CN112969313A - PTH (plated through hole) half-hole manufacturing method - Google Patents
PTH (plated through hole) half-hole manufacturing method Download PDFInfo
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- CN112969313A CN112969313A CN202110133179.8A CN202110133179A CN112969313A CN 112969313 A CN112969313 A CN 112969313A CN 202110133179 A CN202110133179 A CN 202110133179A CN 112969313 A CN112969313 A CN 112969313A
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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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/095—Conductive through-holes or vias
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention provides a PTH half-hole manufacturing method. The manufacturing method of the PTH half-hole comprises the following steps: s1: defining half-holes: when the number of the continuous half holes is less than or equal to 3 and the aperture of the half hole is more than 1.75mm and less than 8mm, the finished gong is obtained; when the number of continuous half holes is more than 3 and the aperture of the half hole is more than 0.45 and less than or equal to 1.75mm, etching the first gong by alkali; s2: and (3) manufacturing a half hole: aiming at the finished gong: when the copper cutting position is arc-shaped, the cutter is arranged at the copper cutting position of the half hole; when the copper cutting position is a right angle, designing a routing of a milling cutter at the copper cutting position of the half hole by 45 degrees, and cutting into the right angle for 3mil so as to avoid generating burrs when an outer frame is milled; aiming at the alkali etching of the previous gong: and according to different diameters of the semi-holes of the finished product, performing copper sheet drilling, waste material drawing, coarse routing and fine routing. The PTH half-hole manufacturing method provided by the invention has the advantages of high working efficiency and cost saving.
Description
Technical Field
The invention relates to the technical field of circuit boards, in particular to a PTH half-hole manufacturing method.
Background
Most of half-hole plates manufactured in the existing industry are abnormal in quality due to half-hole burrs and the fact that half-holes are copper-free, and various methods for solving the half-hole burrs are provided. The conventional method for preparing the semi-porous plate comprises the following steps: drilling, electroplating, wiring, two copper, tin-plating, forming, first routing, film stripping, tin stripping and etching, wherein when the first routing is formed, definition is not made on whether half holes really need to be formed or not, and a control method is not provided for half-hole burrs and half holes without copper. Therefore, a part of the plate which can be used for placing the finished product and can be gong out is also placed, and the cost is wasted. Secondly, a definite management and control method is also needed for half-hole burrs and half-holes without copper.
Therefore, there is a need to provide a new method for manufacturing a PTH half-hole, which solves the above problems.
Disclosure of Invention
The invention aims to provide a PTH half-hole manufacturing method which is high in working efficiency and cost-saving.
In order to solve the technical problem, the method for manufacturing the PTH half-hole provided by the invention comprises the following steps of:
s1: defining half-holes:
when the number of the continuous half holes is less than or equal to 3 and the aperture of the half hole is more than 1.75mm and less than 8mm, the finished gong is obtained;
when the number of continuous half holes is more than 3 and the aperture of the half hole is more than 0.45 and less than or equal to 1.75mm, etching the first gong by alkali;
s2: and (3) manufacturing a half hole:
aiming at the finished gong: when the copper cutting position is arc-shaped, the cutter is arranged at the copper cutting position of the half hole; when the copper cutting position is a right angle, designing a routing of a milling cutter at the copper cutting position of the half hole by 45 degrees, and cutting into the right angle for 3mil so as to avoid generating burrs when an outer frame is milled;
aiming at the alkali etching of the previous gong: and according to different diameters of the semi-holes of the finished product, performing copper sheet drilling, waste material drawing, coarse routing and fine routing.
Preferably, in the step S1, when the aperture of the half hole is more than 1.75mm and less than D and less than 3mm, 1.2 gong-cutter positive and negative gongs are adopted; when the aperture of the half hole is less than or equal to 3mm and D is less than 8mm, a 1.4 milling cutter is adopted for milling in the positive and negative directions.
Preferably, in step S2:
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong; the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling; the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong; the diameter of the semi-hole of the finished product is less than 1/2, the band milling cutter sequence comprises copper sheet drilling, waste material pulling, coarse milling and fine milling, a single side of the semi-hole of one milling is reserved for 4mil, and the semi-hole of the finished product milling is reserved for fine milling;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling; the diameter of the semi-hole of the finished product is less than 1/2, and the band milling cutter sequence comprises copper sheet drilling, scrap pulling, coarse milling and fine milling.
Preferably, when the copper cutting position in the step S2 is a right angle, the routing path at the copper cutting position of the half hole is designed to be 45 °, and the distance between the lower cutting point in the hole and the hole copper is more than or equal to 0.2 mm.
Preferably, the diameter of the gong cutter is 1.0-1.4 mm.
