CN207579249U - A kind of FR4 single-side coated copper plates for improving white edge angle - Google Patents
A kind of FR4 single-side coated copper plates for improving white edge angle Download PDFInfo
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- CN207579249U CN207579249U CN201721679563.3U CN201721679563U CN207579249U CN 207579249 U CN207579249 U CN 207579249U CN 201721679563 U CN201721679563 U CN 201721679563U CN 207579249 U CN207579249 U CN 207579249U
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Abstract
The utility model is related to a kind of FR4 single-side coated copper plates for improving white edge angle, the copper-clad plate includes copper foil and layer of prepreg successively from top to bottom, if layer of prepreg is laminated by the dipped glass fibre cloth of dried layer, at least one layer of dipped glass fibre cloth has undersized contact surface in two adjacent dipped glass fibre cloths, so as to which the undersized contact surface receives the resin overflowed due to compacting under laminated state；Or glass fabric is half undersized glass fabric, upper half storey in the half undersized glass fabric is rich glue-line, lower half storey is undersized layer, adjacent two halves undersized glass fabric is contacted with undersized layer and rich glue-line, so as to which the resin portion in glue-line rich under laminated state is overflowed into the undersized layer of adjacent contact.The application, by changing the structure of dipped glass fibre cloth in semi-solid preparation layer, designs rich glue-line and undersized layer, receives the solidification glue overflowed in rich glue-line by undersized layer, so as to improve the gummosis in lamination process, improve copper-clad plate white edge angle in structure.
Description
Technical field
The utility model is related to single-side coated copper plate structure more particularly to a kind of FR4 single sides that can significantly improve white edge angle
Row's harden structure of copper-clad plate.
Background technology
FR4 copper-clad plates are the abbreviations of glass-epoxy copper-clad plate.The manufacture of PCB product is not only to substrate (CCL)
The requirement of performance is higher and higher, and the requirement to exterior substrate quality is also higher and higher.Many PCB producers are in order to cost-effective, no
The utilization rate of substrate is improved disconnectedly, this just proposes higher requirement to substrate surface appearance (mainly white edge, white angular defect).
For being manufactured especially for single side FR-4 copper-clad plates, sheet metal thickness is thicker, and easier generation white edge, white angle are bad, serious shadow
Ring product quality and shipment rate.
White edge, white angular defect are mainly caused by gummosis is excessive in lamination process, therefore it is to change to control lamination gummosis
The key of kind white edge angle problem.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of FR4 single-side coated copper plates knot for the above-mentioned prior art
Structure can be effectively improved the lamination gummosis of FR4 single-side coated copper plates, improve white edge angle phenomenon.
The technical scheme in the invention for solving the above technical problem is：A kind of FR4 single sides for improving white edge angle cover copper
Plate, which includes copper foil and layer of prepreg successively from top to bottom, if the layer of prepreg is the glass fibers by dried layer
Wei Bu is laminated, and the glass fabric is dipped glass fibre cloth, at least one layer of in two adjacent dipped glass fibre cloths
Dipped glass fibre cloth has undersized contact surface, so as to which the undersized contact surface receives the tree overflowed due to compacting under laminated state
Fat；Or the glass fabric is half undersized glass fabric, the upper half storey in the half undersized glass fabric be rich glue-line,
Lower half storey is undersized layer, and adjacent two halves undersized glass fabric is contacted with undersized layer and rich glue-line, so as to rich under laminated state
Resin portion in glue-line is overflowed into the undersized layer of adjacent contact.
Specifically, the half undersized glass fabric by rich glue glass fabric and undersized glass fabric fitting and
Into the glue content of rich glue glass fabric is more than undersized glass fabric.
Preferably, it is 220g/m that the glass fabric, which is selected from cloth base weight,2Glass fabric.
The single-side coated copper plate structure of the application design, can improve the gummosis in lamination process, on the one hand pass through
Change the structure of dipped glass fibre cloth in semi-solid preparation layer, design rich glue-line and undersized layer, received in rich glue-line by undersized layer
The solidification glue of spilling so as to improve the gummosis in lamination process, improves copper-clad plate white edge angle.
On the other hand, the application is increased by the additive amount (solid part) of inorganic filler during FR-4 glues are formulated from 3%
To 9%；It uses big 7630 (cloth base weight 220g/m2) substitution 7628M (the cloth base weight 210g/m2) glass cloth of cloth base weight instead, is ensureing
In the case of identical dielectric thickness, the resin content of adhesive plaster can be reduced to from 44% (7628M prepregs substance 375g/m2)
42% (7630 adhesive plaster substance 380g/m2).The increase of inorganic filler amount and the reduction of resin content necessarily lead to prepreg stream
The reduction of dynamic property can effectively reduce gummosis during plank pressing, bad so as to improve white edge angle.
