CN111787698B - Z-shaped slot hole machining method - Google Patents
Z-shaped slot hole machining method Download PDFInfo
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- CN111787698B CN111787698B CN202010668468.3A CN202010668468A CN111787698B CN 111787698 B CN111787698 B CN 111787698B CN 202010668468 A CN202010668468 A CN 202010668468A CN 111787698 B CN111787698 B CN 111787698B
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- board
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- shaped slot
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0214—Back-up or entry material, e.g. for mechanical drilling
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0221—Perforating
Abstract
The invention discloses a Z-shaped slot hole machining method, which specifically comprises the following steps: s1, cutting: cutting the FR4 board by using a full-automatic cutting machine, and cutting the FR4 board into a designed size; s2, drilling: the method comprises the steps of drilling a cut FR4 board by using a drilling machine, firstly processing a 1 red hole overlapping region from left to right in a processing sequence, then processing a 2 green region for removing burr holes, then processing a 3 blue hole overlapping region from left to right in a processing sequence, and relating to the technical field of slot hole processing. According to the Z-shaped slot hole machining method, when the drill point rotates forwards during drilling, overlapped drilling from a suspended position to an entity position is guaranteed, burrs can be prevented from being formed at the edge difference position of the overlapped hole according to mechanical stress analysis, so that the quality yield of products is greatly improved, the problem of manual burr repairing is avoided, the production efficiency of the products is improved, and finally the production cost of the products is greatly reduced.
Description
Technical Field
The invention relates to the technical field of slotted hole processing, in particular to a Z-shaped slotted hole processing method.
Background
The printed circuit board is also called as a printed circuit board and is a provider for electrical connection of electronic components, the printed circuit board is generally represented by a PCB (printed circuit board), but cannot be called as a PCB, and the development of the printed circuit board has been over 100 years; the design of the method is mainly layout design; the printed circuit board is not a general terminal product, so the definition of the name is slightly disordered, for example, a mother board for a personal computer is called a mainboard and cannot be directly called a circuit board, although the circuit boards exist in the motherboards, but are different, so the two related fields cannot be the same when the industry is evaluated. For another example, the news media is called an IC board because of the integrated circuit components mounted on the circuit board, but it is not substantially identical to the printed circuit board. In the manufacturing industry of the printed circuit board, the slotted holes are generally divided into short slotted holes, long slotted holes and special-shaped slotted holes, wherein a Z-shaped slotted hole belongs to one of the special-shaped slotted holes, but the common method for processing the Z-shaped slotted hole is to drill two deburring holes of 1 green and 2 white, then drill a 3 yellow overlapped hole area and a 4 red overlapped hole area (from left to right), and finally drill a 5 blue overlapped hole area (from left to right), as shown in fig. 2, in the processing process, a main shaft of a factor control drilling machine rotates clockwise, so that when the 3 yellow overlapped hole area and the 4 red overlapped hole area are drilled, a direction (right side) in which a drilling needle turns is an overhanging area when the drilling needle rotates and overlaps holes in the right direction.
According to the machining method, because the right side suspended area is not stressed in the drilling process in the machining process, burrs are easily formed at the difference position of the edges of the overlapped holes according to the mechanical principle, so that personnel are required to specially repair the burrs, the quality and the progress of a product are seriously affected in the production process, and the problems of high production cost, low efficiency, low quality and yield and the like are caused in the production process of the product.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a Z-shaped slot hole machining method, which solves the problems of high production cost, low efficiency and low quality yield.
In order to achieve the purpose, the invention is realized by the following technical scheme: a Z-shaped slot hole machining method specifically comprises the following steps:
s1, cutting: cutting the FR4 board by using a full-automatic cutting machine, and cutting the FR4 board into a designed size;
s2, drilling: drilling the cut FR4 board by using a drilling machine, wherein a 1 red hole overlapping region is machined firstly, the machining sequence is from left to right, then a 2 green region is machined to remove burrs, then a 3 blue hole overlapping region is machined, the machining sequence is from left to right, then a 4 white region is machined to remove burrs, then a 5 yellow hole overlapping region is machined, and the machining sequence is from right to left;
s3, copper plate deposition: metallizing the holes in the S2, and plating copper conductive layers on two sides of the FR4 board in an electroplating mode;
s4, pattern transfer: adhering a dry film on the copper conductive layer in S3;
s5, pattern electroplating: plating tin on the surface of the copper conducting layer by using an electroplating mode;
s6, alkaline etching: then removing the film, etching, and finally removing tin;
s7, detection: inspecting the processed FR4 board;
s8, solder resist preparation: covering a solder mask layer on the FR4 board;
s9, forming and packaging: the FR4 board is electrically tested, then OSP is carried out, then final inspection is carried out, and finally packaging and ex-warehouse are completed.
Preferably, in the step S1, the FR4 plate is a plate of a material specification that the resin material must be self-extinguishing after passing through a burning state.
