Rigid PCB board is a conventional Printed Circuit Board. It cannot be bent or flexed.
A Rigid PCB board is one of the important components of electronics product manufacture. Almost every electronic product must be used PCB board, from small watches, and calculators to computers, electronic communication equipment, and even military weapon systems.
Single sided flex PCB the simplest Flex board, it has only one copper layer. It is usually processed on the basis of two raw materials: “base material, glue and copper foil” and “coverlay and glue”. The base material used by flexible printed circuit is generally polyimide (PI), but not limited to, it can also be polyethylene terephthalate, aramid fiber ester and polyvinyl chloride.
2 Layer flexible printed circuit contains top and bottom sides copper, it’s increased the wiring density per unit area. Generally, when the wiring of the circuit is more complicated, and the single sided flex PCB cannot meet the wiring requirements, the 2 Layer flexible circuit board will be selected. Compared with single sided Flex PCB, the biggest difference between 2 Layer flexible circuit board is added vias structure to connect two layers of copper foil (that is, two layers of conductive patterns) to form a conductive path.
4 Layer flexible printed circuit is to press single sided and 2 Layer flex PCB together, metallized through holes and electroplating, and form conductive paths between different layers. In this way, no complicated welding process is required. Compared with single side flex PCB and 2 Layer flexible circuit board, 4 Layer flexible PCB has higher reliability, better thermal conductivity, and more convenient assembly. But it loses the excellent flexibility of single and 2 Layer flexible circuit board. However, there is also a compromise option, that is 4 layer Flex PCB.
Flexible printed circuit boards can be bent, wound and folded freely. Also it can be arranged arbitrarily according to the requirements of space layout, and can be moved and stretched in three-dimensional space arbitrarily, so as to achieve the integration of component assembly and wire connection
The use of flexible printed circuit can greatly reduce the volume and weight of electronic products. Suitable for the development of electronic products in the direction of high density, miniaturization and high reliability.
Flexible printed circuit also has good heat dissipation and solderability and is easy to assemble, low overall cost advantages. The design of the combination of FPC PCB and rigid PCB also makes up for the slight deficiency of the flexible substrate in the load-bearing capacity of the components to a certain extent.
| Item | Technische parameters | Specificatie |
| Min. Flex PCB PCB-lijnbreedte/-ruimte | 2/3 mil | Afgewerkte koperdikte H oz |
| Min Flex PCB-padring van Via | 3 miljoen | Afstand tussen de rand van het gat en de buitenrand van de ring |
| Min Flex PCB Padring van PTH | 5 miljoen | Afstand tussen de rand van het gat en de buitenrand van de ring |
| Min Flex PCB via grootte | 4 mil | |
| Min Flex PCB-dikte van dubbelzijdig | 0,1 mm | Dikte van de uiteindelijke plaat |
| Min Flex PCB-dikte van meerlaags | 0,2 mm | Dikte van de uiteindelijke plaat |
| Maximale flexibele PCB-dikte | 0,35 mm | Dikte van de uiteindelijke plaat |
| Maximale Flex PCB-afmeting | 260×620mm | Enkel- en dubbelzijdige printplaat |
| Ruimte tussen lijn en bordrand | 8 mil | Frezen van omtrek |
| Max Flex PCB-lagen | 8 lagen | |
| Flex PCB-soldeermaskerkleur | Geel, zwart, wit | |
| Flex PCB zeefdruk kleur | Wit Zwart | |
| FPC PCB-oppervlakteafwerking | ENIG, ENEPIG, ImAg, ImTin, OSP, vergulden | |
| Maximale afwerking koperdikte | 3 ons | |
| Diëlektrische dikte | 2,5 miljoen | |
| Flex PCB-materiaal | ShenYi standaard polyimide, halogeenvrij polyimide, lijm en versteviger | |
| Flex-verstevigingsmateriaal | FR4 Versteviger, Polyimide Versteviging, Stalen Versteviging |
De drie elementen van flexibel PCB-materiaal: koperfolie, lijm, polyimide en polyester.
Copper foil can generally be divided into electrolytic copper foil and rolled copper foil. Electrolytic copper is formed by separating copper ions in copper sulfate solution by electric current, and then it is completed after anti-oxidation and roughening treatment. Its characteristic is strong electrical conductivity, but relatively weak bending resistance. Rolled copper foil is made by rolling the copper plate repeatedly, and its crystallization is a lamellar structure. It has good flexibility.
ADH is an adhesive, which is the most important part in the manufacturing process of flexible copper clad laminates. Many important performance indicators in the board are determined by the performance of the glue. For example: peel strength between dielectric substrate and metal foil, flexural resistance, chemical properties, moisture resistance, adhesive layer flow properties, etc.The adhesive used in flexible copper clad laminates must be able to withstand various process conditions and the erosion of chemicals used in the manufacture of flex printed circuit boards, without delamination or degradation.
Polyimide&Polyester contains PI base Flexible Printed Circuitmaterial, PI coverlay, PI stiffener material PI base material: Flexible PCB printed circuit board materials are divided into two types: those with glue and those without glue. Whether it is a material with glue or without glue, Polyimide is a must indispensable.PI coverlay: Its main function is for circuit insulation.PI stiffener material: It is often used in the area on the back of the whole finger of FPC PCB, and the PI ribs are used to increase the complexity and hardness of the fingers, making it easy to insert and remove.
Mobile electronic devices such as smartphones and tablets, There are flexible printed circuit in the camera module, capacitive screen connection part, button part, optical drive induction head, receiving antenna and other parts of the PC.
Flexible Printed Circuits are widely used in high-tech electronic fields such as communications, computers, instruments, automobiles, medical care, industrial control, home appliances and CNC machine tools, camera modules, and intelligent battery management modules.
Mobile electronic devices such as smartphones and tablets, There are flexible printed circuit in the camera module, capacitive screen connection part, button part, optical drive induction head, receiving antenna and other parts of the PC.
Driven by emerging markets such as 5G and wearable devices, Flexible printed circuit will also use in new growth space.
Flexible printed circuit widely use in Camcorder, CDRW cubic element patch,CD RW drive parts,PDP, Camera Module, Laser Printer Head drive parts, Mobile phone electromagnetic wave shielding.
The flexible printed circuit board material is generally a roll of 250mm wide 50M or 100M long PI base material covered with a certain thickness of copper on one or both sides of the copper foil. Therefore, we need to cut the large roll into a work board according to the size of the manufacturer’s instructions.
Boren is de tweede stop in het productieproces van flexibele printplaten, en de kwaliteit van het boren houdt rechtstreeks verband met de functie en nauwkeurigheid van het product.
Along with the continuous development of high-density flexible PCB, Traditional mechanical drilling technology can no longer meet the market demand for small hole diameter, high precision and high efficiency. Laser drilling has become the mainstream processing technology for flexible PCB microvias.
VCP electroplating line using Faraday’s theorem (the thickness of the coating is proportional to the current density and plating time) to plat the hole wall of the flexible printed circuit board to copper thickness following IPC standard or required by customer.
Composed of PE, photoresist and PET, paste dry film on the flexible printed circuit board, so as to achieve the function of image transfer, and protect the circuit during the etching process.
Afhankelijk van de filmbelichting die overeenkomt met de werkzaamheden, wordt het beeld van de flexibele grafische film met gedrukte schakeling overgebracht naar de droge film (voltooid in de stofvrije werkplaats met 10.000 niveaus) en is de belangrijkste uitrusting een automatische belichtingsmachine.
The part of the dry film that is not exposed to light will be washed off by NaCO3, and the dry film on the trace and copper will not be washed off. Useful wiring and copper of flexible printed circuit board are preserved
Flexibel etsen van printplaten is het proces waarbij ongewenst koper van een printplaat wordt verwijderd.
Etching has acid etching process (ferric chloride and copper chloride) and alkaline etching process (ammonia). The acid method is used to etch the inner layers of flexible printed circuit board, it is accurate and cheap but time consuming. The alkaline method is used to etch the outer layer of the flexible PCB, which is fast and expensive.
Flexible printed circuit board dry film stripping removes the protective dry film layer on the FPC circuit board through a chemical reaction. This process is usually done using chemical solutions, which can decompose the chemical substances in the film layer and expose the flex printed circuit board.
De apparatuur voor het verwijderen van ontwikkel- en etsfilms is een horizontale DES-lijn.
Flexible printed circuit board coverlay film, generally also called protective film, protects the circuit from oxidation and covers it for subsequent surface treatment. If the area that does not need gold plating is covered with coverlay. In the subsequent SMT soldering, the role of prevent welding.
Door middel van persen bij hoge temperatuur en hoge druk, gevolgd door bakken bij hoge temperaturen, wordt de thermohardende lijm tussen de afdekfilm en de plaat uitgehard om het doel van de twee nauw verbonden te bereiken. De uithardingsparameters zijn temperatuur 150 ° C, 1 uur. De belangrijkste uitrusting bestaat uit snelle persen en ovens;
Flexibele oppervlaktebehandeling van printplaten wordt voornamelijk gedaan door middel van immersiegoud of ENEPIG. Volgens de eisen van de klant worden metalen zoals nikkel en goud op de blootliggende pads van flexibele PCB's afgezet door chemische of galvanische principes te gebruiken om de pads te beschermen en hun soldeerbaarheid te behouden. De belangrijkste uitrusting is vergulde lijn en vergulde lijn.
Check whether there are open and short circuits between different networks of the flexible printed circuit board, four-wire failure, etc. through test fixtures or equipment. The main equipment is an electric test machine and a flying probe test machine;
Het doel van het verlijmen van Flex PCB-verstijvers is om de mechanische sterkte van de flexibele printplaat te versterken en de montage van onderdelen op het oppervlak van de PCB te vergemakkelijken.
FPC-verstijvingsmaterialen zijn gewone polyimide-verstijvers, FR4-verstijvers en stalen verstijvers.
FR4 stiffener main components are glass fiber cloth and epoxy resin glue, which is the same as the FR4 material used in PCB.
Steel stiffener is made of steel, which has strong hardness and support strength. Manual assembly is required, the process is more complicated, and the cost will be higher.
PI stiffener is as same as the coverlay film, consisting of PI and adhesive release paper, but the PI layer is thicker, can be processed and produced from 0.05mm to 0.25mm, the tolerance can be controlled at +/- 0.03mm, and the precision is high , high temperature resistance (100°C-280°C).
Print the text ink on the flexible printed circuit board through the principle of screen printing, mainly printing the product model, production date code, and various component identifications required by customers, etc. The main equipment includes screen printing machines, ovens, text inkjet printers, etc.;
Flexible printed circuit board punching is a link in the FPC process, which is equivalent to a cutting workstation. At present, the main equipment used in this workstation on the market is flex circuit punching machine and FPC UV laser cutting machine.
Het principe van de flexibele PCB-ponsmachine is om druk door de cilinder uit te oefenen om de mesvorm in de drager te duwen en het flexcircuit in één keer te snijden.
Het principe van de flexibele lasersnijmachine voor printplaten is om het oppervlak van de FPC te bestralen met een laserstraal met hoge energie en hoge dichtheid en deze heen en weer te scannen door de trillende spiegel om een snijdende laag glasmateriaal te vormen.
Door middel van handmatige visuele inspectie, CCD, apparatuur om het uiterlijk en de toestand van het oppervlak van de flexibele printplaat volledig te inspecteren, goede producten van defecte producten te scheiden en betrouwbaarheidstests op het product uit te voeren om te bevestigen of het aan de eisen van de klant voldoet.
Packaging and shipping flex circuits are carried out according to customer requirements. The main packaging methods include vacuum packaging, micro-membrane packaging, tray packaging, etc.
King Sun is a Flex PCB manufacturer with high quality and advanced flexible PCB. We make flex PCB prototype with quick turn lead time, below is our quick turn flex circuits list:
| Aantal lagen | Standaard doorlooptijd | Snel omdraaien |
| 1-2 laag | 4-5 DAG | 24 uur |
| 4 lagen | 5-6 DAG | 48 uur |
| 6 lagen | 7-8 DAG | 96 uur |
| 8 lagen | 9-10 DAG | 140 uur |
We maken zeer complexe en speciale flexibele gedrukte schakelingen, zoals hieronder:
