CN208798262U - A kind of flame retardant type multilayer circuit board - Google Patents
A kind of flame retardant type multilayer circuit board Download PDFInfo
- Publication number
- CN208798262U CN208798262U CN201821219199.7U CN201821219199U CN208798262U CN 208798262 U CN208798262 U CN 208798262U CN 201821219199 U CN201821219199 U CN 201821219199U CN 208798262 U CN208798262 U CN 208798262U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- prepreg
- lower plywood
- upside
- flame retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000003063 flame retardant Substances 0.000 title claims abstract description 28
- 239000011120 plywood Substances 0.000 claims abstract description 26
- 230000009977 dual effect Effects 0.000 claims abstract description 18
- 229920002799 BoPET Polymers 0.000 claims abstract description 12
- 239000010425 asbestos Substances 0.000 claims abstract description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Production Of Multi-Layered Print Wiring Board (AREA)
Abstract
A kind of flame retardant type multilayer circuit board provided by the utility model, including circuit board, the circuit board includes lower plywood, the first prepreg on the upside of the lower plywood, dual platen on the upside of first prepreg, the second prepreg on the upside of the dual platen, top plate on the upside of second prepreg, and run through the lower plywood, first prepreg, dual platen, second prepreg, multiple via holes of top plate, the lower plywood lower surface is covered with one layer of Flame-retardant PET film, asbestos layer is equipped in first prepreg, the via hole inner wall posts one layer of heat expansion elevated-temperature seal item, the heat expansion elevated-temperature seal item is close to the lower plywood side setting.The multilayer circuit board that the utility model mentions occurs the rate of decay that can slow down circuit board when fire, has preferable flame retardant property.
Description
Technical field
The utility model relates to circuit board technology fields, and in particular to a kind of flame retardant type multilayer circuit board.
Background technique
Circuit board is the supplier of electronic component electrical connection.The history of its existing more than 100 years of development；Its design
Mainly layout design；Major advantage using circuit board is to greatly reduce the mistake of wiring and assembly, improves Automated water
Gentle productive labor rate.Circuit board develops to dual platen, multi-layer board, further circuits plate manufacturing technology development trend from single layer
It is in performance to high density, high-precision, fine pore, thin wire, small spacing, highly reliable, multiple stratification, high-speed transfer, light weight, thin
Type direction is developed.
Circuit board is typically mounted at electronic equipment internal, and when fire occurs for general device, the intensity of a fire is spread from the bottom up, equipment
Shell is first ignited, and is then reburned and is ruined circuit board, and traditional circuit board has no flame retarding function, and flame is quickly by the route of circuit board
And electronic component is burnt.For multilayer circuit board, since main line is located between two layers of semi-solid preparation layer, when fire occurs,
Flame is easy to enter inside by the via hole on circuit board, so that main line be burnt.And the presence of via hole also results in air
Circulation, accelerates fire spreading.
Utility model content
In view of the above problems, the utility model provides a kind of flame retardant type multilayer circuit board, occur that electricity can be slowed down when fire
The rate of decay of road plate has preferable flame retardant property.
To achieve the above object, the utility model solves by the following technical programs:
A kind of flame retardant type multilayer circuit board, including circuit board, the circuit board include lower plywood, are located on the lower plywood
First prepreg of side, the dual platen on the upside of first prepreg, the second half on the upside of the dual platen
Cured plate, the top plate on the upside of second prepreg and through the lower plywood, the first prepreg, two-sided
Plate, the second prepreg, top plate multiple via holes, the lower plywood lower surface is covered with one layer of Flame-retardant PET film, described first
Asbestos layer is equipped in prepreg, the via hole inner wall posts one layer of heat expansion elevated-temperature seal item, and the heat expansion is high
Warm sealing strip is close to the lower plywood side setting.
Specifically, the lower plywood lower end is fixed with multiple pads, the pad bottom passes through the Flame-retardant PET film.
Specifically, the dual platen upper and lower surface is equipped with several conducting wires.
Specifically, the top plate upper end is equipped with several electronic components.
Specifically, the Flame-retardant PET film with a thickness of 3-5mm.
Specifically, heat expansion elevated-temperature seal item (61) is sponge body rubber.
The beneficial effects of the utility model are:
The multilayer circuit board of the utility model is covered with one layer of Flame-retardant PET film in lower plywood lower surface, in the first semi-solid preparation
It is equipped with asbestos layer in plate, by increasing multi-layer fire-retarded protection structure, is capable of the internal wiring of protection circuit plate well, and in mistake
Hole inner wall posts one layer of heat expansion elevated-temperature seal item, and heat expansion elevated-temperature seal item is close to the lower plywood side setting,
When fire spreading arrived hole site, heat expands the heat absorption expansion of elevated-temperature seal item, to block via hole, prevents flame from mistake
Enter inside circuit board in hole, while avoiding circuit board upper and lower ends air circulation, reduces fire spreading speed.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of flame retardant type multilayer circuit board of the utility model.
