Ordinary double-sided board, for example, material is generally FR4 (Shengyi, Jiantao, Guoji, three prices from top to bottom), the thickness ranges from 0.2mm to 3.0mm, and copper thickness varies from 0.5oz to 3oz .All of these factors result huge differences of price.
2, Surface Technical
Common surface technology are: OSP (anti-oxidation), HASL(with lead), HASL (lead free), gold-plated, immersion gold and some combination of technology, etc., these technologies are more and more expensive.
3, Difficulty Coefficient of PCB
Two kinds of circuit boards have 1000 holes, a plate aperture greater than 0.2mm and the other plate aperture is less than 0.2mm will form a different drilling costs. Such as two circuit boards, all of information are same except conductor width and spacing.One board are greater than 4mil, one is less than 4mil, will also cause different production costs. In addition, other technology will need to pay extra fees,such as half hole, buried hole, blind via(hole) and Printed carbon oil.
4, Copper Thickness
Common copper thickness: 18um (1 / 2OZ), 35um (1OZ), 70um (2OZ), 105um (3OZ), 140um (4OZ), etc., The thicker of copper foil, the more expensive the price will be.
5, Acceptance Criteria
Commonly used: IPC2, IPC3, enterprise standard, military standard, etc., the higher the standard, the price will be higher.
In addition, mode, test fixture, quantity, delivery and payment, all of them will cause the different price of PCBA board.