JPH05175633A - Printed board suction fixing device - Google Patents

Abstract

PURPOSE:To make it possible to such and fix a printed board definitely without preparing for many types of suction jigs. CONSTITUTION:There is provided a suction jig on which a large number of pressure reduction holes 1 are formed on the surface. In conformity with the pressure reduction holes 1 of the suction jig 2, a suction hole 3 is installed in such a fashion that it may penetrate the jig from the front side to the rear side. There is provided a shielded sheet 6 formed with an elastic material so as to avoid the installation of the suction hole 3 in a location equivalent to a throughhole 5 installed to a printed board 4. It is arranged that the printed board 4 is sucked on the surface of the suction jig 2 by way of a shield sheet 6. The printed board 4 is also sucked in the suction jig 2 under the condition that the throughhole 5 of the printed board 4 is covered with the shield sheet 6 and the surface of the shield sheet 6 is adapted to follow the projected and recessed parts on the surface of the printed board 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction fixing device for a printed circuit board used when processing the printed circuit board.

[0002]

2. Description of the Related Art When a printed circuit board 4 formed by providing a circuit 11 on a surface of a laminated board 10 is subjected to post-processing such as printing, exposure and dicing, it is necessary to fix the printed circuit board 4 during each processing. is there. There are various types of fixing devices, but the device that is fixed by using suction means is excellent in usability because it can be fixed and released with one touch by turning on / off the suction.

FIG. 2 shows an example of a suction fixing device. A large number of decompression holes 1 are provided on the upper surface, each decompression hole 1 is communicated with a decompression chamber 12, and a connection hole 13 at one end of the decompression chamber 12 is provided. The suction fixing device is constituted by the suction jig 2 formed by connecting to a pressure reducing device such as a pressure reducing pump. In this structure, when the decompression chamber 12 is decompressed after the printed board 4 is placed on the upper surface of the suction jig 2, the decompression holes 1 are decompressed and the printed board 4 can be sucked and fixed.

[0004]

However, when the printed circuit board 4 is provided with the through hole 5, the printed circuit board 5 is sucked onto the surface of the suction jig 2 while the through hole 5 is aligned with the pressure reducing hole 1. Then, there is a problem in that suction is leaked from the pressure reducing hole 1 that coincides with the through hole 5 and the suction force of the printed circuit board 4 is weakened. Therefore, in this case, it is necessary to use the suction jig 2 provided with the decompression hole 1 at a position deviated from the position of the through hole 5 of the printed circuit board 4, but if this is done, a dedicated suction device adapted to the printed circuit board 4 is used. It is necessary to prepare many kinds of jigs 2, which is practically impossible in terms of equipment cost. Further, the surface of the printed board 4 is uneven due to the circuit 11, and if a resist is provided, the resist causes unevenness on the surface. Due to the unevenness of the surface of the printed board 4, the suction jig 2 and the printed board 4 A gap is created between
The suction force of the printed circuit board is also weakened by the suction leaking from the gap. Therefore, the suction fixing device of FIG. 2 has a problem that the printed circuit board 4 cannot be securely fixed.

The present invention has been made in view of the above points, and provides a suction fixing device for a printed circuit board, which is capable of reliably sucking and fixing the printed circuit board without the need to prepare many kinds of suction jigs. It is intended to be provided.

[0006]

A suction fixing device for a printed circuit board according to the present invention includes a suction jig 2 having a large number of pressure reducing holes 1 formed on its surface, and a suction jig corresponding to the pressure reducing holes 1 of the suction jig 2. A shield sheet 6 made of an elastic material so that the holes 3 are formed so as to penetrate through the front and back and the suction holes 3 are not provided at the portions corresponding to the through holes 5 provided in the printed board 4.
It is characterized in that the printed circuit board 4 is sucked onto the surface of the suction jig 2 through the shield sheet 6.

[0007]

Function: The suction holes 3 are provided so as to penetrate the front and back sides corresponding to the decompression holes 1 of the suction jig 2, and the suction holes 3 are not provided at the portions corresponding to the through holes 5 provided in the printed board 4. By using the shield sheet 6 formed of an elastic material, the through holes 5 of the printed circuit board 4 can be sucked by the suction jig 2 while being blocked by the shield sheet 6, and the unevenness on the surface of the printed circuit board 4 can be shielded. It is possible to cause the suction jig 2 to suck the sheet 6 while following the surface of the sheet 6 to close the gap.

[0008]

EXAMPLES The present invention will be described in detail below with reference to examples. The suction jig 2 is made of any material such as a metal material such as iron or SUS, or a resin material such as phenol resin or polyvinyl chloride, and has a large number of pressure reducing holes 1 on its upper surface formed on a smooth surface. , 1 ... are provided. The pressure reducing holes 1, 1 ... Are provided in a grid-like arrangement or randomly provided, and the arrangement thereof is arbitrary. Each of the decompression holes 1, 1 ... Is connected to a decompression chamber 12 formed in the suction jig 2, and the decompression chamber 12 is converted into a decompression device such as a decompression pump by a connection hole 13 provided on a side surface of the suction jig 2. It is connected. If the depressurization holes 1 are provided in a grid-like arrangement, the holes 1 can be used as guide pin holes for setting the printed circuit board 4.