Preferably, the step of pulling the waste materials is only to pull the substrate on the opposite side of the half hole to achieve the dust removal effect, and the waste materials are removed by using a gong knife.
Preferably, the half holes can be contacted when the distance between the half holes is less than 1.2mm, and the type of the milling cutter is 1.0 mm.
Preferably, the gong sword is preferred to be guaranteed not to gong brokenly when gong half a hole, and waste material and thick gong sword are 0.1mm with half a hole limit minimum separation distance.
Preferably, in the step of drilling the copper sheet, the diameter of the milling cutter is 1.0mm, the angle is 45 degrees, and the cutting depth is 3 mil.
Preferably, in the copper sheet step, adjacent half holes are arranged up and down, and when the minimum distance between the upper part and the lower part is less than 1.2mm, the half holes are drilled in a PTH groove mode.
Compared with the related art, the PTH half-hole manufacturing method provided by the invention has the following beneficial effects:
the invention provides a PTH half-hole manufacturing method, which can enable a part of PTH half-holes which can be finished to be milled without a milling process, greatly saves cost, has no copper on half-hole burrs and half-holes, and establishes a good control method.
Drawings
FIG. 1 is a schematic structural diagram of a PTH half-hole manufacturing method according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the construction of the drill bit assembly shown in FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is a schematic view of the bit mount of FIG. 1;
fig. 5 is a schematic structural view of the mounting block shown in fig. 1.
Reference numbers in the figures: 1. drilling equipment, 2, drill bit mount pad, 3, mounting groove, 4, drill bit subassembly, 5, installation piece, 6, drill bit, 7, wedge draw-in groove, 8, through-hole, 9, slide bar, 10, wedge fixture block, 11, lead screw, 12, handle, 13, bearing, 14, the spacing hole of bar, 15, stopper, 16, constant head tank, 17, locating piece.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
The first embodiment:
in an embodiment of the invention, a PTH half-hole manufacturing method comprises the following steps:
s1: defining half-holes:
when the number of the continuous half holes is less than or equal to 3 and the aperture of the half hole is more than 1.75mm and less than 8mm, the finished gong is obtained;
when the number of continuous half holes is more than 3 and the aperture of the half hole is more than 0.45 and less than or equal to 1.75mm, etching the first gong by alkali;
s2: and (3) manufacturing a half hole:
aiming at the finished gong: when the copper cutting position is arc-shaped, the cutter is arranged at the copper cutting position of the half hole; when the copper cutting position is a right angle, designing a routing of a milling cutter at the copper cutting position of the half hole by 45 degrees, and cutting into the right angle for 3mil so as to avoid generating burrs when an outer frame is milled;
aiming at the alkali etching of the previous gong: and according to different diameters of the semi-holes of the finished product, performing copper sheet drilling, waste material drawing, coarse routing and fine routing.
In the step S1, when the aperture of the half hole is more than 1.75mm and less than D and less than 3mm, a 1.2 gong knife is adopted for gong in a positive and negative way; when the aperture of the half hole is less than or equal to 3mm and D is less than 8mm, a 1.4 milling cutter is adopted for milling in the positive and negative directions.
In the step S2:
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong;
the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling;
the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong;
the diameter of the semi-hole of the finished product is less than 1/2, the band milling cutter sequence comprises copper sheet drilling, waste material pulling, coarse milling and fine milling, a single side of the semi-hole of one milling is reserved for 4mil, and the semi-hole of the finished product milling is reserved for fine milling;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling;
the diameter of the semi-hole of the finished product is less than 1/2, and the band milling cutter sequence comprises copper sheet drilling, scrap pulling, coarse milling and fine milling.
And when the copper cutting position in the step S2 is a right angle, designing a routing path of a milling cutter at the copper cutting position of the half hole by 45 degrees, wherein the distance between the lower cutting point in the hole and the copper in the hole is more than or equal to 0.2 mm.
The diameter of the routing knife is 1.0-1.4 mm.
And in the step of pulling the waste, only the semi-hole opposite side substrate is pulled to achieve the dust removal effect, and the waste is removed by using a milling cutter.
And when the distance between the half holes is less than 1.2mm, the half holes can be contacted, and the type of the milling cutter is 1.0 mm.
The gong sword is preferred when gong half-hole to guarantee not gong brokenly, and waste material and thick gong sword and half-hole limit minimum separation distance are 0.1 mm.
And in the step of drilling the copper sheet, the diameter of the milling cutter is 1.0mm, the angle is 45 degrees, and the cutting depth is 3 mil.
And in the copper sheet step, adjacent half holes are arranged up and down, and when the minimum distance between the upper part and the lower part is less than 1.2mm, the half holes are drilled in a PTH (plated through hole) mode.
A detailed determination and preparation method of PTH half-hole is as follows:
compared with the related art, the PTH half-hole manufacturing method provided by the invention has the following beneficial effects:
the invention provides a PTH half-hole manufacturing method, which can enable a part of PTH half-holes which can be finished to be milled without a milling process, greatly saves cost, has no copper on half-hole burrs and half-holes, and establishes a good control method.
Second embodiment:
based on the PTH half-hole manufacturing method provided in the first embodiment of the present application, a second embodiment of the present application proposes another PTH half-hole manufacturing method. The second embodiment is merely a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.
The second embodiment of the present invention will be further described with reference to the drawings and the following description.
Referring to fig. 1 to 5, the present embodiment is different from the first embodiment in that a drilling device 1 is used to drill a hole, a drill bit mounting seat 2 is installed on an output shaft of the drilling device 1, an installation groove 3 is formed in a bottom side of the drill bit mounting seat 2, a drill bit assembly 4 is installed in the installation groove 3, and a bottom end of the drill bit assembly 4 extends out of the installation groove 3.
The drill bit assembly 4 comprises an installation block 5 and a drill bit 6, and wedge-shaped clamping grooves 7 are formed in two sides of the installation block 5.
Through-hole 8 has all been seted up on the both sides inner wall of mounting groove 3, slidable mounting has slide bar 9 in the through-hole 8, the one end of slide bar 9 extends to fixed mounting has wedge fixture block 10 in the mounting groove 3, wedge fixture block 10 with 7 looks adaptations of wedge draw-in groove, lead screw 11 is installed to the 8 internal rotations in through-hole, lead screw 11 with slide bar 9 thread bush, the one end of lead screw 11 extends to 8 outer and fixed mounting of through-hole has handle 12.
And a bearing 13 is arranged in the through hole 8, and the inner ring of the bearing 13 is fixedly sleeved with the screw rod 11.
A strip-shaped limiting hole 14 is formed in the inner wall of the top side of the through hole 8, a limiting block 15 is fixedly mounted on the top side of the sliding rod 9, and the limiting block 15 is connected with the strip-shaped limiting hole 14 in a sliding mode.
Positioning grooves 16 are formed in the inner walls of the two sides of the mounting groove 3, the bottom sides of the positioning grooves 16 are provided with openings, positioning blocks 17 are fixedly mounted on the two sides of the mounting block 5, and the positioning blocks 17 are matched with the positioning grooves 16.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A PTH half-hole manufacturing method is characterized by comprising the following steps:
s1: defining half-holes:
when the number of the continuous half holes is less than or equal to 3 and the aperture of the half hole is more than 1.75mm and less than 8mm, the finished gong is obtained;
when the number of continuous half holes is more than 3 and the aperture of the half hole is more than 0.45 and less than or equal to 1.75mm, the hole is before alkaline etching
Routing a gong;
s2: and (3) manufacturing a half hole:
aiming at the finished gong: when the copper cutting position is arc-shaped, the cutter is arranged at the copper cutting position of the half hole; when the copper cutting position is a right angle, designing a routing of a milling cutter at the copper cutting position of the half hole by 45 degrees, and cutting into the right angle for 3mil so as to avoid generating burrs when an outer frame is milled;
aiming at the alkali etching of the previous gong: and according to different diameters of the semi-holes of the finished product, performing copper sheet drilling, waste material drawing, coarse routing and fine routing.
2. The method for manufacturing the PTH half-hole of claim 1, wherein in the step S1, when the hole diameter of the half-hole is 1.75mm < D < 3mm, a 1.2 gong-knife is used for gong forward and backward; when the aperture of the half hole is less than or equal to 3mm and D is less than 8mm, a 1.4 milling cutter is adopted for milling in the positive and negative directions.
3. The method of fabricating a PTH half-hole of claim 1, wherein in step S2:
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong; the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.45mm and less than or equal to 0.8mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling; the radius is changed to 1/2 when the semi-pore diameter of the finished product is less than 1/2;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the finished surface is more than or equal to 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, the band cutting sequence of the gong is scrap pulling, coarse gong and fine gong, the single side of the half hole of one gong is reserved for 4 mils, and the half hole of the finished product gong is fine gong; the diameter of the semi-hole of the finished product is less than 1/2, the band milling cutter sequence comprises copper sheet drilling, waste material pulling, coarse milling and fine milling, a single side of the semi-hole of one milling is reserved for 4mil, and the semi-hole of the finished product milling is reserved for fine milling;
when the aperture of the half hole is more than 0.8mm and less than or equal to 1.75mm, the copper thickness of the surface of the finished product is less than 70um, the diameter of the half hole of the finished product is more than or equal to 1/2, and the milling and belt cutting sequence is scrap pulling, coarse milling and fine milling; the diameter of the semi-hole of the finished product is less than 1/2, and the band milling cutter sequence comprises copper sheet drilling, scrap pulling, coarse milling and fine milling.
