CN102361535B - Flexible circuit board with impending splicing fingers and manufacturing method for flexible circuit board - Google Patents
Flexible circuit board with impending splicing fingers and manufacturing method for flexible circuit board Download PDFInfo
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- CN102361535B CN102361535B CN 201110356963 CN201110356963A CN102361535B CN 102361535 B CN102361535 B CN 102361535B CN 201110356963 CN201110356963 CN 201110356963 CN 201110356963 A CN201110356963 A CN 201110356963A CN 102361535 B CN102361535 B CN 102361535B
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Abstract
The invention discloses a flexible circuit board with impending splicing fingers and a manufacturing method for the flexible circuit board. The flexible circuit board comprises a plurality of splicing fingers arranged at intervals, wherein upper surfaces and lower surfaces of the plurality of the splicing fingers are connected with a covering film layer through a glue film; each splicing finger consists of pure copper layers, and is provided with an end part, a root part and a middle section for connecting the end part and the root part; the thickness of the end part and the root part is greater than that of the middle section; the front part of the end part of each splicing finger is impending to form a finger shape; and preferably, the thickness of the end part and/or the thickness of the root part of each splicing finger are/or is more than or equal to 0.2mm. The manufacturing method for the flexible circuit board mainly comprises the steps of selecting a pure copper coil with a corresponding thickness to manufacture the flexible circuit board, and etching for two times. By the flexible circuit and the manufacturing method, two surfaces of the splicing fingers can contact a contact point at the same time, the reliability of connection is improved, and meanwhile, local flexibility and local firmness of the circuit board are realized, and the flexible circuit board can meet requirement for use in different places.
Description
Technical field
The present invention relates to flexible PCB manufacturing technology field, especially a kind of flexible PCB and manufacture method thereof with suspension plugging fingers.
Background technology
Known flexible PCB with splicing fingers is to make by single face base material or two-sided base material, because the pure copper layer of single face base material or two-sided base material is thinner, the splicing fingers that forms at the edge of circuit board is soft, only could use at the back side of splicing fingers applying one deck strengthening course, therefore splicing fingers can only contact with the contact of socket by single face, and the reliability of connection is lower; Because the thickness of whole flexible PCB is the same, its suppleness is the same in addition, needs local soft, local hard use occasion inapplicable at some.
On the other hand, all need in the manufacture method of conventional flexible PCB through heavy copper facing operation, both having expended time in also increases cost; When selecting thicker copper foil base material, after the process etching, circuit can present trapezoidal shape in addition, and the copper layer of base material is thicker, and trapezoidal shape is more obvious, reduces the quality of flexible PCB.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of flexible PCB with suspension plugging fingers and manufacture method thereof, realize that the two-sided of splicing fingers can contact with the contact simultaneously, improve the reliability that connects, it is local soft, local hard that circuit board is realized, is fit to the needs that different occasions are used.
For achieving the above object, technical scheme of the present invention is: a kind of flexible PCB with suspension plugging fingers, comprise the splicing fingers that a plurality of intervals arrange, the top and bottom of a plurality of splicing fingers all are connected with the covering rete by glue-line, each splicing fingers is made of pure copper layer, each splicing fingers has an end, root and the interlude that is connected end and root, and the thickness of end and root is greater than the thickness of interlude, the anterior unsettled formation finger-shaped of the end of each splicing fingers.
Further, the root of described each splicing fingers is provided with the through hole of convenient welding usefulness.
Further, the part of the root of described each splicing fingers is exposed at the outside that covers rete, makes things convenient for the welding of splicing fingers root.
Thickness 〉=the 0.2mm of the end of preferred each splicing fingers.
Thickness 〉=the 0.2mm of the root of preferred each splicing fingers.
Preferred described covering rete is polyimide layer.
