How can I determine BGA land pad diameter for given ball diameter?

I'm working on a project which requires the use of a CSP package. The product's datasheet provides ball pitch and ball diameter but nothing about the preferred land pad diameter. How can the pad diameter be worked out from these figures assuming an NSMD land?

You can refer to the following table.

Ball Dia. Reduction Land Pattern Density Level Land Dia. Land Variation
0.15 15% C 0.13 0.15-0.10
0.20 15% C 0.17 0.20-0.14
0.25 20% B 0.20 0.20-0.17
0.30 20% B 0.25 0.25-0.20
0.35 20% B 0.30 0.35-0.25
0.55 25% A 0.40 0.45-0.35

 

Read More: BGA PCB Assembly

#PCB Design

Picture of Oliver Smith

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.
Picture of Oliver Smith

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.

What Others Are Asking

Why are RF PCBs hard to design?

I am a project procurement. Recently, Our project is to develop a television. Of all the materials supply, PCB was the slowest one. And even our engineer took part in the discussion with PCB supplier to push them. Is it really hard to make a RF PCB?

How do I use two antennas with a single Bluetooth module? (BLE repeater)

I am working on a project that uses small Bluetooth low energy (BLE) beacons to track important items. Is there a way to connect two antennas to a single BLE module that could either listen/broadcast on both antennas or multiplex between the two? Or any other idea?

Why is wireless charging not ubiquitous?

Wireless charging is so convenient for user because it doesn’t need any wire, but it is not so popular as market. It must be some reasons in supplier side, isn’t it?

Read Detailed Advice From Blog Articles

Scroll to Top