Brief introduction
Flexible circuit board is a highly reliable, excellent flexible printed circuit board which is made of polyimide or polyester film. Called soft board or FPC, with a high wiring density, light weight, thin features.
The FPC is mainly used in mobile phones, laptops, PDA, digital cameras, LCM, and many other products.
Prenatal treatment
Make a fine texture of the FPC board must have a complete and reasonable production process, from pre-pre-production to final delivery, every program must be rigorous execution. In the production process, in order to prevent short-circuit and scrap caused by drilling, rolling, cutting and other problems, and assess how the selection is most suitable for reach customers, prenatal pretreatment is particularly important.
Prenatal pretreatment, three aspects need to be addressed, these three aspects are done by engineers. The first is the FPC board engineering assessments, primarily to assess whether the FPC board could be produced or not, if the company's production capacity could meet customer's requirements or not. If the engineering assessment through, then you need to immediately preparation to meet the various production processes the supply of raw materials. Finally, deal with customer's CAD chart, gerber line materials and other project files to produce specifications for the production environment and production equipment, and then the production drawings and MI (engineering processes card), etc. delegated to Production departments and document control, purchasing, etc., into the conventional production processes.
Production Process
Double side board:
Is expected to open → drilling → PTH → plating → Pre-treatment → paste dry → to bits → exposure → development → → stripping pattern plating pretreatment → → → paste dry alignment exposure → development → etching → Tuomo → surface treatment → affixed cover film suppress → curing → ENIG → printed characters → shear → measuring → punching → final inspection → packaging → shipping
Single panel system
Drilling is expected to open → → → paste dry alignment → exposure → development → etching → Tuomo → surface treatment → paste cover film suppress → curing → surface treatment → ENIG → printed characters → shear → measuring → punch cut → final inspection → packaging → shipping
Production Process
Surface treatment: Immersion Gold, oxidation, zinc, tin spray
Shape processing: hand shape, CNC (CNC machine tools) cutting, laser cutting
Copper thickness: 1/3 oz, 1/2 oz, 1 oz, 2 oz, 4 oz
Detector
According to the widely applcation of the flexible circuit board and the features of material, in order to more effectively save volume and up to a certain precision, characteristic three-dimensional and thin thickness better applied to digital products, mobile phones and laptop computers. Flexible circuit board (FPC) to detect the use of instruments for the optical image measuring instrument.
Features:
1. Rapid: fast assembling processes
All lines are configured. Eliminating unnecessary drain line connection work
2. Small: small volume PCB
Can effectively reduce the volume of the products. Increase the convenience of carrying on
3. light: light weight ratio of PCB (hardboard)
You can reduce the weight of the final product
4. thin: thickness thinner than PCB
Can improve softness strengthen as three-dimensional assembly within limited space
Application
mobile phone
Focus on weight and thin thickness of the flexible circuit board light can effectively save the product volume, easily connect the battery, microphone, with buttons made one.
Computer and the LCD screen
Use one line configuration of the flexible circuit board, and a thin thickness. The digital signal converted into the picture, through the liquid crystal screen presents
CD Walkman
Focusing on three-dimensional characteristics of the flexible circuit board assembly with a thin thickness. The large CD into carry-on companion
Drives
Whether hard drive or floppy disk, are very dependent on high softness FPC and the ultra-thin thickness of 0.1mm, complete fast read data. Whether PC or NOTEBOOK.
New Uses
Components of a hard disk drive (HDD, hard disk drive) suspension circuit (Su printed ensi.n cireuit) and xe packaging board, etc.
Wireless charging coil array, the electromagnetic concentrated in a certain region, to reduce the space consumption is passed, thereby improving power conversion efficiency.
Basic structure
Copper Film
Copper: basically divided in two copper and rolled copper thickness of common 1oz 1 / 2oz and 1/3 oz.
The substrate film: a common thickness 1mil and 1 / 2mil two kinds.
Glue (adhesive): Thickness determined according to customer requirements.
Covering membrane protective film (Cover Film)
Covering membrane protective film: surface insulation thickness 1mil common and 1 / 2mil..
Glue (adhesive): Thickness determined according to customer requirements.
Release paper: Avoid adhesive buildup before pressing foreign body; easy job.
Reinforcing plate (PI Stiffener Film)
Reinforcement plate: reinforcing FPC mechanical strength, easy surface-mounting operation common thickness 3mil to 9mil..
Glue (adhesive): Thickness determined according to customer requirements.
Release paper: Avoid adhesive buildup before pressing foreign body.
EMI: electromagnetic shielding film, within the protective circuit board from the outside world (strong electromagnetic region or area susceptible to interference) interference.
Pros and cons
Advantages of multi-layer circuit board: high packing density, small size, light weight, high density mounting because of reduced wiring, components (including spare parts) between, thereby increasing the reliability; increase the wiring layer, and then increase the design flexibility; impedance can be configured circuit can be formed with a certain speed transmission circuit, it can set the circuit, electromagnetic shielding layer, metal core can be installed to meet the special needs of thermal insulation, and other functions; easy installation, high reliability.
Shenzhen multilayer pcb board shortcomings (failure): the high cost, long cycle; test methods that require high reliability. Multilayer printed circuit is a product of electronic technology, multi-functional, high-speed, large-capacity small size direction. With the development of electronic technology, especially large-scale and widespread application of VLSI, high circuit density multilayer printed fast, high-precision, high number of fine lines change direction.
Flex circuit manufacturer Flex flat cable Manufacturers FLEXIBLE CABLE CNQ1956 PIONEER
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