The present invention also provides the manufacture method of above-mentioned flexible PCB with suspension plugging fingers, and it may further comprise the steps at least:
(1), chooses the pure copper foil of same thickness according to the thickness of required splicing fingers end;
(2), hole in pure copper foil according to required fabrication hole and mechanism hole;
(3), carry out the etching first time in the front of pure copper foil, the end and the root that keep each splicing fingers are not etched, and the thickness that the other parts in pure copper foil front etch away is that the thickness of pure copper foil is deducted the predefined thickness of each splicing fingers interlude;
This step can be included in the positive back side of pure copper foil and all stick dry film, making first film according to the shape of splicing fingers end and root exposes, develops the front of pure copper foil, and expose fully in the back side of pure copper foil, then utilizes chemical medicinal liquid that etching is carried out in the front of pure copper foil;
(4), sticking coverlay through the front of etched pure copper foil for the first time, the front of pure copper foil utilizes glue-line to be connected with the covering rete;
This step should be noted carries out management and control to the glue amount of overflowing, so that the glue that overflows does not affect the normal use of circuit board;
(5), carry out the etching second time at the back side of pure copper foil, the end, interlude and the root that keep each splicing fingers are not etched, and the other parts of pure copper foil all etch away;
This step can be included in the back side of pure copper foil and stick dry film, stamp anti-etching printing ink at the covering rete that is connected with the pure copper foil front, make second film according to the shape of splicing fingers end, interlude and root and exposed, develop in the back side of pure copper foil, then utilize chemical medicinal liquid that etching is carried out at the back side of pure copper foil;
(6), sticking coverlay through the back side of etched pure copper foil for the second time, the back side of pure copper foil utilizes glue-line to be connected with the covering rete.
This step also should be noted carries out management and control to the glue amount of overflowing, so that the glue that overflows does not affect the normal use of circuit board.
The present invention also can comprise check, and circuit board is carried out surface treatment, and the steps such as die-cut profile are to adapt to different clients' demand.
The present invention is made of pure copper layer owing to each splicing fingers, each splicing fingers has an end, root and the interlude that is connected end and root, the thickness of end and root is greater than the thickness of interlude, the anterior unsettled formation finger-shaped of the end of each splicing fingers, the root of each splicing fingers is provided with the through hole of convenient welding usefulness, because the end of splicing fingers and the pure copper layer of root are thicker, this part is just harder, so that the end of splicing fingers can unsettledly be used, realize that the two-sided of splicing fingers can contact with the two-sided contact of socket simultaneously, improves the reliability that connects; On the other hand, because the interlude pure copper layer of splicing fingers is thinner, just soft, realize that circuit board is local soft, local hard herein, be fit to the needs that different occasions are used.
The present invention also has following advantage, and the one, plug-in unit finger sectional area is greater than the sectional area of conventional class flexible circuitry board package finger, so its withstanding current capability is better than conventional class flexible circuit board; The 2nd, in manufacturing process, adopt twice etch process, can avoid circuit to present trapezoidal shape, improve the quality of circuit board; The 3rd, do not need heavy copper facing in making, save production process one.
Description of drawings
Fig. 1 is vertical view of the present invention;
Fig. 2 is upward view of the present invention;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is first film schematic diagram;
Fig. 5 is second film schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and concrete execution mode the present invention is described in further detail.
Fig. 1, Fig. 2, shown in Figure 3, a kind of flexible PCB with suspension plugging fingers, comprise the splicing fingers 1 that a plurality of intervals arrange, the top and bottom of a plurality of splicing fingers 1 all are connected with covering rete 3 by glue-line 2, each splicing fingers 1 is made of pure copper layer, each splicing fingers 1 has an end 11, root 12 and the interlude 13 that is connected end 11 and root 12, the thickness of end 11 and root 12 is greater than the thickness of interlude 13, the anterior unsettled formation finger-shaped of the end 11 of each splicing fingers 1.
The root 12 of each splicing fingers 1 is provided with the through hole 121 of convenient welding usefulness.
The part of the root 12 of each splicing fingers 1 is exposed at the outside that covers rete 3.
Thickness 〉=the 0.2mm of the end 11 of preferred each splicing fingers 1.
Thickness 〉=the 0.2mm of the root 12 of preferred each splicing fingers 1.
Preferred described covering rete 3 is polyimide layer.
