CN201238419Y - Two-sided flexible copper-covered plate - Google Patents
Two-sided flexible copper-covered plate Download PDFInfo
- Publication number
- CN201238419Y CN201238419Y CNU200820093958XU CN200820093958U CN201238419Y CN 201238419 Y CN201238419 Y CN 201238419Y CN U200820093958X U CNU200820093958X U CN U200820093958XU CN 200820093958 U CN200820093958 U CN 200820093958U CN 201238419 Y CN201238419 Y CN 201238419Y
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- copper foil
- glue
- polyimide layer
- coated
- double
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Abstract
The utility model relates to a double-sided flexible copper-clad laminate (FCCL), comprising a polyimide layer, flat rolled copper foil laminated on one side of the polyimide layer, and electrolytic copper foil laminated on the other side of the polyimide layer. The double-sided flexible copper-clad laminate is a flexible copper-clad laminate with three layers and double sides, and the two sides of the polyimide layer adopt two types of the copper foil, wherein, one side adopts the electrolytic copper foil with low cost and the other side adopts the flat rolled copper foil with excellent flexure performance, thus reducing the cost and having excellent flexure performance at the same time.
Description
Technical field
The utility model relates to a kind of flexibility coat copper plate, relates in particular to a kind of double side flexible copper coated board.
Background technology
Because the frivolous miniaturization of electronic product and the solid of electronic unit are installed, and make flex circuit application be widely used in the electronic information flexible connection of electronic product.Because the folding resistance and the flexibility of double-sided wiring board are very poor, usually the circuit that double-sided wiring board is not used for frequent deflection connects, in circuit design, generally adopt single-side coated copper plate or Copper Foil of double face copper etching is used for the circuit of high flexible song, perhaps adopt and separate single face circuit or rigid-flexible combined circuit plate.In general, the circuit of installing as bending is connected the employing electrolytic copper foil with circuit, and for the circuit that often dynamically connects, mostly adopts rolled copper foil or high anti-flexible electrolytic copper foil.Yet rolled copper foil or high flexible electrolytic copper foil approximately are several times of prices of common electrolytic copper foil, so manufacturer sacrifices reliability in order to save cost, can adopt the electrolysis paper tinsel to produce wiring board as much as possible.Conductive current for holding wire in the electronic product is little in addition, generally lead is made fine-line in the design, and the power line conductive current is big, requires conductor thickness big and wide.Processing causes difficulty to FPCB for this.
The way of industry double face copper all is to adopt the copper foil material Copper Foil identical with thickness of symmetry, promptly two-sided electrolysis paper tinsel or the two-sided rolled copper foil that all adopts of all adopting now.Yet two-sided calendering plate price is very high, and the flexibility of two-sided electrolysis paper tinsel is very poor.Thereby how effectively solving the contradiction of Cost And Performance of these two kinds of materials and the problem of two-sided copper thickness is the problem that those skilled in the art pays close attention to.
The utility model content
The purpose of this utility model provides a kind of double side flexible copper coated board, adopt two kinds of dissimilar copper foil materials to make, wherein, one side adopts electrolytic copper foil, its cost is lower, another side adopts rolled copper foil, has good flexural property, can still have good flexural property when cost reduces.When the FPC design needs, can use the Copper Foil of different-thickness in addition, can satisfy fine line use thin copper foil in the FPCB processing, heavy current circuit adopts thick Copper Foil, thereby reduces the difficulty of FPCB processing.
For achieving the above object, the utility model provides a kind of double side flexible copper coated board, be two-sided three layers of flexibility coat copper plate that cover dissimilar Copper Foils, comprise: polyimide layer, the electrolytic copper foil that is pressed on the laminated rolled copper foil of polyimides and is pressed on the polyimide layer another side.
The beneficial effects of the utility model: two kinds of dissimilar copper foil materials are adopted on the two sides in polyimides, one side adopts electrolytic copper foil, its cost is lower, another side adopts rolled copper foil, has good flexural property, effectively workout cost and flexibility contradiction between the two makes it still have good flexural property when cost reduces.Simultaneously, because electrolytic copper foil is more easy to process than the good rigidly of calendering Copper Foil, thereby its qualification rate is than the qualification rate height of pure calendering copper coin, and the effective reduction of the cost of raw material and the rate of good quality rate of the course of processing also make overall cost be reduced.
Description of drawings
Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and other beneficial effects apparent by embodiment of the present utility model is described in detail.
In the accompanying drawing,
Fig. 1 is the schematic diagram of double side flexible copper coated board of the present utility model.
