Method for embedding resistor in printed circuit board and printed circuit board

Abstract

The invention discloses a method for embedding a resistor in a printed circuit board and the printed circuit board thereof. The printed circuit board comprises a connecting cylinder, a fixing plate isarranged on the inner side of the connecting cylinder, a plurality of vent holes are formed in the fixing plate, a moving block is installed below the fixing plate, and the moving block and the innerwall of the connecting cylinder are of a matched structure; a bottom detection spring is installed between the movable block and the fixed plate, a bottom detection needle is installed on the lower side of the movable block, the lower end of the bottom detection needle penetrates through the bottom of the connecting cylinder and extends to the outer side, the bottom detection needle is of a hollow structure, a plurality of vent grooves are formed in the bottom detection needle, and an air blowing device and a liquid suction device are installed outside the bottom detection device; and according to the invention, the protective layer is arranged around the resistance groove by using the small abrasive drill, excessive erosion is prevented through the protection of the protective layer, theair blowing device and the liquid suction device, and the characteristics of no damage to the circuit board and small resistance deviation are achieved.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a method for embedding resistors in a printed circuit board and the printed circuit board thereof. Background technique [0002] With the rapid increase of digital products that send and receive signals at a high speed in electronic products, high-density packaging technology has increasingly shown its importance. Embedded components can shorten the distance of signal transmission, improve electrical characteristics, improve and increase the effective area of ​​the package, reduce soldering parts, and improve the reliability of the package. At the same time, small size and easy packaging are very beneficial to reduce costs, especially to improve electrical characteristics. Embedded planar thin-layer resistors are generally used in the special printed circuit board manufacturing technology layer of the inner printed circuit information of the multi-layer board. The...

AI Technical Summary

Problems solved by technology

[0003] Existing circuit boards use chemical erosion or grinding drills to open the grooves when digging the resistance slots. However, when the grinding drills are used for slotting, although the large grinding drills are fast in slotting, they are easy to damage the circuit boards. At the same time, chemical erosion is the safest, but It is difficult to control the thickness and width of the slot, which may easily lead to resistance deviation

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