Technical
What are the advantages and applications of flexible microcircuits?
FPC Reinforcement Types
Criteria for Classification of electronic Component Classes
Four softwares suitable for beginners to draw PCB circuit boards
What information is needed for SMT processing?
What are the advantages of small and medium batch SMT processing?
PCB related knowledge- The purpose of each layer of the PCB
How to do heat resistance testing for PCB board
Detailed explanation of rigid-flex board and IC carrier board
PCBA prototype procedure
Defects which can be detected by the SPI
What are the spacing requirements for designing PCB circuit boards?
What are the classification and advantages of PCB metal substrates?
Difference between the processing technology of 1Layer AL PCB and 2Layer AL PCB
Introduction of FPC Cable and its usage
advantages of Shenzhen SMT assembly factory
inspection items before PCB ordering
usages of ceramic substrates
main applications of PCB boards
Cost-effective PCB product services
How to check short circuit of a circuit board during manual soldering
Identify the polarity of electronic components during PCBA processing
Means Which Can Prevent Component Shifting in SMT Processing
Skills of PCB prototype manual soldering
Reasons for the shift of Components in the SMT Process
Seven Types of PCB Probes
What Should Be Paid Attention to in Layout of High-frequency PCB
Precautions for PCB CCL Selection
Advantages of LED Plant growth light
Advantages of using LED grow lights to grow industrial hemp
Detailed explanation of PCB manufacturing process and precautions
Detailed explanation of PCB manufacturing process and precautions
How to draw multilayer PCB on Altium Designer
Three basic elements of interference and how to suppression them.
Decrease interference between digital circuit and analog circuit
SMT Component Placement Process Of Parts : Manual Placement
SMT factory incoming PCB material inspection
Basic concepts commonly used in PCB design
Ideas and principles of High speed PCB layout
Component layout rules and safety distance considerations
SMT assembly process quality specification
5 points in PCB layout
Professional interpretation of SMT
Advantages and disadvantages of different PCB surface treatment
Special process in PCB prototype
Why the via hole become open after component assembly
Keep the cost of the PCB as low as possible
what are the causes of PCB board heating radiation problem
Pad size and via diameter dimensions consideration in PCB prototyping
How to Judge the Acceptance of PCB Quality
Which Color Circuit Board Sells the Most Expensive
Method to Solve the Noise Interference of Power Supply on High-frequency PCB Board
Disassembly Skills of Chip Components on PCB
What Factors Should Be Considered in the Selection of High-frequency PCB CCL
How to Place Special Components during PCB Layout
What Are the Functions of Capacitors in Circuits?
Testing Techniques for Common Electronics Components
What to do if There is a Short Circuit on the PCB
Desoldering Principles and knowhow during PCBA Processing
Black Oxidation of the Inner Layer of the Multilayer PCB
How to Ensure the High-performance Design of PCB
What Is the Printing Process of SMT Solder Paste?
PCB without fiducial mark, Is There Any Way to do SMT for It
What Are the Benefits of Reserving Break-up Tab for PCB Production
How Does SMT Affect PCB Production Time and Speed It Up
Classification of PCBs from three aspects
Common Problems and Solutions for Dry Film pasting during PCB Manufacturing process
Several Elements to Inspect after PCB Design
What is a halogen-free circuit board?
What Do Capacitive Coupling and Decoupling Mean?
What Are the Differences Between PCB Paste Mask and Solder Mask?
How PCBA Is Packaged and Shipped
How long can PCBA finished products be stored?
What Are the Differences and Relations Between PCB, PCBA, and SMT?
PCB Baking Specifications
PCB "Solder Mask Tenting" and "Solder Mask Opening"
Five reasons for PCB deformation and six solutions
Importance of first article inspection of PCBA board
Temperature zone standard for SMT reflow soldering
Small and medium volume PCB manufacturers in China
The main reason for PCBA cleaning
For power filter, the more capacitors, the better?
What does PCBA programming mean?
Content of PCB incoming testing
What conditions must be met for PCB circuit board soldering?
What is Blind via and Buried via
PCBA Manufacturers Temperature and Humidity Sensitive Components Management

PCB Baking Specifications

I. The specification of PCB control

1. PCB unpacking and storage
(1) PCB board sealed and unopened can be directly used SMT assembly within 2 months of manufacturing date.
(2) The PCB board manufacturing date is within 2 months, and the unpacking date must be marked after unpacking.
(3) PCB board manufacturing date is within 2 months, after unpacking, it must be SMT assembly and used within 5 days.

2. PCB baking
(1) If the PCB is sealed and unpacked for more than 5 days within 2 months of the manufacturing date, please bake it at 120 ±5°C for 1 hour.
(2) If the PCB is more than 2 months from the manufacturing date, please bake it at 120 ±5°C for 1 hour before SMT assembly.
(3) If the PCB goes beyond 2 to 6 months of the manufacturing date, please bake it at 120 ±5°C for 2 hours before SMT assembly.
(4) If the PCB goes beyond 6 months to 1 year than the manufacturing date, please bake it at 120 ±5°C for 4 hours before SMT assembly.
(5) The baked PCB must be used up within 5 days (put into the IR REFLOW), and the unused PCB must be baked for another hour before being used SMT assembly.
(6) If the PCB is more than one year from the manufacturing date, please bake it at 120 ±5°C for 4 hours before SMT assembly, and then send it to the PCB factory for re-spraying tin before SMT assembly.

3. PCB baking method
(1) Large-scale PCBs (≥16 PORT) are placed horizontally, and the maximum number of a stack is 30 pieces. Open the oven within 10 minutes after the baking is completed, take out the PCB, and let it cool naturally (require using anti-bending fixture).
(2) Small and medium-sized PCBs (including 8PORTs below 8PORT) should be placed horizontally, and the maximum number of a stack is 40 pieces. The number of vertical type is unlimited. Open the oven within 10 minutes after the baking is completed, take out the PCB, and let it cool naturally (require using anti-bending fixture).


II. The preservation and baking of PCBs in different regions

The specific storage time and baking temperature of the PCB are not only related to the production capability and production craft of the PCB manufacturer, but also have a great relationship with the region.

The PCB made by OSP process and immersion gold process generally has a shelf life of 6 months after packaging, and it is generally not recommended to bake for OSP process PCB.

The preservation and baking time of PCB has a lot to do with the region. In the south China, humidity is generally heavier, especially in Guangdong and Guangxi. In March and April of each year, there will be "super humid" weather, and it is cloudy and drizzly for days on end and very humid at this time. PCB must be used up within 24 hours when exposed to air, otherwise it is easy to oxidize. After normal opening, it is best to use it up in 8 hours. For some PCBs that need to be baked, the baking time should be longer. In the northern regions of China, the weather is generally dry, the PCB storage time will be longer, and the baking time can also be shorter. The baking temperature is generally 120 ± 5℃, and the baking time is determined according to the specific situation.


PCB baking oven