Embodiment
As shown in Figure 1, the utility model double side flexible copper coated board, be two-sided three layers of flexibility coat copper plate that cover dissimilar Copper Foils, comprise polyimide layer 2, be pressed on the rolled copper foil 4 of polyimide layer 2 one sides and the electrolytic copper foil 6 that is pressed on polyimide layer 2 another sides.And, be coated with glue-line (not shown) between described polyimide layer 2 and electrolytic copper foil 4, the rolled copper foil 6, modified epoxy or acrylate glue are adopted in being coated with of described glue-line, and bondline thickness can be from 5 μ m to 25 μ, the both sides bondline thickness can be identical, also can asymmetric thickness.The thickness of described rolled copper foil 4 and electrolytic copper foil 6 can be identical, also can be different, and in the present embodiment, rolled copper foil 4 is identical with the thickness of electrolytic copper foil 6.
The manufacture craft of the utility model double side flexible copper coated board comprises the steps:
Step 1: the glue-line that applies suitable thickness is gone up on the surface at polyimides (PI), and this glue-line is dried, and this glue can adopt modified epoxy or acrylate glue;
Step 2: with this polyimides (PI) that is coated with glue-line be laminated with at a certain temperature with electrolytic copper foil, rolling, and carry out the baking of certain hour, stoving time is generally 8～20 hours, baking temperature is 70-90 ℃.
Step 3: the glue-line that on another surface of the polyimides PI of the single sided board that is laminated with electrolytic copper foil, applies suitable thickness once more, and this glue-line dried, the coating of this glue can be adopted modified epoxy or acrylate glue with the coating of glue for the first time in the step 1, and coating thickness is identical;
Step 4: be laminated with at a certain temperature with rolled copper foil, and at high temperature carry out baking-curing, thereby obtain the two-sided double side flexible copper coated board that covers the different Cu foil-type.
Double side flexible copper coated board of the present utility model is three layers of two sides flexibility coat copper plate, two kinds of dissimilar copper foil materials are adopted on two sides in polyimides (PI), one side adopts electrolytic copper foil, its cost is lower, another side adopts rolled copper foil, have good flexural property, when reducing cost, still have good flexural property.
Double side flexible copper coated board of the present utility model has been given full play to the Cost And Performance advantage of rolled copper foil and two kinds of materials of electrolytic copper foil, and this double side flexible copper coated board can ideally solve the two contradiction and make that the product flexural property did not reduce when cost obtained descending.Promptly making two-layer flexibility coat copper plate, one side adopts electrolytic copper foil, and another side adopts rolled copper foil, identifies at copper foil surface, in requiring high flexibility place, the electrolytic copper foil etching off is stayed rolled copper foil, just can use as two-sided calendering copper-clad plate.Simultaneously, in the production process of double side flexible copper coated board, because electrolytic copper foil is more easy to process than calendering Copper Foil good rigidly, because of its qualification rate height than pure rolled copper foil plate.
Below with regard to manufacture craft of the present utility model, and compare with the performance and the cost of existing double side flexible copper coated board, details are as follows:
Embodiment 1
Be coated with the modified epoxy glue-line of 13 μ m above the 12 μ m polyimide films with clock deep pool chemistry earlier, 160 ℃ the baking 4 minutes after, be laminated with under 70 ℃ of temperature with 18 μ electrolytic copper foils of Mitsui metal, after toasting 18 hours about 80 ℃, and then at the glue that on the PI surface, is coated with suitable 13 μ m with this single sided board for the second time, 160 ℃ of bakings 4 minutes, under 80 ℃ of temperature, be laminated with together with Japan solid that moral 18 μ m and rolled copper foil.Under 80-160 ℃, toasted then 1 hour to 20 hours, thereby obtain the two-sided flexibility coat copper plate that covers the different Cu foil-type.
Embodiment 2
Be coated with the modified epoxy glue-line of 13 μ m above the 12 μ m polyimides with clock deep pool chemistry earlier, 160 ℃ the baking 4 minutes after, be laminated with under 70 ℃ of temperature with 35 μ electrolytic copper foils of Mitsui metal, after toasting 18 hours about 80 ℃, and then at the glue that on the PI surface, is coated with suitable 10 μ m with this single sided board for the second time, 160 ℃ of bakings 4 minutes, under 80 ℃ of temperature, be laminated with together with Japan solid that moral 18 μ m and rolled copper foil.Under 80-160 ℃, toasted then 60 minutes to 20 hours, thereby obtain the two-sided two-sided flexibility coat copper plate that covers different Cu foil-type and different bondline thicknesss.
