CN112201508A - Light and thin flexible circuit board - Google Patents
Light and thin flexible circuit board Download PDFInfo
- Publication number
- CN112201508A CN112201508A CN202011179033.9A CN202011179033A CN112201508A CN 112201508 A CN112201508 A CN 112201508A CN 202011179033 A CN202011179033 A CN 202011179033A CN 112201508 A CN112201508 A CN 112201508A
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- China
- Prior art keywords
- layer
- waterproof glue
- upper layer
- pet
- circuit board
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
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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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/036—Multilayers with layers of different types
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Push-Button Switches (AREA)
Abstract
The invention discloses a light and thin flexible circuit board which comprises an upper layer of PET, an upper layer of circuit, upper layer of insulating UV, an upper layer of jumper, upper layer of waterproof glue, a middle layer of spacer, lower layer of waterproof glue, a lower layer of jumper, lower layer of insulating UV, a lower layer of circuit and lower layer of PET, wherein the upper layer of PET, the upper layer of circuit, the upper layer of insulating UV; wherein, the thickness of the upper layer PET is 0.05-0.06mm, the thickness of the lower layer PET is 0.05-0.06mm, the thickness of the middle layer spacer is 0.025-0.038mm, and the total thickness of the flexible circuit board is 0.15-0.22 mm; the upper layer waterproof glue covers the upper layer circuit, the upper layer insulation UV and the upper layer jumper wire completely; the lower layer waterproof glue is used for fully covering the lower layer circuit, the lower layer insulation UV and the lower layer jumper; the upper waterproof glue or the lower waterproof glue is printed with a layer of exhaust groove. The light and thin flexible circuit board provided by the invention has the advantages that the flexible circuit board is lighter and thinner, the pressing force is more comfortable, the hand feeling is better, and the light and thin flexible circuit board has an excellent waterproof function and an excellent exhaust function.
Description
Technical Field
The invention relates to the technical field of flexible circuit boards, in particular to a light and thin flexible circuit board.
Background
The flexible circuit board is mainly applied to the field of equipment with functions of household appliance keys, computer keys and various keys, and electric functions are realized by printing conductive silver paste, insulating UV, carbon, waterproof glue and the like on PET.
Generally, the flexible circuit board is divided into three major components, namely an upper layer, a middle layer and a lower layer, wherein the thicknesses of the PET of the upper layer and the lower layer are usually 0.075mm-0.1mm, the thickness of the PET of the middle layer is usually 0.05 mm-0.075 mm, and the total thickness of the product is 0.3-0.35 mm.
In addition, in the prior art, the waterproof glue is locally printed at positions of the lines, the jumper wires and the like, so that the problem of poor waterproof performance exists, and short circuit of the lines is easily caused; moreover, since the exhaust grooves are usually formed in a part of the waterproof adhesive, the exhaust performance is poor, and the touch feeling when the key is pressed is poor.
Disclosure of Invention
In order to solve the technical problem, the invention provides a light and thin flexible circuit board which comprises an upper layer of PET, an upper layer of circuit, an upper layer of insulating UV, an upper layer of jumper wire, upper layer of waterproof glue, a middle layer of spacer, lower layer of waterproof glue, a lower layer of jumper wire, lower layer of insulating UV, a lower layer of circuit and lower layer of PET, wherein the upper layer of PET, the upper layer of circuit, the upper layer of insulating UV, the upper layer of jumper wire, the; the thickness of the upper layer PET is 0.05-0.06mm, the thickness of the lower layer PET is 0.05-0.06mm, the thickness of the middle layer spacer is 0.025-0.038mm, and the total thickness of the flexible circuit board is 0.15-0.22 mm.
According to the light and thin flexible circuit board provided by the invention, the upper layer and the lower layer are designed by using PET with the thickness of 0.05-0.06mm, the middle layer is designed by using PET with the thickness of 0.025-0.038mm, and according to the design process, the total thickness of the product is 0.15-0.22mm, so that the flexible circuit board is lighter and thinner, the pressing force is more comfortable, and the hand feeling is better, and the design process that the upper layer or the lower layer of the flexible circuit board is designed by using PET with the thickness of 0.05-0.06mm, and the middle layer is designed by using PET with the thickness of 0.025-0.038mm is in the protection range of the.