4. The method for manufacturing PTH half-holes of claim 1, wherein when the copper cutting part is a right angle in step S2, the routing path is designed to be 45 ° at the copper cutting part of the half-hole, and the distance between the lower cutting point in the hole and the hole copper is greater than or equal to 0.2 mm.
5. The method of manufacturing a PTH half-hole of claim 1, wherein the routing diameter is 1.0-1.4 mm.
6. The method of claim 1, wherein the step of removing the waste material comprises removing the waste material by pulling only the substrate opposite the half via.
7. The method of making PTH half-holes of claim 6, wherein said half-hole contact occurs at a pitch of < 1.2mm and a 1.0mm gong cutter is used.
8. The method for manufacturing the PTH half-hole according to claim 1, wherein the milling cutter preferentially ensures not to mill the half-hole, and the minimum distance between the waste material and the coarse milling cutter and the half-hole edge is 0.1 mm.
9. The method of manufacturing a PTH half-hole of claim 1, wherein in the step of drilling the copper sheet, the routing diameter is 1.0mm, the angle is 45 degrees, and the cutting depth is 3 mil.
10. The method of claim 1 wherein in the step of forming the PTH half-holes, the copper skin is formed by drilling the half-holes as PTH slots in upper and lower rows of adjacent half-holes with a minimum distance of less than 1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133179.8A CN112969313B (en) | 2021-02-03 | 2021-02-03 | PTH (plated through hole) half-hole manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133179.8A CN112969313B (en) | 2021-02-03 | 2021-02-03 | PTH (plated through hole) half-hole manufacturing method |
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| CN112969313A true CN112969313A (en) | 2021-06-15 |
| CN112969313B CN112969313B (en) | 2023-02-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115958226A (en) * | 2023-01-10 | 2023-04-14 | 湖北全成信精密电路有限公司 | Improved process for burr by using forming auxiliary groove |
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| FR1309298A (en) * | 1961-10-02 | 1962-11-16 | Machining process for half bores | |
| CN102615318A (en) * | 2012-04-11 | 2012-08-01 | 景旺电子（深圳）有限公司 | Routing method for PCB (printed circuit board) |
| CN103179791A (en) * | 2011-12-21 | 2013-06-26 | 北大方正集团有限公司 | Metal half-hole forming method and printed circuit board manufacture method |
| CN108237253A (en) * | 2018-02-05 | 2018-07-03 | 惠州联创宏科技有限公司 | A kind of high non-metallic half bore CNC processing methods of TG planks PCB |
| CN110972396A (en) * | 2019-11-22 | 2020-04-07 | 厦门鸿鹭联创工具有限公司 | Forming and processing method for printed circuit board with semi-copper hole |
| CN112040652A (en) * | 2020-08-24 | 2020-12-04 | 胜宏科技（惠州）股份有限公司 | Forming method for improving PTH half-hole burrs |
-
2021
- 2021-02-03 CN CN202110133179.8A patent/CN112969313B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1309298A (en) * | 1961-10-02 | 1962-11-16 | Machining process for half bores | |
| CN103179791A (en) * | 2011-12-21 | 2013-06-26 | 北大方正集团有限公司 | Metal half-hole forming method and printed circuit board manufacture method |
| CN102615318A (en) * | 2012-04-11 | 2012-08-01 | 景旺电子（深圳）有限公司 | Routing method for PCB (printed circuit board) |
| CN108237253A (en) * | 2018-02-05 | 2018-07-03 | 惠州联创宏科技有限公司 | A kind of high non-metallic half bore CNC processing methods of TG planks PCB |
| CN110972396A (en) * | 2019-11-22 | 2020-04-07 | 厦门鸿鹭联创工具有限公司 | Forming and processing method for printed circuit board with semi-copper hole |
| CN112040652A (en) * | 2020-08-24 | 2020-12-04 | 胜宏科技（惠州）股份有限公司 | Forming method for improving PTH half-hole burrs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115958226A (en) * | 2023-01-10 | 2023-04-14 | 湖北全成信精密电路有限公司 | Improved process for burr by using forming auxiliary groove |
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| CN112969313B (en) | 2023-02-17 |
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Address after: 413000 Changchun Road, Ziyang District, Yiyang City, Hunan Province Applicant after: Hunan haoyijia circuit board Co.,Ltd. Address before: 413000 Changchun Road, Ziyang District, Yiyang City, Hunan Province Applicant before: Hunan Haoyijia Circuit Board Co.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |