internal circuit components are fully welded to the metal cavity of the component through multiple welding processes with temperature gradients, and a high-reliability millimeter-wave component assembly method that encapsulates the cavity and cover plate by laser sealing and welding is adopted. In order to effectively improve the overall reliability of millimeter components, meet the reliability requirements of aerospace vehicle electronic equipment, and meet the actual work needs of aerospace vehicles such as fast flight speed, harsh flight environment, long range, and long storage time

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