The upper circuit, the upper insulating UV, the upper jumper wire and the upper waterproof glue are sequentially printed on the upper PET, and the upper waterproof glue covers the upper circuit, the upper insulating UV and the upper jumper wire; lower floor's circuit, the insulating UV of lower floor, lower floor's wire jumper and lower floor's waterproof glue are printed in proper order on the PET of lower floor, just lower floor's waterproof glue will lower floor's circuit, the insulating UV of lower floor and lower floor's wire jumper full coverage.
According to the invention, by adopting the mode that the upper layer circuit and the lower layer circuit are completely wrapped by the waterproof glue, the liquid and the moisture can be effectively prevented from contacting the circuit of the flexible circuit board, the liquid and the moisture are prevented from damaging the electrical function of the flexible circuit board, the excellent waterproof function is achieved, and the problem of poor moisture-proof and waterproof performance caused by the arrangement of the waterproof glue on the local parts of the circuit and the like in the conventional mode is effectively solved.
Wherein, an upper layer air exhaust groove is printed on the upper layer waterproof glue; or a lower-layer exhaust channel is printed on the lower-layer waterproof glue; or, the upper waterproof glue is printed with an upper exhaust groove and the lower waterproof glue is printed with a lower exhaust groove.
According to the invention, the mode that the whole layer of exhaust groove is printed on the upper layer of waterproof glue or the lower layer of waterproof glue is adopted to ensure that the exhaust function is normal when the key is pressed, so that the problem of unsmooth exhaust caused by the fact that the exhaust groove is arranged on the part of the waterproof glue in a conventional mode is effectively solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
Fig. 1 is an exploded schematic view of a flexible printed circuit disclosed in embodiment 1 of the present invention.
In the figure: 1. upper PET layer; 2. an upper layer circuit; 3. insulating the upper layer with UV; 4. an upper layer jumper wire; 5. waterproof glue on the upper layer; 6. an upper exhaust channel; 7. a middle layer spacer; 8. lower waterproof glue layer; 9. a lower layer jumper wire; 10. insulating UV of the lower layer; 11. a lower layer circuit; 12. and lower PET layer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1:
referring to fig. 1, the light and thin flexible circuit board provided by the invention comprises an upper PET1, an upper circuit 2, an upper insulating UV3, an upper jumper 4, an upper waterproof glue 5, an upper exhaust groove 6, a middle spacer 7, a lower waterproof glue 8, a lower jumper 9, a lower insulating UV10, a lower circuit 11 and a lower PET12 which are sequentially arranged from top to bottom; wherein, the thickness of the upper layer PET1 is 0.05-0.07mm, the thickness of the lower layer PET12 is 0.05-0.07mm, the thickness of the middle layer spacer 7 is 0.025-0.039mm, and the total thickness of the flexible circuit board is 0.15-0.22 mm.
In the light and thin flexible circuit board provided in this embodiment 1, the upper layer and the lower layer are designed to use PET with a thickness of 0.05-0.07mm, the middle layer is designed to use PET with a thickness of 0.025-0.039mm, and according to the design process, the total thickness of the product is 0.15-0.22mm, so that the flexible circuit board is lighter and thinner, the pressing force is more comfortable, and the hand feeling is better, and all the design processes that the upper layer or the lower layer of the flexible circuit board is designed to use PET with a thickness of 0.05-0.07mm, and the middle layer is designed to use PET with a thickness of 0.025-0.039mm are within the protection scope of.
The upper-layer circuit 2, the upper-layer insulating UV3, the upper-layer jumper wire 4 and the upper-layer waterproof glue 5 are sequentially printed on the upper-layer PET1, and the upper-layer waterproof glue 5 completely covers the upper-layer circuit 2, the upper-layer insulating UV3 and the upper-layer jumper wire 4; lower floor's circuit 11, the insulating UV10 of lower floor, lower floor's wire jumper 9 and lower floor's waterproof glue 8 print in proper order on lower floor's PET12, and lower floor's waterproof glue 8 covers lower floor's circuit 11, the insulating UV10 of lower floor and lower floor's wire jumper 9 is full.
This embodiment 1 is through adopting the mode that upper and lower floor circuit 11 is wrapped up by waterproof glue is whole, can effectively prevent the circuit of liquid and moisture contact flexible line way board, avoids liquid and moisture to destroy flexible line way board's electrical function, reaches good waterproof function.
In the embodiment 1, an upper layer exhaust groove 6 is printed on the upper layer waterproof glue 5, so that the exhaust function is ensured to be normal when the key is pressed.
Example 2:
the difference between the embodiment 2 and the embodiment 1 is that a lower layer air exhaust groove is printed on the lower layer waterproof glue 8.
Example 3:
this example 3 differs from examples 1 and 2 in that an upper layer of air exhaust grooves 6 is printed on the upper layer of waterproof glue 5 and a lower layer of air exhaust grooves is printed on the lower layer of waterproof glue 8.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A light and thin flexible circuit board comprises an upper layer PET (1), an upper layer circuit (2), an upper layer insulation UV (3), an upper layer jumper wire (4), an upper layer waterproof adhesive (5), a middle layer spacer (7), a lower layer waterproof adhesive (8), a lower layer jumper wire (9), a lower layer insulation UV (10), a lower layer circuit (11) and a lower layer PET (12) which are sequentially arranged from top to bottom; the method is characterized in that:
the thickness of the upper layer PET (1) is 0.05-0.06mm, the thickness of the lower layer PET (12) is 0.05-0.06mm, the thickness of the middle layer spacer (7) is 0.025-0.038mm, and the total thickness of the flexible circuit board is 0.15-0.22 mm;
the upper-layer circuit (2), the upper-layer insulating UV (3), the upper-layer jumper (4) and the upper-layer waterproof glue (5) are sequentially printed on the upper-layer PET (1), and the upper-layer waterproof glue (5) completely covers the upper-layer circuit (2), the upper-layer insulating UV (3) and the upper-layer jumper (4);
the lower-layer circuit (11), the lower-layer insulating UV (10), the lower-layer jumper wire (9) and the lower-layer waterproof glue (8) are sequentially printed on the lower-layer PET (12), and the lower-layer waterproof glue (8) completely covers the lower-layer circuit (11), the lower-layer insulating UV (10) and the lower-layer jumper wire (9);
and the upper layer of waterproof glue (5) or the lower layer of waterproof glue (8) is printed with a layer of exhaust groove.
2. The thin and light flexible printed circuit board of claim 1, wherein the upper waterproof glue (5) is printed with an upper exhaust groove (6).
3. The thin and light flexible printed circuit board of claim 1, wherein the lower waterproof glue (8) is printed with a lower air exhaust groove.
4. The thin and light flexible printed circuit board of claim 1, wherein the upper layer of waterproof glue (5) is printed with an upper layer of air exhaust grooves (6) and the lower layer of waterproof glue (8) is printed with a lower layer of air exhaust grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179033.9A CN112201508A (en) | 2020-10-29 | 2020-10-29 | Light and thin flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179033.9A CN112201508A (en) | 2020-10-29 | 2020-10-29 | Light and thin flexible circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112201508A true CN112201508A (en) | 2021-01-08 |
Family
ID=74011900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011179033.9A Pending CN112201508A (en) | 2020-10-29 | 2020-10-29 | Light and thin flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112201508A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347366A (en) * | 2021-12-29 | 2022-04-15 | 无锡市科虹标牌有限公司 | Protection method for injection molding outgoing line position of flexible switch in IMC (in-molded Circuit) |
-
2020
- 2020-10-29 CN CN202011179033.9A patent/CN112201508A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347366A (en) * | 2021-12-29 | 2022-04-15 | 无锡市科虹标牌有限公司 | Protection method for injection molding outgoing line position of flexible switch in IMC (in-molded Circuit) |
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