Preferably, the hole metallization process in step S3 is a process in which each layer of printed wiring is plated with a conductive metal layer on the insulating hole wall by electroless plating and electroplating in the hole so as to make the conductive metal layers reliably connected with each other.
Preferably, the dry film in step S4 is polymerized by the irradiation of the ultraviolet rays to form a stable substance attached to the board surface for blocking the plating and etching.
Preferably, in the step S1, the model of the full-automatic cutting machine is YG-1325K 4.
Advantageous effects
The invention provides a Z-shaped slot hole machining method. Compared with the prior art, the method has the following beneficial effects:
the Z-shaped slot hole processing method comprises the following steps of S1: cutting the FR4 board by using a full-automatic cutting machine, and cutting the FR4 board into a designed size; s2, drilling: drilling the cut FR4 board by using a drilling machine, wherein a 1 red hole overlapping region is machined firstly, the machining sequence is from left to right, then a 2 green region is machined to remove burrs, then a 3 blue hole overlapping region is machined, the machining sequence is from left to right, then a 4 white region is machined to remove burrs, then a 5 yellow hole overlapping region is machined, and the machining sequence is from right to left; s3, copper plate deposition: metallizing the holes in the S2, and plating copper conductive layers on two sides of the FR4 board in an electroplating mode; s4, pattern transfer: adhering a dry film on the copper conductive layer in S3; s5, pattern electroplating: plating tin on the surface of the copper conducting layer by using an electroplating mode; s6, alkaline etching: then removing the film, etching, and finally removing tin; s7, detection: inspecting the processed FR4 board; s8, solder resist preparation: covering a solder mask layer on the FR4 board; s9, forming and packaging: the FR4 board is electrically tested, OSP is carried out, final inspection is carried out, packaging and ex-warehouse are finished finally, when a drill point rotates forwards during drilling, overlapped drilling from a suspended position to an entity position must be guaranteed, burrs are prevented from being formed at edge difference positions of overlapped holes according to mechanical stress analysis, so that the quality and the yield of products are greatly improved, meanwhile, the problem of manual burr repairing is avoided, the production efficiency of the products is improved, and the production cost of the products is greatly reduced finally.
Drawings
FIG. 1 is a flow chart of the process of the present invention;
FIG. 2 is a schematic view of a design sequence of the slotted drill strip of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1-2, the present invention provides a technical solution: a Z-shaped slot hole machining method specifically comprises the following steps:
s1, cutting: cutting the FR4 board by using a full-automatic cutting machine, and cutting the FR4 board into a designed size;
s2, drilling: drilling the cut FR4 board by using a drilling machine, wherein a 1 red hole overlapping region is machined firstly, the machining sequence is from left to right, then a 2 green region is machined to remove burrs, then a 3 blue hole overlapping region is machined, the machining sequence is from left to right, then a 4 white region is machined to remove burrs, then a 5 yellow hole overlapping region is machined, and the machining sequence is from right to left;
s3, copper plate deposition: metallizing the holes in the S2, and plating copper conductive layers on two sides of the FR4 board in an electroplating mode;
s4, pattern transfer: adhering a dry film on the copper conductive layer in S3;
s5, pattern electroplating: the surface of the copper conducting layer is plated with tin by an electroplating mode, and the tin plating and the tin alloy are coatings with good weldability and certain corrosion resistance and are widely applied to electronic components and printed circuit boards;
s6, alkaline etching: then a film stripping is performed followed by an etching, which is a technique that removes material using a chemical reaction or physical impact. The etching technology can be divided into wet etching and dry etching, and finally tin stripping is carried out;
s7, detection: inspecting the processed FR4 board;
s8, solder resist preparation: covering a solder mask layer on an FR4 board, wherein the solder mask layer is a part of a printed circuit board to be coated with green oil, and actually the solder mask layer uses negative film output, so that after the shape of the solder mask layer is mapped on the board, the solder mask layer is not coated with the green oil, but the copper sheet is exposed;
s9, forming and packaging: the FR4 board is electrically tested, and then OSP is carried out, wherein the OSP is a process for processing the surface of the copper foil of the printed circuit board and meets the RoHS instruction requirement, RoHS is a mandatory standard established by European Union legislation, and is named as an instruction for limiting the use of certain harmful components in electronic and electrical equipment, and then final inspection is carried out, and finally packaging and ex-warehouse are completed.
In the present invention, in step S1, the FR4 plate is a plate of a material specification that the resin material must be self-extinguishing in a burned state.
In the present invention, the hole metallization process in step S3 is a process in which each layer of printed wiring is plated with a layer of conductive metal on the insulating hole wall by using electroless plating and electroplating methods to make the conductive metal and the insulating hole wall reliably connected with each other.
In the present invention, the dry film in step S4 is polymerized by the irradiation of the ultraviolet rays to form a stable substance attached to the board surface for blocking the plating and etching.
