Ultrathin double-sided FPC (Flexible Printed Circuit) processing jig

Abstract

The utility model discloses an ultrathin double-sided FPC (Flexible Printed Circuit) processing jig, which is suitable for processing ultrathin double-sided FPC products, especially double-sided FPC products with the size of 25 microns and below, can stably adsorb the products so as to facilitate processing, and can process and form laser blind holes meeting the requirements of the products. The ultrathin double-sided FPC processing jig comprises a jig base, a carrier plate and a gasket, the jig base is provided with a plurality of negative pressure holes used for being communicated with negative pressure equipment. The carrier plate is placed on the upper surface of the jig base and provided with a plurality of through holes with the hole diameter smaller than that of the negative pressure holes and a plurality of positioning columns. The carrier plate is used for bearing a to-be-processed double-sided FPC (Flexible Printed Circuit) product; the gasket is placed on the upper surface of the to-be-processed double-sided FPC product; and the positioning column sequentially penetrates through the double-sided FPC product to be processed and the gasket.

Description

Technical Field

[0001] This utility model belongs to the field of FPC processing technology, and specifically refers to an ultra-thin double-sided FPC processing fixture. Background Technology

[0002] Currently, the thickness of double-sided FPC products on the market is generally around 100μm. However, with the development of medical technology, the medical market needs to use ultra-thin double-sided FPC products. The performance of such medical devices is affected by the thickness of the double-sided FPC products, and the existing thickness of double-sided FPC products can no longer meet the usage requirements.

[0003] The processing difficulty of existing ultra-thin double-sided FPC products (total thickness around 25μm, or even less) lies in:

[0004] (1) The existing fixture base suction cup has a hole diameter of about 10mm, which is too strong for ultra-thin double-sided FPC products, making it difficult to control the suction of the processing equipment. Furthermore, because the product is too thin, excessive suction will make the product uneven, affecting the processing and product quality.

[0005] (2) Some parts of the ultra-thin double-sided FPC products need to be processed with laser blind holes (i.e., the laser only penetrates the aluminum foil and substrate on one side, but does not penetrate to the aluminum foil on the other side). Because the product is too thin, the excessive laser energy can easily break through all three layers of material to form laser perforation. The depth control of laser blind holes is difficult and cannot meet the processing requirements, resulting in scrap. Utility Model Content

[0006] The main purpose of this utility model is to provide an ultra-thin double-sided FPC processing fixture, which solves the problems existing in the prior art. It is suitable for processing ultra-thin double-sided FPC products, especially double-sided FPC products of 25μm and below. It can stably adsorb products for processing and process them into laser blind holes that meet the product requirements.

[0007] To achieve the above objectives, the solution of this utility model is:

[0008] An ultra-thin double-sided FPC processing fixture includes a fixture base, a carrier plate, and a gasket. The fixture base is provided with a plurality of negative pressure holes for connecting to a negative pressure device. The carrier plate is placed on the upper surface of the fixture base and is provided with a plurality of through holes with a diameter smaller than the negative pressure holes, as well as a plurality of positioning posts. The carrier plate is used to support the double-sided FPC product to be processed. The gasket is placed on the upper surface of the double-sided FPC product to be processed. The positioning posts pass through the double-sided FPC product to be processed and the gasket in sequence.

[0009] The negative pressure holes of the fixture base and the through holes of the carrier plate are arranged in a rectangular array, and the hole spacing of the through holes is smaller than the hole spacing of the negative pressure holes.

[0010] The upper periphery of the positioning post is provided with an arc surface or a slope.

[0011] Preferably, the positioning posts are located at the four corners of the vehicle plate.

[0012] Preferably, the positioning post is vertically connected to the upper surface of the carrier plate by welding or integral casting.

[0013] The diameter of the through hole in the carrier plate is set at 0.075~0.1mm.

[0014] The vehicle plate is made of aluminum.

[0015] The gasket is made of aluminum foil.

[0016] By adopting the above technical solution, this utility model can simultaneously achieve flatness control and laser blind hole depth control of the double-sided FPC product a to be processed, so as to produce products that meet the requirements, especially suitable for ultra-thin double-sided FPC products of about 25μm, specifically:

[0017] ① Flatness control: By setting a carrier plate between the fixture base and the double-sided FPC product to be processed, the carrier plate has a through hole with a smaller diameter. This ensures that the suction force output by the negative pressure equipment can act on the product to make it flat, while preventing the product surface from becoming uneven due to the large diameter of the hole. This makes the FPC flatter, prevents product wrinkles, and is conducive to the stability of product processing.

[0018] ② Laser blind hole depth control: By setting a shim on the upper surface of the double-sided FPC product to be processed, the laser energy can be effectively controlled. The thickness of the shim dissipates some of the laser energy, preventing it from penetrating to the third layer of the double-sided FPC product to be processed, which is beneficial for the depth control of laser blind holes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0020] Explanation of icon numbers:

[0021] 1- Fixture base; 11- Negative pressure hole; 2- Carrier plate; 21- Through hole; 22- Positioning post; 221- Curved surface; 3- Gasket; a- Double-sided FPC product to be processed; b- Laser blind hole. Detailed Implementation

[0022] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0023] refer to Figure 1 As shown, this utility model discloses an ultra-thin double-sided FPC processing fixture, including a fixture base 1, a carrier plate 2, and a gasket 3;

[0024] The fixture base 1 is provided with several negative pressure holes 11 for connecting to the negative pressure equipment;

[0025] The carrier plate 2 is placed on the upper surface of the fixture base 1 and is provided with several through holes 21 with a diameter smaller than that of the negative pressure hole 11, as well as several positioning posts 22; the carrier plate 2 is used to support the double-sided FPC product a to be processed.