Appended drawing reference are as follows: lower plywood 1, pad 11, the first prepreg 2, dual platen 3, conducting wire 31, the second semi-solid preparation
Plate 4, top plate 5, electronic component 51, via hole 6, heat expand elevated-temperature seal item 61, Flame-retardant PET film 7, asbestos layer 8.
Specific embodiment
The utility model is described in further detail below with reference to embodiment and attached drawing, but the implementation of the utility model
Mode is without being limited thereto.
As shown in Figure 1:
A kind of flame retardant type multilayer circuit board, including circuit board, circuit board include lower plywood 1, positioned at the of the upside of lower plywood 1
One prepreg 2, the dual platen 3 positioned at 2 upside of the first prepreg, the second prepreg 4 positioned at 3 upside of dual platen, position
In the top plate 5 of 4 upside of the second prepreg and through lower plywood 1, the first prepreg 2, dual platen 3, the second semi-solid preparation
Multiple via holes 6 of plate 4, top plate 5,1 lower surface of lower plywood are covered with one layer of Flame-retardant PET film 7, are equipped in the first prepreg 2
Asbestos layer 8,6 inner wall of via hole post one layer of heat expansion elevated-temperature seal item 61, and heat expansion elevated-temperature seal item 61 is close to lower layer
1 side of plate setting, when fire spreading arrive 6 position of via hole when, heat expand elevated-temperature seal item 61 heat absorption expands, to block mistake
Hole 6 prevents flame from entering inside circuit board from via hole 6, while avoiding circuit board upper and lower ends air circulation, reduces fire
Gesture rate of propagation.
Preferably, 1 lower end of lower plywood is fixed with multiple pads 11, and 11 bottom of pad passes through Flame-retardant PET film 7, and pad 11 is used
It is welded in conducting wire etc..
Preferably, 3 upper and lower surface of dual platen is equipped with several conducting wires 31, conducting wire 31 be used for by lower plywood 1 with
Dual platen 3, top plate 5 are electrically connected with dual platen 3.
Preferably, 5 upper end of top plate is equipped with the electronic components 51 such as several capacitors, resistance.
Preferably, better protecting effect in order to obtain, setting Flame-retardant PET film 7 with a thickness of 3-5mm.
Preferably, heat expansion elevated-temperature seal item 61 is sponge body rubber, and sponge body rubber is heat absorption intumescent filler material, is met
Heat can expand, and expansion multiplying power is high.
A kind of embodiment of the utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. a kind of flame retardant type multilayer circuit board, including circuit board, which is characterized in that the circuit board includes lower plywood (1), is located at
The first prepreg (2) on the upside of the lower plywood (1), the dual platen (3) on the upside of first prepreg (2), position
The second prepreg (4) on the upside of the dual platen (3), the top plate (5) being located on the upside of second prepreg (4),
And through the lower plywood (1), the first prepreg (2), dual platen (3), the second prepreg (4), top plate (5) it is more
A via hole (6), lower plywood (1) lower surface are covered with one layer of Flame-retardant PET film (7), are equipped in first prepreg (2)
Asbestos layer (8), via hole (6) inner wall post one layer of heat expansion elevated-temperature seal item (61), and the heat expansion high temperature is close
Strip of paper used for sealing (61) is close to the setting of the lower plywood (1) side.
2. a kind of flame retardant type multilayer circuit board according to claim 1, which is characterized in that lower plywood (1) lower end is solid
Surely have multiple pads (11), pad (11) bottom passes through the Flame-retardant PET film (7).
3. a kind of flame retardant type multilayer circuit board according to claim 1, which is characterized in that following table on the dual platen (3)
Face is equipped with several conducting wires (31).
4. a kind of flame retardant type multilayer circuit board according to claim 1, which is characterized in that top plate (5) upper end is set
There are several electronic components (51).
5. a kind of flame retardant type multilayer circuit board according to claim 1, which is characterized in that the thickness of the Flame-retardant PET film (7)
Degree is 3-5mm.
6. a kind of flame retardant type multilayer circuit board according to claim 1, which is characterized in that the heat expands elevated-temperature seal
Item (61) is sponge body rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821219199.7U CN208798262U (en) | 2018-07-31 | 2018-07-31 | A kind of flame retardant type multilayer circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821219199.7U CN208798262U (en) | 2018-07-31 | 2018-07-31 | A kind of flame retardant type multilayer circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208798262U true CN208798262U (en) | 2019-04-26 |
Family
ID=66203910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821219199.7U Expired - Fee Related CN208798262U (en) | 2018-07-31 | 2018-07-31 | A kind of flame retardant type multilayer circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208798262U (en) |
-
2018
- 2018-07-31 CN CN201821219199.7U patent/CN208798262U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |