CN107703158B

CN107703158B - Improved method for FPC (Flexible printed Circuit) circuit board drilling inspection

Info

Publication number: CN107703158B
Application number: CN201711121646.5A
Authority: CN
Inventors: 刘清华
Original assignee: Huangshi Xipu Electronic Technology Co ltd
Current assignee: Huangshi Xipu Electronic Technology Co ltd
Priority date: 2017-11-14
Filing date: 2017-11-14
Publication date: 2020-06-12
Anticipated expiration: 2037-11-14
Also published as: CN107703158A

Abstract

The invention relates to the technical field of FPC (flexible printed circuit) boards and discloses an improved method for drilling inspection of an FPC board. The improved method for testing the drilling of the FPC board marks the control board after penetrating through the FPC board when the drilling machine drills holes, utilizes the reaction of a reagent and a reactant to enable the reactant to generate darker color, uses an opaque shielding plate to prevent the color display after the marked holes are punched, the FPC circuit boards with different numbers are removed through the number of colored holes displayed on the comparison board, the time for checking the FPC circuit boards one by using a hole checking machine is saved, the FPC circuit boards taken out are checked for the second time by using the hole checking machine (errors caused by too light holes on the comparison board, unclear marks and the like are prevented), thereby divide certified products and substandard product, the quality and the production progress of guarantee product, through the corresponding production of FPC circuit board and comparison board, in time change and clear up, reduce the gathering of drilling adhesion thing, start small-size hair-dryer, blow burr etc. that drilling produced and accelerate the heat dissipation of drill bit.

Description

Improved method for FPC (Flexible printed Circuit) circuit board drilling inspection

Technical Field

The invention relates to the technical field of FPC (flexible printed circuit) boards, in particular to an improved method for drilling inspection of an FPC board.

Background

The flexible printed circuit board (FPC) is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent flexibility, and has the characteristics of high wiring density, light weight, thin thickness and good bending property, in the production process, in order to prevent the problems of FPC board scrap and material supplement caused by too low yield rate or reduction of coarse process problems such as drilling, calendering and cutting due to too many open and short circuits and evaluate how to select the flexible circuit board which can achieve the best effect for the customer to use, the pre-production pretreatment is particularly important, the pre-production pretreatment is carried out before production, three aspects needing to be treated are all finished by engineers, firstly, the FPC board process evaluation is carried out, whether the FPC board of the customer can be produced is mainly evaluated, whether the production capacity of a company can meet the board making requirements of the customer and the unit cost, if the FPC board evaluation passes, then, the materials are prepared immediately to meet the raw material supply of each production link, finally, engineers process engineering files such as CAD structure diagrams of customers and the like to be suitable for the production environment and production specifications of production equipment, and then the production drawings, MI (engineering process cards) and other data are transferred to each department such as a production department, a literary control department, a purchasing department and the like to enter a conventional production flow.

The production process can be divided into a single-sided board (material cut → drill hole → dry film attachment → alignment → exposure → development → etching → release → surface treatment → coating film attachment → pressing → curing → surface treatment → nickel deposition → printing character → cutting → electric power cutting → final inspection → packaging → shipment) and a double-sided board (material cut → drill hole → plating → pretreatment → dry film attachment → alignment → exposure → development → pattern plating → release → pretreatment → dry film attachment → exposure → development → etching → release → surface treatment → coating film attachment → pressing → curing → nickel deposition → printing character cutting → electric power cutting → final inspection → packaging → shipment), and widely used for mobile phones, CD audio and computer screens, etc.

The drilling process of the FPC circuit board mostly uses 0.1MM drill pins, the machine station still alarm is often caused by inaccurate measurement of the length of the drill pins of the machine station, so that the phenomenon of few holes can occur in the drilling process of the FPC circuit board, most of the holes on the FPC circuit board are holes with the hole diameter of 0.1MM, the thickness of the board is not more than 0.1MM, and the quality of products and the delay working progress are seriously influenced because the processing capacity of equipment is limited during the processing production, and the defects of multiple holes, few holes, hole plugs and the like of the FPC circuit board cannot be detected.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an improved method for drilling inspection of an FPC (flexible printed circuit) board, which solves the problems that the quality of a product is seriously influenced and the working progress is delayed because the poor properties of multiple holes, few holes, hole plugs and the like of the FPC board cannot be detected due to the limited processing capacity of equipment during the processing production.

(II) technical scheme

In order to achieve the purpose in the background art, the invention provides the following technical scheme: the improved method for the drilling inspection of the FPC comprises an acrylic plate, wherein a clamping groove is formed in the top of the acrylic plate, a comparison plate is arranged inside the clamping groove, an opaque shielding plate is fixedly connected to the top of the comparison plate, a reactant is filled inside the comparison plate, and the color of the reaction product after the reaction with the reactant and a reagent is far deeper than the color of the opaque shielding plate.

Another technical problem to be solved by the present invention is to provide an improved method for testing the drilling of the FPC board, comprising the following steps:

1) an acrylic plate is taken as a bottom plate, the acrylic plate is placed on an operation platform, and a contrast plate is placed on the top of the acrylic plate.

2) Cleaning the comparison board, paving the FPC circuit board on the comparison board, and fixing the FPC circuit board.

3) The drilling machine is started, the FPC board and the comparison board are drilled together, the comparison board serves as a reference basis, the small blower is started, burrs and the like generated by drilling are blown, heat dissipation of the drill bit is accelerated, and accumulation of the operation platform is cleared in time.

4) And taking out the acrylic boards, placing the perforated FPC boards and the comparison boards thereof in the collecting box in a one-to-one correspondence manner, and arranging and numbering the FPC boards according to the sequence.

5) And (4) sequentially putting the comparison boards into a reagent container for dyeing to check the number of punched holes, and taking out the FPC boards with different numbers for additional placement.

6) Utilize the hole inspection machine to carry out the secondary inspection to the FPC circuit board of taking out, prevent to punch on the contrast board and be too light, the seal of a government organization in old china, the error that causes to divide certified products and substandard product.

(III) advantageous effects

Compared with the prior art, the invention provides an improved method for FPC (flexible printed circuit) board drilling inspection, which has the following beneficial effects:

1. the improved method for the drilling inspection of the FPC circuit board comprises the steps of marking a control board after the FPC circuit board penetrates through a drilling machine when a drilling machine punches holes, reacting reagents with the reactants to enable the reactants to generate darker colors, blocking and removing the colors of the marked holes by an opaque shielding plate, rejecting the FPC circuit board with an incorrect corresponding number through the number of colored holes displayed on the control board, saving the time for checking the FPC circuit board by a hole checking machine, carrying out secondary inspection on the FPC circuit board taken out by the hole checking machine (preventing the contrast board from being too light in punching, unclear marks and caused errors), and accordingly dividing qualified products and defective products and guaranteeing the quality and the production progress of products.

2. According to the improved method for the drilling inspection of the FPC board, the FPC board and the comparison board are correspondingly produced, replacement and cleaning are carried out in time, the accumulation of drilling adhesion substances is reduced, a small blower is started, burrs and the like generated by drilling are blown, and the heat dissipation of a drill bit is accelerated.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a control board structure according to the present invention.

In the figure: 1 acrylic plate, 2 control plate, 3 reactant, 4 opaque shielding.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

1) and (4) checking the FPC circuit board and the comparison board thereof, arranging and collecting the FPC circuit board to be checked by the hole checking machine, and putting the FPC circuit board into a box to be checked to wait for the checking of the hole checking machine.

2) And flatly paving the FPC circuit board on the acrylic board, and inspecting by using a hole inspection machine.

3) And after the inspection of the hole inspection machine, dividing qualified products and defective products, and separately placing and marking the qualified products and the defective products.

4) After the hole inspection machine is qualified, the inspection personnel need arrange the FPC circuit boards of all batch numbers into the master batch, confirm the material numbers, the batch numbers and the quantity, and pack and deliver the products after electronic weighing.

Example two:

1) an acrylic plate is taken as a bottom plate, and a contrast plate is placed on the top of the acrylic plate.

2) And (4) paving the FPC on the comparison board, and fixing the FPC.

3) And starting a drilling machine, drilling the FPC board and the comparison board together, taking the comparison board as a reference, starting a small blower, blowing burrs and the like generated by drilling, and accelerating the heat dissipation of the drill bit.

4) And placing the punched FPC boards and the reference boards thereof in the collecting box in a one-to-one correspondence manner, and arranging and numbering.

5) And directly observing the number of the holes punched on the comparison board, and comparing the FPC board.

The invention has the beneficial effects that: when the drilling machine punches holes, the control board 2 is marked after penetrating through the FPC board, the reactant 3 is enabled to generate darker color by utilizing the reaction of the reagent and the reactant 3, the opaque shielding plate 4 blocks the marked holes and then displays the color, the number of colored holes displayed on the comparison board 2 is observed more obviously and rapidly, the FPC circuit board with the corresponding number not correct is rejected, the time for checking the FPC circuit board one by using a hole checking machine is saved, the FPC circuit board taken out is checked for the second time by using the hole checking machine (errors caused by too light punching, unclear marks and the like on the comparison board 2 are prevented), thereby divide certified products and substandard product, the quality and the production progress of guarantee product, through FPC circuit board and the corresponding production of contrast board 2, in time change and clear up, reduce the gathering of drilling adhesion thing, start small-size hair-dryer blows burr etc. that the drilling produced and accelerates the heat dissipation of drill bit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A method for testing FPC (flexible printed circuit) board drilling comprises an acrylic board (1), and is characterized in that: the device comprises an acrylic plate (1), a clamping groove is formed in the top of the acrylic plate (1), a contrast plate (2) is arranged inside the clamping groove, an opaque shielding plate (4) is fixedly connected to the top of the contrast plate (2), a reactant (3) is filled inside the contrast plate (2), and the color of the reactant (3) after reaction with a reagent is far darker than that of the opaque shielding plate (4);

the method specifically comprises the following steps:

1) taking an acrylic plate (1) as a bottom plate, placing the acrylic plate (1) on an operation platform, and then placing a comparison plate (2) on the top of the acrylic plate (1);

2) cleaning the comparison board (2), paving the FPC circuit board on the comparison board (2), and fixing the FPC circuit board;

3) starting a drilling machine, drilling the FPC circuit board and the comparison board (2) together, taking the comparison board (2) as a reference, starting a small blower, blowing burrs generated by drilling, accelerating the heat dissipation of a drill bit, and timely cleaning the accumulation of the operation platform;

4) taking out the acrylic boards (1), placing the punched FPC boards and the comparison boards (2) thereof in the collection box in a one-to-one correspondence manner, and arranging and numbering the FPC boards according to the sequence;

5) the contrast plate (2) is sequentially placed in a reagent container for dyeing, the number of punched holes is checked according to the number of colored holes displayed on the contrast plate, and FPC circuit boards with different numbers are taken out and placed in addition;

6) the FPC circuit board that utilizes the hole inspection machine to take out carries out the secondary inspection, prevents to punch on the contrast board (2) too lightly, and the seal of a government organization in old china, the error that causes to divide certified products and substandard product.