Resin hole plugging device and method for double-sided back drilling printed circuit board

Abstract

The invention discloses a resin hole plugging device and method for a double-sided back drilling printed circuit board. The resin hole plugging device comprises a turnover mechanism, a vacuum resin hole plugging machine and a plurality of bearing mechanisms arranged in a horizontal array mode, each bearing mechanism comprises a first bevel gear, a horizontal rod and a bearing frame which are sequentially connected, the horizontal rods are connected to the supporting rods through bearings, clamping grooves are formed in the top faces and the bottom faces of the bearing frames, and vacuum adsorption hole plates are arranged on the clamping grooves. The turnover mechanism is connected with the first bevel gears and used for rotating all the first bevel gears at the same time. The vacuum resin hole plugging machine comprises a resin injection assembly located above the bearing frame and an air pump air exhaust assembly located below the bearing frame. The resin hole plugging device can turn over the printed circuit board, and the back drilling holes in the two faces of the printed circuit board are filled with resin, so that cavities are avoided.

Description

technical field [0001] The invention relates to the technical field of printed circuit board processing, in particular to a double-sided back-drilled printed circuit board resin plug hole device and method. Background technique [0002] With the development of printed circuit boards, printed circuit boards often need to design back-drilled holes. Back-drilled holes are to drill part of the copper on the hole wall of the via hole to avoid shielding of the inner layer signal. After the back-drilling process is completed, the hole diameter of the back-drilled part is larger than that of the reserved part. Resin plugging is usually required after the back drilling process is completed. However, when the printed circuit board has back drilling holes on both sides, when the resin plugs the holes, because the back drilling holes on the bottom surface are small at the top and large at the bottom, the resin is filled from the upper part of the hole, which is very difficult. It is di...

AI Technical Summary

Problems solved by technology

Resin plugging is usually required after the back drilling process is completed. However, when the printed circuit board has back drilling holes on both sides, when the resin plugs the holes, because the back drilling holes on the bottom surface are small at the top and large at the bottom, the resin is filled from the upper part of the hole, which is very difficult. Difficult to fill fully, so there will be voids in the resin plug hole

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