Causes analysis of PCB price difference
First, the different PCB material cause the diversity of the price
Take normal double side for example, the normal material including FR-4,CEM-3 and so on ,board thickness from 0.6mm to 3.0mm, copper thickness from 1OZ to 3OZ, All of these results in a huge price difference on sheet material. As for soldermask, there is a certain price difference between general Heat Set soldermask and Photo Imageable Solder Mask,that cause the diversity of the price.
Second, PCB with different manufacturing process cause the diversity of the price.
Different manufacturing process cause different cost.Such as Immersion gold and HAL, routing and punching,the use of silkscreen or dry film will cause different cost, all these cause diversity of price.
Third, the different difficulty level of PCB cause diversity of price.
The different difficulty level of PCB cause diversity of price even use same base material and same manufacturing process.For example,if two kind of boards both have 1000 holes, all holes size are bigger than 0.6mm on one board, but all holes of another board are lesser than 0.6mm,that will cause different drilling cost; If two same boards but with different trace width/spacing, one is bigger than 0.2mm, another board is lesser than 0.2mm, that will also cause different production cost. Because of the scrap rate of the difficult boards is higher, the inevitable costs increase, causing the price of diversity.