source:Industry News release time:2022-04-09 Article author:sznbone Popular:pcb
With the development of electronic products in the direction of miniaturization, the size of chip components is getting smaller and smaller, and the requirements of Mingao components on the processing environment are also becoming higher, which puts forward higher requirements for SMT chip processing. As a In addition to the strict control of the process flow, the SMT chip factory with efficient operation and good quality control needs to strictly control the environment of the SMT workshop, and clearly understand some precautions.
1. Environmental requirements of SMT chip processing workshop
SMT chip production equipment is a high-precision mechatronics equipment. The equipment and process materials have certain requirements on the cleanliness, humidity and temperature of the environment. In order to ensure the normal operation of the equipment, reduce environmental damage to components and improve quality , The SMT workshop environment has the following requirements:
1. Power
Generally, single-phase AC220 (220±10%, 0/60Hz), three-phase AC380 (380±10%, 50/60Hz) are required, and the power of the power supply should be more than double the power consumption.
2. Exhaust air
Reflow and wave soldering equipment needs to be equipped with an exhaust fan. For a full hot blast furnace, the minimum flow value of the exhaust duct is 500 cubic feet per minute (14.15m3/min).
3. Temperature and humidity
The best ambient temperature in the production workshop is 23±3°C, generally 17~28°C, and the relative humidity is 45%~70%RH. According to the size of the workshop, a suitable temperature and humidity meter is set up for regular monitoring, and it is equipped with temperature adjustment. Humidity facility.
4. Air source
The pressure of the air source is configured according to the requirements of the equipment. The air source of the factory can be used, or an oil-free compressed air machine can be configured separately. The general pressure is greater than 7kg/cm2. Clean and dry purified air is required, so the compressed air needs to be de-oiled , Dust removal, water removal treatment. Use stainless steel or pressure-resistant plastic pipes as air pipes.
5. Anti-static
Workers need to wear anti-static clothing, shoes, and anti-static wristbands to enter the workshop. The anti-static work area should be equipped with anti-static floors, anti-static seating pads, anti-static packaging bags, turnover boxes, PCB racks, etc.
PCBA patch processing (SMT)
2. Precautions for SMT chip processing
1. Solder paste refrigeration
The solder paste has just been bought. If it is not used immediately, it needs to be refrigerated in the refrigerator. The temperature is preferably between 5°C and 10°C, not lower than 0°C. There are many explanations on the Internet about the stirring and use of solder paste. Not much introduction.
2. Replace the consumable parts of the placement machine in time
In the placement process, due to the aging of the placement machine equipment and the damage of the suction nozzle and feeder, it is easy to cause the placement machine to be skewed, resulting in the occurrence of high material throwing, reducing production efficiency and increasing production costs. In the case of machine equipment, it is necessary to carefully check whether the suction nozzle is blocked or damaged, and whether the feeder is in good condition.
3. Measuring furnace temperature
The quality of PCB circuit board soldering has a lot to do with the reasonable setting of process parameters for reflow soldering. Generally speaking, two furnace temperature tests are required a day, and at least once a day to continuously improve the temperature curve , Set the temperature curve that best fits the welding product. Do not miss this link for the sake of production efficiency and cost saving.
Read recommendations:
Six-layer Immersion Gold Board (BGA)
Six-layer Immersion Gold Board (BGA)
Popular recommended products
High frequency PCB
2021-04-27Computer card board (four layers)
2021-04-25Single-sided double-layer AL base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-27Silver oil perforated plate (double-sided)
2021-04-27Display board (six layers)
2021-04-27Mobile phone template (six layers)
2021-04-27Single copper base PCB
2021-04-27High frequency PCB
2021-04-27High frequency PCB
2021-04-27Laminate copper-based PCB after 4L (sample)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24Six-layer Immersion Gold Board (BGA)
2021-04-27Aluminum substrate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Network communication board (sixth floor)
2021-04-29Six-layer Immersion Gold Board (BGA)
2021-04-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24Six-layer Immersion Gold Board (BGA)
2021-04-27Mobile phone board
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26SMT stickers
2021-05-27SMT stickers
2021-05-27DIP plugin
2021-05-27Mobile phone board
2021-05-27DIP plugin
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Related Information
The relationship between PCB safety distance and voltage
2024-04-22SMT surface mount processing.Hybrid circuit board PCB
2024-04-15PCB enterprises should pay attention to SMT matters.Electronic components PCB
2024-04-03PCB - the core building block of electronic products.Automotive Electronics PCB
2024-03-25PCB - the bridge and link of the electronic world
2024-03-18How to define high-frequency and high-precision circuit boards.Industrial Electronics PCB
2024-03-11USB PCB interface layout and wiring requirements
2024-01-22Electrolytic capacitor PCB.Steps for using PCB pins
2024-01-15Automotive ElectronicWhat aspects should be considered when processing and manufacturing PCB boards?
2024-01-08Electrolytic capaciWhat is the difference between a gold-plated circuit board and a gold-plated one?
2023-12-25When grinding PCB boards, attention should be paid to.Oscillator (belonging to crystal) PCB
2023-12-18Industrial Electronics PCB!What precautions should be taken when copying and grinding PCB boards
2023-12-11Do you know who is more suitable for LED direct display, regarding the difference between PCB board
2023-12-05Aluminum electrolytic capacitor PCB.What are the standards for selecting PCB boards
2023-11-27Surface Mount Technology (SMT) Phase PCB
2023-11-20Oscillator (belonging to crystal) PCB.The main functions of PCB board
2023-11-13What is the difference between RO filter and PCB filter
2023-11-06Method for determining blind hole PCB board
2023-11-01Electronic Manufacturing Services PCB!What are the effects of PCB board color on performance?
2023-10-23Introduction to the Manufacturing Steps and Requirements of PCBA Test Stand
2023-10-16PCB version maturity stage.AOI circuit board price
2023-09-25How to maintain a PCB circuit board
2023-09-19Development Trend of Printed Circuit Board.Zener diode PCB Vendor
2023-09-14Common problems and cause analysis of PCB circuit board sampling.Zener diode PCB price
2023-09-08What are the issues that need to be understood in PCB circuit board design?IGBT module PCB factory
2023-09-08How to reduce the risk of bending and deformation in PCB circuit board production?Inverter PCB Produ
2023-08-16What are the three main factors that constitute welding defects in PCB circuit boards?Multilayer PCB
2023-08-16The structure of a glass teapot.LCD Module PCB factory
2023-08-11Glass teapot.Inverter PCB Processing
2023-08-11PCB online debugging
2023-08-08