PCB price estimation factors and calculation

PCB price estimation factors and calculation
The price of PCB is something that many buyers have been puzzled about Many people also want to know how these prices are calculated when placing orders online Let's talk about PCB pricing together
Price difference caused by printed circuit board
1. Various factors affecting price PCB
1. Price difference caused by different printed circuit boards
For example, ordinary double-sided board, the sheet material generally has FR4 (Shengyi, master board, Guo Ji, three prices from top to bottom), the thickness is 0.2mm to 3.0mm, and the thickness of copper is 0.5oz to 3oz All these have resulted in a huge price difference of plates; As far as soldering ink is concerned, there is also a certain price difference between ordinary thermosetting oil and photosensitive green oil
2. Surface treatment processes of different printed circuit boards cause price diversity
Common ones are: OSP (anti oxidation), lead free tin spray (environmental protection), gold plating, immersion gold, and some combined processes The price of the above process becomes more expensive over time

3. Difficulties caused by price difference Printed circuit board itself
Two kinds of PCB have 1000 holes The hole diameter of one plate is larger than 0.2mm, and that of the other plate is smaller than 0.2mm, which will lead to different drilling costs All types are larger than 4mil, and one type is smaller than 4mil, which will also lead to different production costs; Secondly, some designs that do not follow the normal circuit board process are also additional funds, such as half holes, embedded blind holes, holes on magnetic chips, and button board printing carbon oil
4. The different thickness of copper foil causes price diversity
Common copper and platinum thicknesses are: 18um (1/2OZ), 35um (1OZ), 70um (2OZ), 105um (3OZ), 140um (4OZ), etc Over time, the thickness of the above copper foil becomes more expensive
5. Customer's quality acceptance criteria
Commonly used are: IPC2, IPC3, enterprise standards, military standards, etc The higher the standard, the higher the price
6. Mold fee and test stand
(1) Mold cost.  For samples and small batches, the general plate factory uses drilling and milling for forming, and there is no additional grinding cost Mass production requires a die, so there is a set of die costs The quotation of the board factory is generally above 1 yuan, 000 yuan
(2) Test fee: The prototype is generally tested by flying probes, while the board factory generally charges a test fee of 100-400 yuan; The test rack must be opened for batch testing, and the quotation of the general board manufacturer is between 1000 and 1500 yuan
7. The price difference caused by different payment methods
the shorter The payment time
8. Order Quantity/Delivery Time
(1) The smaller the quantity, the more expensive the price is, because even if it is one piece, the board factory must do engineering data, and the film has been released, which process is independent
(2) Delivery time: The data delivered to the PCB factory must be complete (GERBER information, the color of the characters and some special requirements must be clearly written)
From the above discussion, it is not difficult to see that the processing price of PCB has its inherent intangible factors This article can only provide a rough price range for reference Of course, the specific price is still directly related to the manufacturer
2. Quotation of various factors
For PCB, we have a set of evaluation formulas (that is, the utilization rate of the board) The details are as follows: based on the 1 square meter board, its size is 1020mm * 1020mm, assuming that the printed circuit board to be evaluated is L and the width is H The quantity is (1020/L+5) * (1020/H+5)=Z (that is, the typesetting quantity) Unit price=X/Z, and X is the following price
Material:
1L FR-1 Price per square meter (including processing fee): 130RMB
2L FR-4 price per square meter (including processing fee): 430RMB
4L FR-4 price per square meter (including processing fee): 720RMB
6L FR-4 price per square meter (including processing fee): 1200RMB
8L FR-4 price per square meter (including processing fee): 1800RMB
10L FR-4 price per square meter (including processing fee): 3500RMB
12L FR-4 price per square meter (including processing fee): 5500RMB

The above is the explanation given by the editor of pcb circuit board company.
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