The shield sheet 6 is made of an elastic material such as a silicone rubber sheet, a Teflon sheet, or another rubber sheet having elastic restoring property, and the position corresponding to the pressure reducing holes 1, 1 ... In the drawing, suction holes 3, 3 ... Penetrating to the front and back are formed (the suction hole 3 is not provided at a position corresponding to the through hole 5 of the printed board 4 as described later). The thickness of the shield sheet 6 is 0 .. when the thickness of the circuit 11 formed on the printed circuit board 4 is 50 μm.
It is preferably about 5 mm to 1.0 mm.

The above-mentioned suction jig 2 and the shield sheet 6 are provided to form the suction fixing device for a printed circuit board according to the present invention. When the printed circuit board 4 is suction-fixed using this device, As the shield sheet 6, as shown in FIG. 1A, a sheet having no suction hole 3 at a position corresponding to the through hole 5 provided in the printed board 4 is used. Then, as shown in FIG. 1B, the shield sheet 6 is placed on the upper surface of the suction jig 2, the printed circuit board 4 is placed on the shield sheet 6, and the decompression device is operated in this state to operate the decompression chamber. This can be done by decompressing 12. That is, since the suction holes 3 of the shield sheet 6 are aligned with the depressurization holes 1 of the suction jig 2, when the depressurization chamber 12 is depressurized and the depressurization holes 1 are depressurized, the suction holes 3 of the shield sheet 6 are removed. A suction action is exerted on the surface of the printed circuit board 4 through the, and the printed circuit board 4 can be suction-fixed to the surface of the suction jig 2 through the shield sheet 6.

At this time, since the shield sheet 6 is not provided with the suction hole 3 at a position corresponding to the through hole 5 of the printed circuit board 4, the through hole 5 of the printed circuit board 4 is blocked by the shield sheet 6. Therefore, it is possible to prevent the suction force from leaking from the through hole 5 and weakening the suction force of the printed circuit board 4. Even if the surface of the printed circuit board 4 has irregularities due to the circuit 11 or the like, the irregularities of the shield sheet 6
The surface of the printed circuit board 4 can be elastically deformed so that the surface of the printed circuit board 4 can be followed, and the suction jig 2 can suck the surface of the printed circuit board 4 with the unevenness of the surface of the printed circuit board 4 blocked. Printed circuit board 4
It is possible to prevent the suction power of the above from becoming weak. Therefore, the printed circuit board 4 can be sucked by the suction jig 2 without suction leakage and can be securely fixed. The shield sheet 6 is prepared for each printed wiring board 4 having a different arrangement and number of through holes 5, and therefore, a shield sheet 6 of a type corresponding to the type of the printed wiring board 4 is prepared. Although necessary, the shield sheet 6 can be manufactured inexpensively and easily in a short time simply by making holes in the sheet, and there is no problem. The present invention can also be used for suction-fixing plates other than the printed circuit board 4.

[0012]

As described above, according to the present invention, the suction jig having a large number of pressure reducing holes formed on the surface thereof, and the suction holes corresponding to the pressure reducing holes of the suction jig are formed through the front and back sides of the suction jig and the printed circuit board is provided. Since a shield sheet made of an elastic material is provided so that the suction hole is not provided at a position corresponding to the provided through hole, the printed board is sucked onto the surface of the suction jig through the shield sheet. By using this shield sheet, it is possible to make the suction jig suck the through hole of the printed circuit board with the shield sheet blocked, and it is possible to prevent the suction from leaking from the through hole, and at the same time the surface of the printed circuit board can be prevented. The suction jig can suck the surface of the shield sheet following the unevenness of the shield sheet, preventing the gap due to the unevenness of the printed circuit board and leaking the suction. It is those that can prevent bets,
It is possible to securely fix the printed circuit board by sucking it onto the suction jig without leakage.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is an exploded sectional view and FIG. 1B is a sectional view.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Decompression hole 2 Suction jig 3 Suction hole 4 Printed circuit board 5 Through hole 6 Shield sheet

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H05K 3/40 E 7511-4E 13/02 V 8509-4E

Claims (1)

[Claims] 1. A suction jig having a large number of pressure reducing holes formed on its surface, and a portion corresponding to the through hole provided on the printed circuit board and having suction holes penetrating through the front and back corresponding to the pressure reducing holes of the suction jig. And a shield sheet formed of an elastic material so that the suction hole is not provided, and the printed board is sucked onto the surface of the suction jig through the shield sheet. Suction fixing device.