Comparative example 1
Be coated with the modified epoxy glue-line of 13 μ m above the 12 μ m polyimides with clock deep pool chemistry earlier, 160 ℃ the baking 4 minutes after, consolidating your 18 μ rolled copper foils of moral with Japan is laminated with under 70 ℃ of temperature, after toasting 18 hours about 80 ℃, and then at the glue that on the PI surface, is coated with suitable 13 μ m with this single sided board for the second time, 160 ℃ of bakings 4 minutes, consolidate your moral 18 μ m rolled copper foils with Japan and under 80 ℃ of temperature, be laminated with together.Under 80-160 ℃, toast 60 minutes-20 hours then, thereby obtain the two-sided flexibility coat copper plate that covers rolled copper foil.
Comparative example 2
Be coated with the modified epoxy glue-line of 13 μ m above the 12 μ m polyimides with clock deep pool chemistry earlier, 160 ℃ the baking 4 minutes after, be laminated with under 70 ℃ of temperature with 18 μ electrolytic copper foils of Mitsui metal, after toasting 18 hours about 80 ℃, and then at the glue that on the PI surface, is coated with suitable 13 μ m with this single sided board for the second time, 160 ℃ of bakings 4 minutes, under 80 ℃ of temperature, be laminated with together with Mitsui metal 18 μ m electrolytic copper foils.Under 80-160 ℃, toasted then 60 minutes to 20 hours, thereby obtain the two-sided flexibility coat copper plate that covers electrolytic copper foil.
With the flexibility coat copper plate of above making, earlier Copper Foil is simultaneously etched away, double side flexible copper coated board etching electrolytic copper foil face of the present utility model carries out performance relatively then.
Performance compares:
Carry out folding resistance contrast according to Japanese JPCA standard MIT method, the result of the result of embodiment and comparative example 1 is suitable, compared to the result of comparative example 2 significantly raising is arranged.
Cost compares:
By present 41 dollars/Kg of market price rolled copper foil, 12 dollars/Kg of electrolytic copper foil compares, and X is the cost of PI and glue-line.Low 29 dollars of embodiment cost comparative example 1 cost, folding resistance are but suitable with comparison 1.Therefore product of the present utility model has cost performance preferably.
| Item compared | Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 |
| Folding resistance MIT R=0.8mm time | 820 | 750 | 830 | 256 |
| Cost relatively | X+53 | X+65 | X+82 | X+24 |
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model accompanying Claim.
Claims (5)
1, a kind of double side flexible copper coated board is characterized in that, comprising: polyimide layer, the electrolytic copper foil that is pressed on the laminated rolled copper foil of polyimides and is pressed on the polyimide layer another side.
2, double side flexible copper coated board as claimed in claim 1 is characterized in that, is coated with glue-line between described polyimide layer and electrolytic copper foil, the rolled copper foil.
3, double side flexible copper coated board as claimed in claim 2 is characterized in that, modified epoxy or acrylate glue are adopted in being coated with of described glue-line.
4, double side flexible copper coated board as claimed in claim 2 is characterized in that, described bondline thickness is 5-25 μ m, and the double spread layer thickness is a symmetry or asymmetric.
5, double side flexible copper coated board as claimed in claim 1 is characterized in that, described rolled copper foil and electrolytic copper foil thickness are identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820093958XU CN201238419Y (en) | 2008-05-13 | 2008-05-13 | Two-sided flexible copper-covered plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820093958XU CN201238419Y (en) | 2008-05-13 | 2008-05-13 | Two-sided flexible copper-covered plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201238419Y true CN201238419Y (en) | 2009-05-13 |
Family
ID=40651152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820093958XU Expired - Lifetime CN201238419Y (en) | 2008-05-13 | 2008-05-13 | Two-sided flexible copper-covered plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201238419Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472876A (en) * | 2015-12-29 | 2016-04-06 | 广东欧珀移动通信有限公司 | Mobile terminal, flexible printed circuit and manufacturing method therefor |
| WO2021120117A1 (en) * | 2019-12-19 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Substrate plate having different copper foils on two surfaces thereof |
-
2008
- 2008-05-13 CN CNU200820093958XU patent/CN201238419Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472876A (en) * | 2015-12-29 | 2016-04-06 | 广东欧珀移动通信有限公司 | Mobile terminal, flexible printed circuit and manufacturing method therefor |
| WO2021120117A1 (en) * | 2019-12-19 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | Substrate plate having different copper foils on two surfaces thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090513 |
|
| CX01 | Expiry of patent term |