Circuit Board : Printed Circuit board, PCB Board or PCB Circuit Boards
A circuit board (PCB) mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it.
Printed circuit boards are used in all but the simplest electronic products. They are also used in some electrical products, such as passive switch boxes.
Define A Circuit Board
To define what a PC board is, we have to look back at history that traces the evolution of circuit boards back to the early 20th century. The first PCB patents for "printed wire" were issued in the early 1900's but PCBs that we would recognize first came into use after World War II. In 1925, Charles Ducas of the United States submitted a patent application for a method of creating an electrical path directly on an insulated surface by printing through a stencil with electrically conductive inks. Hence the name "printed wiring" or "printed circuit." An Austrian scientist, Dr Paul Eisler, is credited with making the first operational printed wiring board in 1943. It was used as a replacement for bulky radio tube wiring.
This Circuit Board is developed in American first, Then as the Labor cost of USA increase , Start to move Korea and Taiwan , that's why now Korea and Taiwan's Mircro electronic technology is so good .
After 20 years developing of Circuit boards in Korea and Taiwan , Labor cost and Environment reason , They start to move Circuit board factory to China , Special in Shenzhen , 20 Years again , China PCB circuit boards manufacturer take the most market in the world , 65% percent or more in the circuit board market , European , USA , Taiwan , Korean , Just keep some high level Circuit board manufacturing there , Like HDI , Military projects,
Soon or later ,HDI Circuit board will all move to china PCB Manufacturer , Single Side Circuid boards, double side PCB Board manufacturing will move to west china or india , Vietnam . The same reason , Cost and Environments problem .
Why is Circuit board's Solder Mask Green ?
Ever wonder why the solder mask on almost every circuit board made is green? Well there seems to be any number of unsubstantiated reasons. Everything from the involvement of the US government in developing and using the first circuit boards to the how easy it was on your eyes during the long hours of hand assembling the first boards.
Here's the most believable explanation I've heard. The original masks used a base resin that was a "brownish yellow" and a hardener that was a deeper muddy brown. When they were mixed together they created a honey brown color that apparently not very appetizing. They tried adding red pigments but it became a rusty adobe color and using blue simply made it a darker brown. None of them were very appealing colors. Since the laminate materials at the time had a green hue they tried adding more yellow and some blue and ended up with an acceptable green color. It became the standard color we are still using today.
Why China Circuit board Cost is so low ?
China Have thousands of Circuit board Manufacturer, and other thousands of Circuit board material supplier to server PCB Manufacturers, Every Cost of Circuit board production process will be the lowest . Like Raw Material , Most India PCB Raw Material buy from china ,
Economies of scale will cause China offer the low cost circuit board , I think China PCB Manufacturer will keep 5 years cost advantage , then will lose competitive , But still keep advantage of Flexible PCB , HDI Circuit board , Rigid-flex circuit boards , High level Multilayer PCBs.
If you are looking for circuit board manufacturer, Come to china for sure , How to find trusting PCB Manufacturer from thousands of Circuit board fabrication, that's other big challenge . RayMing has been focusing on Circuit Board manufacturing more than 10 years , Take a chance to talk with them .