How to charge for SMT patch processing

kingford is a professional PCBA processing manufacturer, with 21 years of SMT patch processing experience, and can provide PCBA OEM, PCB board production, SMT patch processing, component purchasing, patch plug-in welding, assembly and testing and other one-stop services. Many friends for SMT patch processing how to charge is not clear, next for you to introduce. SMT processing fees of kingford are as follows for reference. Please contact customer service staff for real quotation.

1. Details of SMT SMT processing charges include: SMT welding fee + engineering fee +DIP plug-in fee + urgent fee + others (for example: PCB board fee, steel mesh fee, freight, test fee, special process, packaging fee, etc.).

2. When customers send materials, please make more fragile materials according to the standard percentage in the circle, and the excess materials can be returned. In addition, please note that the details of incoming materials must be clearly marked, which correspond to the BOM in detail one by one, and cannot be roughly marked.

3. Engineering fee: It is charged according to the number of points and complexity of the board. The total cost of SMT welding ≧3000 yuan can be exempted from the engineering fee.

4. SMT welding cost, according to different requirements of components, is calculated directly from the welding count number in PCB file, including patch points and DIP plug-in points, which is the total number of points * unit price.

5. Patch plug-in processing charging method: 0402-1206 according to the conventional welding spot, the minimum 0.008 yuan/point, the conventional proofing small batch 0.008-0.015/ point, 0201/BGA according to the special welding spot, the minimum 0.02/ point. DIP plug-in points to 0.035 yuan/point.

6. Urgent charge: it is also determined by the number and complexity of the board. The promised exemption is not included, and the normal delivery date does not need to be charged.

7. Other expenses: Generally not charged, but such as PCB production, board copying, steel mesh, special packaging, testing, washing board will be charged, if you need us to test, please remember to provide fixtures.

8. As for the normal delivery time, the time should be calculated from the arrival of PCB board, BOM component materials, steel plate and other materials. Because of the unavoidable force, according to the industry standards in the circle. The promised time will be calculated according to the promised time, and the sample will take precedence, which will be arranged by the sample production line.

How does SMT plant do component control well

I. Environmental control

The ambient temperature of the workshop where temperature and humidity sensitive elements are used is 18-28℃, and the relative humidity is between 40%-60%; Relative humidity of moisture-proof box during storage 10%, the temperature is between 18-28℃; The material clerk shall check the temperature and humidity of the moisture-proof box every 4 hours and record the temperature and humidity value in the Temperature and Humidity Control Table. If the temperature and humidity exceed the specified range, immediately notify relevant personnel to improve and take remedial measures (such as placing desiccant, adjusting indoor temperature, or taking out components from the faulty moisture-proof box and placing them in a qualified moisture-proof box). The time of opening or opening the temperature and humidity environment space in each closed area of the patch processing plant shall not exceed 5 minutes to ensure that the temperature and humidity conditions can be kept within the control range.

Two, process control

1. When removing the vacuum package of humidity sensitive components on the SMT patch line, you must wear electrostatic bracelets and gloves and open the vacuum package on a well-protected tabletop. After being disassembled, check whether the humidity card changes according to the requirements on the label on the package bag. For SMT patch IC conforming to the requirements, attach "Humidity Sensitive Element Control Label" on its packaging.

2. When the production line receives bulk humidity sensitive components, it shall confirm whether the components are qualified according to the "Humidity Sensitive Components Control Label", and give priority to the qualified components.

3. Humidity sensor (IC) after vacuum packaging, before backwelding in the air exposure time shall not exceed the humidity sensor grade and life.

4. For the IC that needs to be baked and unqualified, it shall be handed over to the quality control personnel for rejection processing and returned to the warehouse.

Third, control method

1. Feeding inspection - moisture-proof bag should be attached with desiccants, relative humidity card, moisture-proof bag should be standardized outside the relevant text warning slogans. If the packaging is not good, it needs to be confirmed by relevant personnel.

2. Material storage -- unopened materials are stored according to the instructions; If the opening materials need to be returned to the warehouse for storage, they shall be vacuumized and sealed in moisture-proof bags after baking. If the opening material is not used immediately, store it in a low temperature oven.

3. On-line operation -- unpack when in use, and check and fill in the humidity indicator card; Fill in the refueling control card and indicate the symbol of temperature and humidity sensitive element; After dehumidification according to storage regulations, returned materials shall be packed and stored according to corresponding requirements.

4. Dehumidification operation -- Select baking conditions and time according to the humidity level of SMT patch components, environmental conditions and opening time.