Magnetic jig and multilayer FPC welding method

Abstract

The invention relates to a magnetic jig which comprises a magnetic pressure board and a magnetic carrier board. A plurality of magnetic beads are arranged in the magnetic carrier board, and the size and the number of the magnetic beads are adjusted to control the attraction force of the magnetic carrier board to the magnetic pressure board. The invention relates to a multilayer interconnection FPCwelding method, which comprises the magnetic jig and comprises the following steps of: S1, reinforcing the bottom of a main board; S2, carrying out tinning processing on a main output bonding pad anda main input bonding pad; S3, pasting a layer of double faced adhesive tape on the surface, close to a secondary board, of the main board or the surface, close to the main board, of the secondary board; S4, aligning the main board with the secondary board, and attaching the secondary board to the main board after alignment; and S5, placing the secondary board and the main board on a magnetic carrier board, pressing the magnetic pressure board onto the secondary board by using magnetic attraction of the magnetic pressure board and the magnetic carrier board, and applying proper pressure to themagnetic pressure board. According to the invention, poor welding caused by surface tension can be improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of circuit boards, in particular to a magnetic fixture and a multilayer FPC welding method. 【Background technique】 [0002] Whether it is a printed circuit board or a flexible circuit board, there is a problem of line crossing, but the wiring cannot be crossed, so it is necessary to mount another circuit board on one circuit board, and the unavoidable crossing lines are placed on another circuit board. Arrangement without crossing. When the actual intersecting lines are relatively simple and few, using a circuit board with a large area will cause the disadvantages of low utilization rate and high cost. At the same time, the quality of the product is affected by whether there is good contact between the two circuit boards. If welding is performed manually, the accuracy of welding is low, the scrap rate is high, and the labor cost is high. 【Content of invention】 [0003] In order to overcome the problems...

AI Technical Summary

Problems solved by technology

When the actual intersecting lines are relatively simple and few, using a circuit board with a large area will cause the disadvantages of low utilization rate and high cost

At the same time, the quality of the product is affected by whether there is good contact between the two circuit boards. Purely manual welding has low welding accuracy, high scrap rate, and high labor costs.

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