Why do all the ground leads short outs beteween each other after Packing Virtex-4 via BGA?

After We have assembled the Virtex-4 FPGA BGA package on our custom design PCB, we check for short circuits between all power grounding and they shows short cut between each other. Please tell us about any process for debugging this issue.

November 16, 2023

Check you CAD database.
Test you custom PCB before BGA packing.
Check every pin on the board.
Consider if Virtex-4 is too old to run with your circuit.

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

What Others Are Asking

Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?

Last week, I visit a PCBA manufacturer for our new project. They not only introduce in-circuit tester but also flying probe tester, which can both ensure the quality level. So, Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?

Oliver Smith October 31, 2023

What’s the thickness of FR4 substrate that one should take when designing a micro-strip antenna with an HFSS tool?

I am designing a micro-strip antenna with an HFSS toll, what’s the thickness of FR4 substrate that one should take ?

Oliver Smith October 27, 2023

How do surface mount components withstand heat of reflow while through hole components can not?

Some online tutorials about soldering TH components, like transistors and ICs, are delicate components and can be easily damaged by heat. When it comes to soldering surface mount IC and components, some prefer to use a reflow oven which heats up the them to a temperature above the melting point of solder. So why?

Oliver Smith December 8, 2023

Why do all the ground leads short outs beteween each other after Packing Virtex-4 via BGA?

Oliver Smith

Oliver Smith

What Others Are Asking

Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?

What’s the thickness of FR4 substrate that one should take when designing a micro-strip antenna with an HFSS tool?

How do surface mount components withstand heat of reflow while through hole components can not?

Read Detailed Advice From Blog Articles