After manufacturing the Metal Core PCB, there is a shelf life, once the shelf life has passed, we need to bake the bare board before assembling the components, otherwise the MCPCB is prone to burst when the SMT line is produced. There are industry specifications for both how long MCPCB can be stored and how long they can be baked.
MCPCB Control Standard
- Unpacking & Storage
- If the packing bag is sealed, and the manufacturing date is within 2 months, it can be directly used before assembly.
- The manufacturing date is within 2 months, and the unpacking date must be marked after unpacking.
- The manufacturing date is within 2 months, and it must be assembled and used within 5 days after unpacking.
- Baking Time
- If unpacked for more than 5 days within 2 months of the manufacturing date, bake at 120±5°C for 1 hour
- Two months after the manufacturing date, baking at 120±5°C for 1 hour before assembly.
- Two to Six months after the manufacturing date, baking at 120±5°C for 2 hours before assembly.
- Six to Twelve months after the manufacturing date, baking at 120±5°C for 4 hours before assembly.
- The MCPCB after baking must be used up within 5 days (put into IR REFLOW), and unused board must be baked for another hour before assembly.
- Over half one year after the manufacturing date, bake at 120±5°C for 4 hours before assembly, and then send it to the production line to do HASL_LF before using.
Preservation & Baking Standard for in different regions
The specific storage time and baking temperature of MCPCB are not only related to the production capacity and production process of manufacturer, but also have a great relationship with the region.
- For areas with heavier humidity, the MCPCB must be used up within 24 hours when exposed to the air, otherwise it is easy to oxidize. After normal opening, it is best to use it up in 8 hours.
- For areas with a relatively dry climate, the preservation time of PCB will be longer, and the baking time can also be shorter. The baking temperature is generally 120±5°C, and the baking time is determined according to the specific situation.
The MCPCB with OSP or Gold Immersion has a shelf life of 6 months after packaging, and it is generally not recommended to bake for MCPCB with OSP.
If you have other questions about MCPCB, welcome to contact us.