Above-mentioned flexible PCB can form with following manufacture method manufacturing, and it may further comprise the steps at least:
(1), first choosing the pure copper foil of same thickness according to the thickness of required splicing fingers 1 end 11, is 0.2mm such as the Thickness Design of splicing fingers 1 end 11, and then the thickness of pure copper foil can be selected 0.2mm;
(2), hole in pure copper foil according to required fabrication hole and mechanism hole, as bore the through hole 121 of splicing fingers 1 root 12 in pure copper foil;
(3), the etching first time is carried out in front in pure copper foil, the end 11 and the root 12 that keep each splicing fingers 1 are not etched, the thickness that the other parts in pure copper foil front etch away is that the thickness of pure copper foil is deducted each splicing fingers 1 interlude 13 predefined thickness, thickness such as pure copper foil is selected 0.2mm, the thickness of splicing fingers 1 interlude 13 is redefined for 0.05mm, then the thickness that etches away of the other parts in pure copper foil front is 0.15um, certainly as some need be set than thickness portion in splicing fingers interlude 13 parts, this part can be not etched yet or thickness as required carry out etching;
The thickness that etches away for good this part of management and control, can be through after developing, measure the thickness of pure copper foil with micrometer, after etching, again measure the thickness of pure copper foil, and by the etched speed of control, can effectively measuring for the first time, whether etched thickness meets the requirements;
When first time etching, can all stick dry film at the positive back side of pure copper foil, shape according to splicing fingers 1 end 11 and root 12 is made first film 10, as shown in Figure 4, utilize the front of 10 pairs of pure copper foil of first film to expose, develop, and expose fully in the back side of pure copper foil, then utilizes chemical medicinal liquid that etching is carried out in the front of pure copper foil;
(4), sticking coverlay through the front of etched pure copper foil for the first time, the front of pure copper foil utilizes glue-line 2 to be connected with covering rete 3;
This step should be noted carries out management and control to the glue amount of overflowing, so that the glue that overflows does not affect the normal use of circuit board;
(5), carry out the etching second time at the back side of pure copper foil, the end 11, interlude 13 and the root 12 that keep each splicing fingers 1 are not etched, and the other parts of pure copper foil all etch away;
This step can be included in the back side of pure copper foil and stick dry film, stamp anti-etching printing ink at the covering rete 3 that is connected with the pure copper foil front, shape according to splicing fingers 1 end 11, interlude 13 and root 12 is made second film 20, as shown in Figure 5, utilize the back side of 20 pairs of pure copper foil of second film to expose, develop, then utilize chemical medicinal liquid that etching is carried out at the back side of pure copper foil;
(6), sticking coverlay through the back side of etched pure copper foil for the second time, the back side of pure copper foil utilizes glue-line to be connected with the covering rete;
This step also should be noted carries out management and control to the glue amount of overflowing, so that the glue that overflows does not affect the normal use of circuit board.
In addition in order to make the root weld of splicing fingers 1 easier, can carve except the partial coverage rete 3 that covers splicing fingers 1 root 12, make the root 12 of splicing fingers 1 be exposed at outside the covering rete 3 demand that at last also can be different according to the client, carry out circuit board surface and process die-cut profile etc.
Below by reference to the accompanying drawings embodiments of the present invention have been done detailed description, but the present invention is not limited to above-mentioned execution mode, the change that those skilled in the art does to be equal to by claim all falls into the protection range of this case.
Claims (10)
1. flexible PCB with suspension plugging fingers, comprise the splicing fingers that a plurality of intervals arrange, the top and bottom of a plurality of splicing fingers all are connected with the covering rete by glue-line, each splicing fingers is made of pure copper layer, it is characterized in that: each splicing fingers has an end, root and the interlude that is connected end and root, the thickness of end and root is greater than the thickness of interlude, the anterior unsettled formation finger-shaped of the end of each splicing fingers.
2. a kind of flexible PCB with suspension plugging fingers according to claim 1 is characterized in that: the root of described each splicing fingers is provided with the through hole of convenient welding usefulness.
3. a kind of flexible PCB with suspension plugging fingers according to claim 1 is characterized in that: the part of the root of described each splicing fingers is exposed at the outside that covers rete.
4. according to claim 1 to 3 each described a kind of flexible PCBs with suspension plugging fingers, it is characterized in that: the thickness 〉=0.2mm of the end of described each splicing fingers.
5. according to claim 1 to 3 each described a kind of flexible PCBs with suspension plugging fingers, it is characterized in that: the thickness 〉=0.2mm of the root of described each splicing fingers.
6. according to claim 1 to 3 each described a kind of flexible PCBs with suspension plugging fingers, it is characterized in that: described covering rete is polyimide layer.
7. the manufacture method of each described flexible PCB with suspension plugging fingers of a claim 1 to 6, it may further comprise the steps at least:
(1), chooses the pure copper foil of same thickness according to the thickness of required splicing fingers end;
(2), hole in pure copper foil according to required fabrication hole and mechanism hole;
(3), carry out the etching first time in the front of pure copper foil, the end and the root that keep each splicing fingers are not etched, and the thickness that the other parts in pure copper foil front etch away is that the thickness of pure copper foil is deducted the predefined thickness of each splicing fingers interlude;
(4), sticking coverlay through the front of etched pure copper foil for the first time, the front of pure copper foil utilizes glue-line to be connected with the covering rete;
(5), carry out the etching second time at the back side of pure copper foil, the end, interlude and the root that keep each splicing fingers are not etched, and the other parts of pure copper foil all etch away;
(6), sticking coverlay through the back side of etched pure copper foil for the second time, the back side of pure copper foil utilizes glue-line to be connected with the covering rete.