Description of the drawings
Fig. 1 is the structure diagram of single-side coated copper plate in the utility model embodiment；
Fig. 2 is the structure diagram of neighbouring two glass fabric in the utility model embodiment 1；
Fig. 3 is the structure diagram of half undersized glass fabric in the utility model embodiment 2.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing embodiment.
Embodiment 1
A kind of FR4 single-side coated copper plates for improving white edge angle, the copper-clad plate include copper foil 1 and prepreg successively from top to bottom
2, layer of prepreg is laminated by eight layers of glass fabric 2, and glass fabric is dipped glass fibre cloth, neighbouring two
Upper strata dipped glass fibre cloth in dipped glass fibre cloth has undersized contact surface 203, the undersized contact surface and adjacent leaching
Glue glass fabric contacts, so as to which the undersized contact surface receives the resin overflowed due to compacting under laminated state.
The glass fabric selected in the present embodiment 7630 (the cloth base weight 220g/ms big for cloth base weight2).The resin of use
Glue formula is shown in Table 1, and as a comparison with the glue formula (being shown in Table 2) before improvement, the performance of final gained copper-clad plate is shown in Table 3.
Table 1
| Title material | Amount of solid (%) | Ingredient proportion (%) |
| Low brominated epoxy | 80 | 77.14 |
| Dicyandiamide | 100 | 1.66 |
| Inorganic filler | 100 | 6.26 |
| 2-methylimidazole | 100 | 0.0512 |
| DMF solvent | 0 | 14.90 |
Table 2
Table 3
Performance comparison no significant difference before and after improvement can meet customer performance requirements, and the white edge of new copper-clad plate
Angle problem has obtained good improvement.
Embodiment 2
A kind of FR4 single-side coated copper plates for improving white edge angle, the copper-clad plate include copper foil 1 and prepreg successively from top to bottom
2, layer of prepreg is laminated by eight layers of glass fabric 2, and glass fabric is dipped glass fibre cloth, glass fabric
For half undersized glass fabric, the upper half storey in the half undersized glass fabric is rich glue-line 201, lower half storey is undersized layer 202,
Adjacent two halves undersized glass fabric is contacted with undersized layer 202 and rich glue-line 201, so as to the tree in glue-line rich under laminated state
Fat part is overflowed into the undersized layer 202 of adjacent contact.
Above-mentioned half undersized glass fabric is bonded by rich glue glass fabric and undersized glass fabric, rich glue glass
The glue content of fiber cloth is more than undersized glass fabric.
Resin adhesive liquid formula used in the present embodiment is shown in Table 1 ingredient with embodiment 1.
In addition to the implementation, the utility model has further included other embodiment, all to use equivalents or equivalent
The technical solution that alternative is formed, should all fall within the protection domain of the utility model claims.
Claims (3)
1. a kind of FR4 single-side coated copper plates for improving white edge angle, it is characterised in that：The copper-clad plate from top to bottom successively include copper foil and
Layer of prepreg, if the layer of prepreg is laminated by the glass fabric of dried layer, the glass fabric is impregnation
Glass fabric, at least one layer of dipped glass fibre cloth has undersized contact surface in two adjacent dipped glass fibre cloths, so as to
The undersized contact surface receives the resin overflowed due to compacting under laminated state；Or the glass fabric is half undersized glass
Fiber cloth, the upper half storey in the half undersized glass fabric is rich glue-line, lower half storey is undersized layer, adjacent two halves undersized glass fibers
Wei Bu is contacted with undersized layer and rich glue-line, so as to which the resin portion in glue-line rich under laminated state overflows into the undersized of adjacent contact
In layer.
2. the FR4 single-side coated copper plates according to claim 1 for improving white edge angle, it is characterised in that：The half undersized glass
Glass fiber cloth is bonded by rich glue glass fabric and undersized glass fabric, and the glue content of rich glue glass fabric, which is more than, owes
Glue glass fabric.
3. the FR4 single-side coated copper plates according to claim 1 for improving white edge angle, it is characterised in that：The glass fabric
It is 220g/m selected from cloth base weight2Glass fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721679563.3U CN207579249U (en) | 2017-12-05 | 2017-12-05 | A kind of FR4 single-side coated copper plates for improving white edge angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721679563.3U CN207579249U (en) | 2017-12-05 | 2017-12-05 | A kind of FR4 single-side coated copper plates for improving white edge angle |
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| CN207579249U true CN207579249U (en) | 2018-07-06 |
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| CN201721679563.3U Active CN207579249U (en) | 2017-12-05 | 2017-12-05 | A kind of FR4 single-side coated copper plates for improving white edge angle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909488A (en) * | 2020-06-30 | 2020-11-10 | 广东裕丰威禾新材料科技股份有限公司 | Thermosetting resin composition, thermosetting laminated board and preparation method |
-
2017
- 2017-12-05 CN CN201721679563.3U patent/CN207579249U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909488A (en) * | 2020-06-30 | 2020-11-10 | 广东裕丰威禾新材料科技股份有限公司 | Thermosetting resin composition, thermosetting laminated board and preparation method |
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