JP2011029568A - Holding fixture and holding method for mounting thin-plate printed wiring board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixture that facilitates attachment and detachment of a thin-plate printed wiring board and is used for a component mounting process and a reflow process, the fixture improving productivity by solving problems of form deterioration, use frequency limitation etc., of an adhesive in a cleaning process. <P>SOLUTION: A holding fixture for mounting a thin-plate printed wiring board 7 is configured to embed a proper number of compact permanent magnets 3 having a columnar shape etc., in a plate-shaped fixture 1, placing the thin-plate printed wiring board 7 on a surface in contained manner, and placing a thin magnetic body metal plate 8 thereupon in a contained manner to hold the thin-plate printed wiring board 7 using magnetic force of the permanent magnets. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a thin printed wiring board holding jig and a thin printed wiring board holding method for holding a thin printed wiring board during an operation process of mounting electronic components on the thin printed wiring board.

  In the surface mounting process and the reflow process of the thin printed circuit board, the thin printed circuit board is held and conveyed by a jig in which a repeatedly removable adhesive layer is formed to fix the thin printed wiring board on the surface of the plate-shaped jig. Many methods are used. (For example, refer to Patent Document 1).

  However, in the above prior art, dirt adheres to the adhesive during the surface mounting process and the reflow process, or when the thin printed circuit board is attached / detached, and the adhesive strength is weakened. The repeated cleaning causes a phenomenon that the formed adhesive is worn away, and there is a concern that the adhesive may become unusable after being used several hundred times.

In addition, the above-mentioned conventional technology is a technical field suitable for use on a thin printed wiring board such as a flexible substrate, but the adhesive layer has poor adhesiveness during continuous use at high temperatures (250 to 260 degrees). However, there are doubts about the repeatability of accurate positioning.
JP 2001-144430 A

  The present invention can easily and repeatedly attach and detach a thin printed circuit board in light of the problems ahead, increase the number of times it can be used in the surface mounting process and reflow process of electronic components, and ensure accurate positioning repeatability. To do. Another object of the present invention is to provide a thin printed wiring board mounting holding jig and a thin printed wiring board holding method for holding and transporting a thin printed wiring board for the purpose of improving the efficiency of the electronic component mounting process and improving the productivity.

  The thin printed wiring board holding jig for mounting according to the present invention is a plate-shaped jig for holding a thin magnetic metal plate, which presses the thin printed wiring board and the thin printed wiring board by the magnetic force of a magnet, with a recessed storage surface. It is. Using a machine tool equipped with an automatic tool change function on the back of the jig, a counterbore for embedding an appropriate number of small permanent magnets is recessed, and a thin printed circuit board and a thin magnetic metal plate are placed on the surface of the jig. Using the machine tool or the like along the outer shape and shape, a groove for receiving the thin printed wiring board and the thin magnetic metal plate is provided. Further, a hole for removing the thin printed circuit board from the holding jig for mounting the thin printed circuit board is provided in the jig below the groove and the groove in which the thin printed circuit board is placed. Thereby, the thin printed wiring board can be attached and detached from the jig.

  As the plate-shaped jig, a heat-resistant semiconductive resin plate containing an amide imide resin, an ethoxy resin, glass fiber or the like, a titanium alloy, an aluminum alloy, a stainless steel material, or the like is used.

  The thin printed wiring board holding method of the present invention uses a machine tool or the like to insert a small number of counterbores on the back surface of a plate-shaped jig and form a cylindrical permanent magnet, etc., heat-resistant adhesive, press-fit, caulking, etc. Embedded in the method, along the outer shape and shape of the thin printed wiring board and thin magnetic metal plate on the surface of the plate-shaped jig, using a machine tool or the like to recess the groove, first thin printed wiring board Next, when the thin magnetic metal plate is placed, the magnetic force of an appropriate number of small permanent magnets strongly attracts the thin magnetic metal plate and holds the thin printed wiring board.

  According to the present invention, unlike the method of using an adhesive or the like, even in repeated use at a high temperature, changes in form such as adhesion of dirt, deterioration of function, peeling of the adhesive or the like during the cleaning process, etc. Can be avoided.