8. manufacture method according to claim 7, it is characterized in that: carry out the positive back side that etched step for the first time is included in pure copper foil in the front of pure copper foil and all stick dry film, making first film according to the shape of splicing fingers end and root exposes, develops the front of pure copper foil, and expose fully in the back side of pure copper foil, then utilizes chemical medicinal liquid that etching is carried out in the front of pure copper foil.
9. manufacture method according to claim 7, it is characterized in that: carry out the back side that etched step for the second time is included in pure copper foil at the back side of pure copper foil and stick dry film, stamp anti-etching printing ink at the covering rete that is connected with the pure copper foil front, make second film according to the shape of splicing fingers end, interlude and root and exposed, develop in the back side of pure copper foil, then utilize chemical medicinal liquid that etching is carried out at the back side of pure copper foil.
10. manufacture method according to claim 7, it is characterized in that: also comprise the step that the glue amount of overflowing is carried out management and control in the step of sticking coverlay through the front of etched pure copper foil for the first time with in the step of sticking coverlay through the back side of etched pure copper foil for the second time, so that the glue that overflows does not affect the normal use of circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110356963 CN102361535B (en) | 2011-11-11 | 2011-11-11 | Flexible circuit board with impending splicing fingers and manufacturing method for flexible circuit board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110356963 CN102361535B (en) | 2011-11-11 | 2011-11-11 | Flexible circuit board with impending splicing fingers and manufacturing method for flexible circuit board |
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| CN102361535A CN102361535A (en) | 2012-02-22 |
| CN102361535B true CN102361535B (en) | 2013-10-30 |
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| US5444188A (en) * | 1992-01-14 | 1995-08-22 | Nippon Mektron, Ltd. | Flexible circuit wiring board and method of producing the same |
| CN201114988Y (en) * | 2007-08-21 | 2008-09-10 | 比亚迪股份有限公司 | A flexible printed circuit board connector |
| CN101309556A (en) * | 2008-07-08 | 2008-11-19 | 深圳崇达多层线路板有限公司 | Production method of circuit board having long and short golden finger |
| CN101511147A (en) * | 2008-04-23 | 2009-08-19 | 深圳市精诚达电路有限公司 | Physical design for four-layer soft and hard combined board |
| CN101636039A (en) * | 2008-07-22 | 2010-01-27 | 南亚电路板股份有限公司 | Printed circuit board before being formed and cut and manufacturing method thereof |
| CN201557322U (en) * | 2009-11-20 | 2010-08-18 | Tcl集团股份有限公司 | Flexible circuit board |
| CN101835351A (en) * | 2010-04-08 | 2010-09-15 | 梅州市志浩电子科技有限公司 | Manufacture process of sectional golden finger |
| CN101938883A (en) * | 2010-08-26 | 2011-01-05 | 厦门弘信电子科技有限公司 | Single-side double contact flexible circuit board and making method thereof |
| CN202335069U (en) * | 2011-11-11 | 2012-07-11 | 厦门爱谱生电子科技有限公司 | Flexible circuit board with suspension plugging fingers |
-
2011
- 2011-11-11 CN CN 201110356963 patent/CN102361535B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444188A (en) * | 1992-01-14 | 1995-08-22 | Nippon Mektron, Ltd. | Flexible circuit wiring board and method of producing the same |
| CN201114988Y (en) * | 2007-08-21 | 2008-09-10 | 比亚迪股份有限公司 | A flexible printed circuit board connector |
| CN101511147A (en) * | 2008-04-23 | 2009-08-19 | 深圳市精诚达电路有限公司 | Physical design for four-layer soft and hard combined board |
| CN101309556A (en) * | 2008-07-08 | 2008-11-19 | 深圳崇达多层线路板有限公司 | Production method of circuit board having long and short golden finger |
| CN101636039A (en) * | 2008-07-22 | 2010-01-27 | 南亚电路板股份有限公司 | Printed circuit board before being formed and cut and manufacturing method thereof |
| CN201557322U (en) * | 2009-11-20 | 2010-08-18 | Tcl集团股份有限公司 | Flexible circuit board |
| CN101835351A (en) * | 2010-04-08 | 2010-09-15 | 梅州市志浩电子科技有限公司 | Manufacture process of sectional golden finger |
| CN101938883A (en) * | 2010-08-26 | 2011-01-05 | 厦门弘信电子科技有限公司 | Single-side double contact flexible circuit board and making method thereof |
| CN202335069U (en) * | 2011-11-11 | 2012-07-11 | 厦门爱谱生电子科技有限公司 | Flexible circuit board with suspension plugging fingers |
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| CN102361535A (en) | 2012-02-22 |
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