To "fine line" the shearing section.at fine circuit challenge ~ ~ FPC is now entering a new stage
Units of micro fine lines, fine lines
Mobile phone in the 1990 s for explosive popularity and market expanding, this greatly promote the adoption of FPC.In this context, puts forward the new demand of FPC must respond to market - "fine line".In short, fine lines, high density circuit.Fine lines to more L/S (Line and Space), said in the form of, for example, in the 1980 S, for L/S (including m / 100 (including 100 m or so feet distance, it says 100 (including Line width (Line) m/Line spacing (Space), including 100 m (including 100 m = 0.1 mm).In the early 21st century, the L/S to 50 (including 50 (including m/m, has realized the close (including 50 m = 0.05 mm).The pin pitch ultra-micronization model.the response the further miniaturization of electronic equipment and high functional requirements.In order to achieve further more lighter, thinner and function FPC, into the indispensable element in order to fine lines.But there is no end in the market demand.
From "copper etching method" to "copper plating method"
Market need further fine lines, namely the hyperfine circuits.But previous manufacturing method is close to limit.Previous FPC manufacturing process USES is "copper etching method", is a kind of the method of using photosensitive.But this does not constitute a more fine lines.In order to remedy the situation, developers are starting to grope for a new manufacturing method, finally developed the "copper plating method".This method is also known as half addition process, so its biggest characteristic is to use the electrolytic copper plating.From induction has been in the technology department is responsible for the production of fine line products, is now in Sumitomo Electric USA, Inc., in the noguchi navigation directly participate in the development of the "copper plating method".
"Is the key to form in the electrolytic copper plating line design, but if you can't let the copper plating adhesion equably on the circuit board, then the formation of line pattern will be uneven.Line section height must be consistent, therefore must be practical and good control is crucial for copper plating adhesion of ion supply.In the process of trial and error, we found the most suitable conditions, establish the manufacturing method."(noguchi)
Epochal shift - FPC in the application of the actuator
Now, in Japan with other companies in the industry also gradually adopt half addition method, but it was extremely has epoch-making significance, carve out the hyperfine circuit manufacturing method.People through the manufacturing method breaks through the "(including 50 m" this checkpoint, 25 ~ 20 (including "m" is realized.Can say "fine line era" has since pulled open heavy curtain.Smartphones actuator coil carrying camera was originally developed for hard disk usage technology, but due to the heavily favored by the market, now still in the stage of mass production.With the evolution of the fine lines, FPC is actuator used in camera, this means that the shift of FPC existence itself.Entry to about 30 years has been committed to FPC r&d technicians Tian Xin we pointed out: "the shift from wiring material into functional parts."
"In the past, FPC as wiring material supplied to the market, and is applied to the actuator, then opens up to the functional components path of evolution.The FPC is actuator used in camera, because magnetic coil are formed by fine lines, and through magnetic force can achieve 'hand shake proof this feature.Compared with the simple wiring material, its purpose and great changes have taken place in the existence reason."(on the field)
In addition to the "copper plating method" the manufacturing technology, the fine line, also joined the new technology.With FPC high functional this demand, the conductor layer is two-sided, and as a key to the connection between the layers, nano conductive paste has also developed a revolutionary technology.In addition, still developed can supply power to electronic machine without connect the power cord of small-sized, thin wireless power supply module.
"For effectively using the functions of fine lines, explore new electronic machines and expand its use, is I now the task.We are taking measures to take the initiative to dig new demand, for example, use the thin and small character, applied to various kinds of machines or medical human wearable."(on the field)
The comprehensive strength of the sumitomo electric industries contribute to the evolution of the FPC
With head office located in zi, county sumitomo electric Print Circuit co., LTD, led by Japan at home and abroad a total of three FPC manufacturing network, but only the Japan domestic branches in the production of fine line products.The company President appointed iwade explain why I do this is to ensure its uniqueness.
"Fine chemical manufacturing technology brings together a variety of unique or proprietary technology.In addition, conform to the specifications of the new 5 g FPC, also USES the unique materials technology.If these products on a global scale, it is possible to follow or copy by other company.In addition, in order to ensure and develop the company's unique technical excellence, we decided to just produce new products in Japan.And the technical strength is not just rely on the strength of the company, the more is mainly rely on the comprehensive strength of the sumitomo electric group to play with, I think this is one of the strengths of the company FPC."(vertical field)
The next chapter will introduce manufacturing branches outside Japan carrying out international business status quo.
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