  As shown in FIG. 1, the holding jig for mounting a thin printed wiring board according to the present invention is provided with a counterbore process 2 for embedding an appropriate number of cylindrical permanent magnets 3 such as a cylindrical shape on the back surface of a plate-like jig 1. Then, a small permanent magnet 3 is embedded by heat-resistant adhesive, press-fitting, caulking, or the like, and a counterbore process 4 for placing the thin printed wiring board 7 is recessed on the surface of the plate-shaped jig 1, and the thin The counterbore processing 6 for placing the shape magnetic metal plate 8 is recessed. The thin magnetic metal plate 8 has a clearance hole 9 for mounting cream solder or electronic parts. The plate-like jig 1 is heat resistant, and includes a half containing an amide imide resin, an ethoxy resin, glass fiber, or the like. It has a plate shape such as a conductive laminated plate (for example, Nika plate manufactured by Nikkan Kogyo Co., Ltd.), a titanium alloy, an aluminum alloy, and a stainless material.

  The thin plate printed wiring board 7 is placed on the surface of the plate-shaped jig 1, which is subjected to counterboring for embedding an appropriate number of small-sized permanent magnets 3 such as cylindrical shapes on the back surface of the plate-shaped jig 1 to form the recesses 2. A concave portion 4 is formed by performing a counterboring process for placement, and a concave portion 6 is formed by performing a counterboring process for placing the thin magnetic metal plate 8. Further, a board removal push hole 5 is provided in the lower part where the plate-shaped jig 1 and the thin printed wiring board 7 subjected to counterboring are placed.

  As shown in FIG. 2, the method of holding a thin printed wiring board using a holding jig for mounting a thin printed wiring board is the surface of a plate-like jig 1 in which an appropriate number of small permanent magnets 3 such as cylindrical shapes are embedded on the back surface. The thin printed wiring board 7 and the thin magnetic metal plate 8 are placed in this order in the concave portion 4 for placing the thin printed wiring board 7 and the concave portion 6 for placing the thin magnetic metal plate 8, respectively. As a result, the magnetic force of the appropriate number of small permanent magnets 3 attracts the thin magnetic metal plate 8 strongly, and holds and fixes the thin printed wiring board 7.

  The present invention has applicability because the demand layer is wide and the quality can be stable for a long time.

1 is a configuration diagram of a holding jig for mounting a thin printed wiring board according to the present invention (for example, a three-sided thin printed wiring board). It is sectional drawing of the holding jig for thin board printed wiring board mounting of this invention. It is sectional drawing of the holding jig for mounting a printed circuit board in which the conventional adhesive bond layer was formed.

DESCRIPTION OF SYMBOLS 1 Plate-shaped jig 2 Cylindrical etc. small permanent magnet storage recessed part 3 Cylindrical etc. small permanent magnet 4 Thin plate printed wiring board storage recessed part 5 Substrate removal push hole 6 Thin magnetic metal plate storage Concave part 7 Thin printed circuit board 8 Thin magnetic metal plate 9 Escape hole 20 for mounting solder paste, electronic parts, etc. Adhesive etc.

Claims (6)

  Place a small number of small permanent magnets such as cylinders from the back of a plate-shaped jig, place a thin printed wiring board on the surface, and cover the entire thin printed wiring board, and place a thin magnetic metal plate A jig for holding the thin printed wiring board on the board placement surface using the magnetic force of the permanent magnet, wherein the board placement surface is a holding jig for mounting the thin printed wiring board.   2. The holding jig for mounting a thin printed circuit board according to claim 1, wherein the plate-shaped jig is a semiconductive resin plate containing an amide-imide resin, an epoxy resin, glass fiber, or the like.   The holding jig for mounting a thin printed wiring board according to claim 1, wherein the plate-shaped jig is a titanium alloy.   The holding jig for mounting a thin printed wiring board according to claim 1, wherein the plate-shaped jig is an aluminum alloy.   2. The holding jig for mounting a thin printed circuit board according to claim 1, wherein the plate-shaped jig is a stainless material.   An appropriate number of small permanent magnets such as cylinders are embedded on the back surface of the plate-shaped jig, and a thin printed wiring board and a thin magnetic metal plate for holding the thin printed wiring board are placed on the surface. The holding jig for mounting a thin printed circuit board according to any one of claims 1 to 5, wherein a recess is formed.

Images