Custom PCB soldering issues

[thijsfranssen]

Hi, 

I am working on a custom PCB. I ordered them at JLCPCB and I have some issues with the soldering. I noticed in a few boards there is a short in the board between the NRF VDD line and GND. Using a thermal camera I found out there are multiple boards with multiple components getting hot when injecting power with limited current.

I set the power supply to 3,8V and current to max 80 mA. All shorts are gone when i removed the NRF9160 from the board by using a pre heater and hot air. 

 I also added the Gerber file. Is there anything I can do to improve solderability to this design? 

nRF_Board_gerber.zip

Thanks!

[Elfving]

Hello,

Did you do the soldering yourself, or was the components machine-soldered on by JLCPCB?

Regards,

Elfving

[thijsfranssen]

Hi Elfving, 

No it is done by JLC. They did do X-Ray inspection and from that they noticed some rework was needed

"For the reworking, the solder was not quite sufficient at that time, and we found it based on the X-ray inspection and made the reworking."

[thijsfranssen]

I found a project online (https://www.findmycat.io/docs/CircuitBoard/JLCPcbManufacturing) that also uses JLCPcb as the manufacturer. So is should be possible using their services. FindMyCat-Gerber.zip

I noticed some differences in the design, is their anything that can cause a advantage?