How much is Pcb circuit board temperature ? how to test pcb circuit board heat resistance? These questions are customers often consult , we will give you a detailed answer as following.
First: What is the maximum temperature resistance of the pcb circuit board and how long is the temperature resistance time?
The maximum temperature of pcb circuit board is 300 degrees, 5-10 seconds. Lead-free wave soldering temperature is about 260, lead 240 degrees.
Pcb circuit board temperature resistance
Second: heat resistance test
Preliminary preparation: circuit board production board
1. Sampling 10*10cm substrate (or laminated plate, finished plate) 5pcs; “(The copper-containing substrate has no blistering layering phenomenon)
Substrate: 10cycle or more
Plywood: LOW CTE 150 10cycle or more
HTg material 10cycle or more
Normal material 5cycle or more
LOW CTE 150 5cycle and above
HTg material 5cycle or more
Normal material 3cycle or more”
2, set the tin furnace temperature of 288 +/- 5 degrees, and use contact temperature measurement and calibration;
3, first with a soft brush dip flux, smear to the board surface, then use the pliers cheek to take the test board immersed in the tin furnace, timing 10sec, remove it and cool to room temperature, visually there is no bubble blistering, this is 1cycle ;
4. If there is a problem of foaming and bursting by visual inspection, immediately stop the analysis of the starting point of immersion tin f/m. If there is no problem, continue the cycle until the explosion of the board, ending at 20 times;
5, blistering needs slicing analysis, understand the origin of the detonation point, and take pictures.