HDI PCB High Tg Immersion God Surface

 Is PCB heat resistant?

What is the temperature resistance of the PCB circuit board?
The temperature performance of the PCB circuit board is related to the receiving temperature of the raw materials, solder paste, and surface parts. Generally, the PCB circuit board can withstand a temperature of up to 300 degrees for 5-10 seconds; when the lead-free Wave Solder for PCBA is used, the temperature is about 260. Lead is about 240 degrees.

　　PCB circuit board heat resistance test:
　　 1. First, prepare the PCB production board and tin furnace.
　　 Sampling 10*10cm substrate (or laminated board, finished board) 5pcs (copper-containing substrate without blistering layered scene)
　　Aluminum base board: 10cycle or more
　　 high frequency mixing pressure plate: above LOWCTE15010cycle
　　HTg data: 10cycle or more
　　Normal data: more than 5cycle
　　Finished board: LOWCTE1505cycle or more; HTg data or more 5cycle; Normal data or more 3cycle.
　　2, set the tin furnace temperature to 288±5 degrees, and use contact temperature measurement to calibrate;
3. Dip the flux with a soft brush first, smear it on the surface of the board, then use the crucible tongs to take the test board and immerse it in the tin furnace, take it out after 10 seconds and cool it to room temperature, visually see if there is any bubbling and exploding board, this is 1 cycle ；
　　4. If there is a result of blistering and cracking, immediately stop the immersion tin to analyze the initiation point f/m. If there is no result, continue to stop the cycle until the cracking, starting from 20 times;
　　 5. The blistering part needs to be sliced and analyzed, understand the source of the detonation point, and take pictures.
　　 The above content about the temperature resistance of the PCB circuit board, I believe everyone understands it.
PCB circuit boards will have some bad results at overheating temperatures. Therefore, it is necessary to stop understanding in detail about the temperature resistance of PCB circuit boards of different materials and not exceed the maximum temperature limit, so as to prevent PCB circuit boards from showing scraps. Add capital.