In the present invention, in step S1, the model of the full-automatic cutting machine is YG-1325K 4.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (5)
1. A Z-shaped slot hole machining method is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, cutting: cutting the FR4 board by using a full-automatic cutting machine, and cutting the FR4 board into a designed size;
s2, drilling: drilling the cut FR4 board by using a drilling machine, wherein a 1 red hole overlapping region is machined firstly, the machining sequence is from left to right, then a 2 green region is machined to remove burrs, then a 3 blue hole overlapping region is machined, the machining sequence is from left to right, then a 4 white region is machined to remove burrs, then a 5 yellow hole overlapping region is machined, and the machining sequence is from right to left;
s3, copper plate deposition: metallizing the holes in the S2, and plating copper conductive layers on two sides of the FR4 board in an electroplating mode;
s4, pattern transfer: adhering a dry film on the copper conductive layer in S3;
s5, pattern electroplating: plating tin on the surface of the copper conducting layer by using an electroplating mode;
s6, alkaline etching: then removing the film, etching, and finally removing tin;
s7, detection: inspecting the processed FR4 board;
s8, solder resist preparation: covering a solder mask layer on the FR4 board;
s9, forming and packaging: the FR4 board is electrically tested, then OSP is carried out, then final inspection is carried out, and finally packaging and ex-warehouse are completed.
2. The method for machining the Z-shaped slot according to claim 1, wherein the method comprises the following steps: in step S1, the FR4 plate is a plate of a material standard that the resin material must be self-extinguishing when it is burned.
3. The method for machining the Z-shaped slot according to claim 1, wherein the method comprises the following steps: the hole metallization process in step S3 is a process in which each layer of printed wiring is plated with a layer of conductive metal on the insulating hole wall by using electroless plating and electroplating methods in the hole so as to make the conductive metal and the insulating hole wall reliably connected with each other.
4. The method for machining the Z-shaped slot according to claim 1, wherein the method comprises the following steps: the dry film in step S4 is polymerized by the irradiation of the ultraviolet rays to form a stable substance attached to the board surface for blocking the plating and etching.
5. The method for machining the Z-shaped slot according to claim 1, wherein the method comprises the following steps: in the step S1, the model of the full-automatic cutting machine is YG-1325K 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010668468.3A CN111787698B (en) | 2020-07-13 | 2020-07-13 | Z-shaped slot hole machining method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010668468.3A CN111787698B (en) | 2020-07-13 | 2020-07-13 | Z-shaped slot hole machining method |
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| CN111787698A CN111787698A (en) | 2020-10-16 |
| CN111787698B true CN111787698B (en) | 2021-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112616258B (en) * | 2021-01-12 | 2022-06-17 | 广东世运电路科技股份有限公司 | Circuit board negative film and processing method thereof |
| CN113784509A (en) * | 2021-07-30 | 2021-12-10 | 四川省华兴宇电子科技有限公司 | Forming processing method of special-shaped slotted hole of PCB |
| CN113784517B (en) * | 2021-08-18 | 2023-03-21 | 胜宏科技（惠州）股份有限公司 | Method for deburring of special-shaped hole of PCB |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004119761A (en) * | 2002-09-27 | 2004-04-15 | Hitachi Chem Co Ltd | Sheet for drilling printed wiring board, and method for drilling the printed wiring board using the sheet |
| CN102327918B (en) * | 2011-08-08 | 2013-06-12 | 上海天灵开关厂有限公司 | Non-cutting machining method of burrs of copper bar holes |
| TW201407912A (en) * | 2012-08-01 | 2014-02-16 | Chuang-Kuan Wang | Hidden wire structure with wood combined with electrical transmission wiring and manufacturing method thereof |
| CN103369846A (en) * | 2013-06-28 | 2013-10-23 | 昆山元茂电子科技有限公司 | Special-shaped hole deburring method |
| CN104289737B (en) * | 2013-07-18 | 2016-12-28 | 大族激光科技产业集团股份有限公司 | A kind of drilling method of superposition slotted eye |
| CN104493489B (en) * | 2014-12-10 | 2017-02-22 | 重庆市旺成科技股份有限公司 | Clutch pressure plate manufacturing equipment and drilling and tapping device thereof |
| CN104703395A (en) * | 2015-02-05 | 2015-06-10 | 叶校然 | Roll-to-roll production process of flexible circuit board connection sheet |
| CN106358374A (en) * | 2016-10-26 | 2017-01-25 | 广东骏亚电子科技股份有限公司 | Method for improving burrs in specially-shaped slotted hole |
| CN106385766B (en) * | 2016-11-02 | 2019-03-05 | 深圳市深联电路有限公司 | A kind of production method of PCB irregularly-shaped hole flash removed burr |
| CN109041435A (en) * | 2018-10-09 | 2018-12-18 | 昱鑫科技(苏州)有限公司 | A kind of the irregularly-shaped hole boring method and pcb board of pcb board |
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