[0026] Gasket 3 is placed on the upper surface of the double-sided FPC product a to be processed;

[0027] Positioning pins 22 pass through the double-sided FPC product a and the gasket 3 to be processed in sequence, so as to position each board on the fixture base 1 and avoid displacement during processing.

[0028] Through the above solution, this utility model can simultaneously achieve flatness control and laser blind hole depth control of the double-sided FPC product a to be processed, so as to produce products that meet the requirements, especially suitable for ultra-thin double-sided FPC products of about 25μm, specifically:

[0029] ① Flatness control: By setting a carrier plate 2 between the fixture base 1 and the double-sided FPC product a to be processed, the carrier plate 2 has a through hole 21 with a smaller diameter, which can ensure that the suction force output by the negative pressure equipment can act on the product to make it flat, and will not make the surface of the product uneven due to the excessively large diameter, making the FPC flatter, preventing product wrinkles, and contributing to the stability of product processing;

[0030] ② Laser blind hole depth control: By setting a shim 3 on the upper surface of the double-sided FPC product a to be processed, the laser energy can be effectively controlled. The thickness of the shim 3 dissipates some of the laser energy, preventing it from penetrating to the third layer of the double-sided FPC product to be processed, which is beneficial for the depth control of the laser blind hole b.

[0031] The following are specific embodiments of the present invention.

[0032] The negative pressure holes 11 of the fixture base 1 and the through holes 21 of the carrier plate 2 are arranged in a rectangular array, and the hole spacing of the through holes 21 is smaller than the hole spacing of the negative pressure holes 11, that is, the through holes 21 are arranged more densely than the negative pressure holes 11.

[0033] The upper periphery of the aforementioned positioning post 22 is provided with an arc surface 221 or a slope, so that the double-sided FPC product a / gasket 3 to be processed can be more easily fitted onto the positioning post 22. In this embodiment, the aforementioned positioning post 22 is set at the four corners of the carrier plate 2, which does not affect the laser processing of the product and can ensure stable positioning; the positioning post 22 is vertically connected to the upper surface of the carrier plate 2 by welding, integral casting or other methods.

[0034] The diameter of the through hole 21 in the aforementioned carrier plate 2 is set at 0.075~0.1mm to control the suction force and ensure the flatness of the product.

[0035] The aforementioned carrier plate 2 is made of aluminum material, with a thickness controlled at around 0.1mm. It can both adsorb the double-sided FPC product a to be processed by relying on the connection between the through hole 21 and the negative pressure hole 11, and achieve efficient heat dissipation by utilizing the thinner carrier plate 2 and the increased surface area of ​​its several through holes 21, thereby reducing the temperature of the laser area and ensuring the accuracy of the laser aperture.

[0036] The aforementioned gasket 3 is made of the same material as the double-sided FPC product a to be processed, that is, gasket 3 is made of aluminum foil. Using the same material as the product makes it easier to calculate the laser processing depth, facilitates control of laser energy, and makes the laser-processed product more in line with requirements.

[0037] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A jig for processing ultra-thin double-sided FPC, characterized in that: Includes jig base, carrier plate and gasket; The fixture base is provided with several negative pressure holes for connecting to the negative pressure equipment; The carrier plate is placed on the upper surface of the fixture base and is provided with several through holes with a diameter smaller than that of the negative pressure hole, as well as several positioning posts; the carrier plate is used to support the double-sided FPC product to be processed. The gasket is placed on the upper surface of the double-sided FPC product to be processed; The positioning post passes through the double-sided FPC product to be processed and the gasket in sequence.

2. The ultra-thin double-sided FPC processing fixture as described in claim 1, characterized in that: The negative pressure holes of the fixture base and the through holes of the carrier plate are arranged in a rectangular array, and the hole spacing of the through holes is smaller than the hole spacing of the negative pressure holes.

3. The ultra-thin double-sided FPC processing fixture as described in claim 1, characterized in that: The upper periphery of the positioning post is provided with an arc surface or a slope.

4. The ultra-thin double-sided FPC processing fixture as described in claim 3, characterized in that: The positioning posts are located at the four corners of the vehicle plate.

5. The ultra-thin double-sided FPC processing fixture as described in claim 3, characterized in that: The positioning post is vertically connected to the upper surface of the carrier plate by welding or integral casting.

6. The ultra-thin double-sided FPC processing fixture as described in claim 1, characterized in that: The diameter of the through hole in the carrier plate is set at 0.075~0.1mm.

7. The ultra-thin double-sided FPC processing fixture as described in claim 1, characterized in that: The vehicle plate is made of aluminum.

8. The ultra-thin double-sided FPC processing fixture as described in claim 1, characterized in that: The gasket is made of aluminum foil.

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